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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2013	Jul. 18, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	WM
Entity Registrant Name	WASTE MANAGEMENT INC
Entity Central Index Key	0000823768
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		468,776,225

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 154	$ 194
Accounts receivable, net of allowance for doubtful accounts of $51 and $45, respectively	1,730	1,737
Other receivables	123	102
Parts and supplies	171	174
Deferred income taxes	83	76
Other assets	143	140
Total current assets	2,404	2,423
Property and equipment, net of accumulated depreciation and amortization of $16,540 and $16,112, respectively	12,469	12,651
Goodwill	6,391	6,291
Other intangible assets, net	411	397
Investments in unconsolidated entities	653	667
Other assets	684	668
Total assets	23,012	23,097
Current liabilities:
Accounts payable	696	842
Accrued liabilities	1,069	986
Deferred revenues	481	465
Current portion of long-term debt	776	743
Total current liabilities	3,022	3,036
Long-term debt, less current portion	8,994	9,173
Deferred income taxes	1,923	1,947
Landfill and environmental remediation liabilities	1,487	1,459
Other liabilities	768	807
Total liabilities	16,194	16,422
Commitments and contingencies
Waste Management, Inc. stockholders' equity:
Common stock, $0.01 par value; 1,500,000,000 shares authorized; 630,282,461 shares issued	6	6
Additional paid-in capital	4,569	4,549
Retained earnings	6,948	6,879
Accumulated other comprehensive income	134	193
Treasury stock at cost, 162,137,511 and 166,062,235 shares, respectively	(5,148)	(5,273)
Total Waste Management, Inc. stockholders' equity	6,509	6,354
Noncontrolling interests	309	321
Total equity	6,818	6,675
Total liabilities and equity	$ 23,012	$ 23,097

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 51	$ 45
Accumulated depreciation and amortization	$ 16,540	$ 16,112
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,500,000,000	1,500,000,000
Common stock, shares issued	630,282,461	630,282,461
Treasury stock, shares	162,137,511	166,062,235

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References + Details

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Operating revenues	$ 3,526	$ 3,459	$ 6,862	$ 6,754
Costs and expenses:
Operating	2,311	2,260	4,520	4,426
Selling, general and administrative	353	374	743	781
Depreciation and amortization	339	323	662	640
Restructuring	2	3	10	7
(Income) expense from divestitures, asset impairments and unusual items	11	33	15	33
Total costs and expenses	3,016	2,993	5,950	5,887
Income from operations	510	466	912	867
Other income (expense):
Interest expense	(122)	(121)	(244)	(243)
Interest income	1	1	2	2
Equity in net losses of unconsolidated entities	(8)	(11)	(16)	(18)
Other, net	2	(1)	(9)	(2)
Total other income (expense)	(127)	(132)	(267)	(261)
Income before income taxes	383	334	645	606
Provision for income taxes	127	115	213	204
Consolidated net income	256	219	432	402
Less: Net income attributable to noncontrolling interests	12	11	20	23
Net income attributable to Waste Management, Inc.	$ 244	$ 208	$ 412	$ 379
Basic earnings per common share	$ 0.52	$ 0.45	$ 0.88	$ 0.82
Diluted earnings per common share	0.52	0.45	0.88	0.82
Cash dividends declared per common share	$ 0.365	$ 0.355	$ 0.730	$ 0.710

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Consolidated net income	$ 256	$ 219	$ 432	$ 402
Unrealized gains and losses on derivative instruments:
Unrealized gains (losses), resulting from changes in fair value, net of tax expense (benefit) of $10, $(10), $10 and $(8), respectively	16	(16)	15	(12)
Reclassification adjustment for (gains) losses included in net income, net of tax (expense) benefit of $(3), $(2), $(3) and $0, respectively	(4)	(4)	(5)
Total Unrealized gains (losses) on derivative instruments	12	(20)	10	(12)
Unrealized gains (losses) on available-for-sale securities, net of tax expense (benefit) of $0, $0, $0 and $1, respectively	(1)	(1)		1
Foreign currency translation adjustments	(37)	(22)	(69)	2
Change in funded status of post-retirement benefit obligation, net of tax benefit of $0, $0, $0 and $0, respectively
Other comprehensive income (loss), net of taxes	(26)	(43)	(59)	(9)
Comprehensive income	230	176	373	393
Less: Comprehensive income attributable to noncontrolling interests	12	11	20	23
Comprehensive income attributable to Waste Management, Inc	$ 218	$ 165	$ 353	$ 370

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Tax effects on unrealized gains (losses) resulting from changes in fair value	$ 10	$ (10)	$ 10	$ (8)
Tax effects on realized (gains) losses on derivative instruments reclassified into earnings	(3)	(2)	(3)	0
Tax effects on unrealized gains (losses) on available-for-sale securities	0	0	0	1
Tax effects on change in funded status of post-retirement benefit obligations	$ 0	$ 0	$ 0	$ 0

- Definition

Tax effect of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

+ References + Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Consolidated net income	$ 432	$ 402
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	662	640
Deferred income tax (benefit) provision	(29)	8
Interest accretion on landfill liabilities	43	41
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets	(7)	1
Provision for bad debts	25	26
Equity-based compensation expense	34	15
Excess tax benefits associated with equity-based transactions	(7)	(9)
Net gain from disposal of assets	(10)	(7)
Effect of (income) expense from divestitures, asset impairments and unusual items and other	26	33
Equity in net losses of unconsolidated entities, net of dividends	16	18
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	(4)	(72)
Other current assets	3	(26)
Other assets	(5)	92
Accounts payable and accrued liabilities	(32)	5
Deferred revenues and other liabilities	(25)	(23)
Net cash provided by operating activities	1,122	1,144
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(210)	(154)
Capital expenditures	(501)	(730)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets	74	20
Net receipts from (deposits to) restricted trust and escrow accounts	(2)	17
Investments in unconsolidated entities	(24)	(40)
Other	(30)	(16)
Net cash used in investing activities	(693)	(903)
Cash flows from financing activities:
New borrowings	71	312
Debt repayments	(268)	(271)
Cash dividends	(341)	(329)
Exercise of common stock options	98	31
Excess tax benefits associated with equity-based transactions	7	9
Distributions paid to noncontrolling interests	(32)	(23)
Other		9
Net cash used in financing activities	(465)	(262)
Effect of exchange rate changes on cash and cash equivalents	(4)
Increase (decrease) in cash and cash equivalents	(40)	(21)
Cash and cash equivalents at beginning of period	194	258
Cash and cash equivalents at end of period	$ 154	$ 237

Condensed Consolidated Statement of Changes in Equity - 6 months ended Jun. 30, 2013 - USD ($) shares in Thousands, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2012	$ 6,675	$ 6	$ 4,549	$ 6,879	$ 193	$ (5,273)	$ 321
Beginning balance, shares at Dec. 31, 2012		630,282				(166,062)
Consolidated net income	432			412			20
Other comprehensive income (loss), net of taxes	(59)				(59)
Cash dividends declared	(341)			(341)
Equity-based compensation transactions, including dividend equivalents, net of taxes	144		21	(2)		$ 125
Equity-based compensation transactions, including dividend equivalents, net of taxes, shares						3,921
Distributions paid to noncontrolling interests	(32)						(32)
Other	(1)		(1)
Other, shares						3
Ending balance at Jun. 30, 2013	$ 6,818	$ 6	$ 4,569	$ 6,948	$ 134	$ (5,148)	$ 309
Ending balance, shares at Jun. 30, 2013		630,282				(162,138)

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The financial statements presented in this report represent the consolidation of Waste Management, Inc., a Delaware corporation; Waste Management’s wholly-owned and majority-owned subsidiaries; and certain variable interest entities for which Waste Management or its subsidiaries are the primary beneficiary as described in Note 14. Waste Management is a holding company and all operations are conducted by its subsidiaries. When the terms “the Company,” “we,” “us” or “our” are used in this document, those terms refer to Waste Management, Inc., its consolidated subsidiaries and consolidated variable interest entities. When we use the term “WM,” we are referring only to Waste Management, Inc., the parent holding company. We are North America’s leading provider of comprehensive waste management environmental services. We partner with our residential, commercial, industrial and municipal customers and the communities we serve to manage and reduce waste at each stage from collection to disposal, while recovering valuable resources and creating clean, renewable energy. Our “Solid Waste” business is operated and managed locally by our subsidiaries that focus on distinct geographic areas and provides collection, transfer, recycling and resource recovery, and disposal services. Through our subsidiaries, we are also a leading developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. Through the third quarter of 2012, the operations of our local subsidiaries were primarily organized under our Eastern, Midwest, Southern, Western and Wheelabrator operating Groups. In July 2012, we announced a reorganization of our operations, designed to streamline management and staff support and reduce our cost structure, while not disrupting our front-line operations. Principal organizational changes included removing the management layer of our four geographic Groups, each of which previously constituted a reportable segment, and consolidating and reducing the number of geographic Areas from 22 to 17. Following our reorganization, our senior management now evaluates, oversees and manages the financial performance of our Solid Waste business subsidiaries through these 17 Areas. Our reportable segments have been realigned to conform with our new organizational structure. Our Wheelabrator business provides waste-to-energy services and manages waste-to-energy facilities and independent power production plants. We also provide additional services that are not managed through our Solid Waste or Wheelabrator businesses, including our strategic accounts program that expanded with the acquisition of Oakleaf Global Holdings on July 28, 2011 (“Oakleaf”), which are presented in this report as “Other.” Additional information related to our segments can be found in Note 8. The Condensed Consolidated Financial Statements as of June 30, 2013 and for the three and six months ended June 30, 2013 and 2012 are unaudited. In the opinion of management, these financial statements include all adjustments, which, unless otherwise disclosed, are of a normal recurring nature, necessary for a fair presentation of the financial position, results of operations, comprehensive income, cash flows, and changes in equity for the periods presented. The results for interim periods are not necessarily indicative of results for the entire year. The financial statements presented herein should be read in connection with the financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2012. In preparing our financial statements, we make numerous estimates and assumptions that affect the accounting for and recognition and disclosure of assets, liabilities, equity, revenues and expenses. We must make these estimates and assumptions because certain information that we use is dependent on future events, cannot be calculated with a high degree of precision from data available or simply cannot be readily calculated. In some cases, these estimates are particularly difficult to determine and we must exercise significant judgment. In preparing our financial statements, the most difficult, subjective and complex estimates and the assumptions that present the greatest amount of uncertainty relate to our accounting for landfills, environmental remediation liabilities, asset impairments, deferred income taxes and reserves associated with our insured and self-insured claims. Actual results could differ materially from the estimates and assumptions that we use in the preparation of our financial statements. *Adoption of New Accounting Pronouncement* Comprehensive Income — In February 2013, the Financial Accounting Standards Board issued amended authoritative guidance associated with comprehensive income, which requires companies to provide information about the amounts that are reclassified out of accumulated other comprehensive income by component. Additionally, companies are required to present significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. The amendment to authoritative guidance associated with comprehensive income was effective for the Company on January 1, 2013. The adoption of this guidance did not have a material impact on our consolidated financial statements. We have presented the information required by this amendment in Note 12. *Reclassifications* Certain reclassifications have been made to our prior period consolidated financial information in order to conform to the current year presentation.

Landfill and Environmental Remediation Liabilities

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Landfill and Environmental Remediation Liabilities

2.	Landfill and Environmental Remediation Liabilities

Liabilities for landfill and environmental remediation costs are presented in the table below (in millions):


	June 30, 2013						December 31, 2012
	Landfill		Environmental Remediation		Total		Landfill		Environmental Remediation		Total
Current (in accrued liabilities)	$	103	$	29	$	132	$	104	$	28	$	132
Long-term		1,277		210		1,487		1,234		225		1,459

	$	1,380	$	239	$	1,619	$	1,338	$	253	$	1,591

The changes to landfill and environmental remediation liabilities for the year ended December 31, 2012 and the six months ended June 30, 2013 are reflected in the table below (in millions):


	Landfill			Environmental Remediation
December 31, 2011	$	1,292		$	273
Obligations incurred and capitalized		58			—
Obligations settled		(87	)		(30	)
Interest accretion		84			4
Revisions in cost estimates and interest rate assumptions		(8	)		5
Acquisitions, divestitures and other adjustments		(1	)		1

December 31, 2012		1,338			253
Obligations incurred and capitalized		29			—
Obligations settled		(28	)		(10	)
Interest accretion		43			2
Revisions in cost estimates and interest rate assumptions		—			(6	)
Acquisitions, divestitures and other adjustments		(2	)		—

June 30, 2013	$	1,380		$	239

At several of our landfills, we provide financial assurance by depositing cash into restricted trust funds or escrow accounts for purposes of settling final capping, closure, post-closure and environmental remediation obligations. Generally, these trust funds are established to comply with statutory requirements and operating agreements. See Note 14 for additional information related to these trusts.

Debt

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Debt

3. Debt

The following table summarizes the major components of debt at each balance sheet date (in millions) and provides the maturities and interest rate ranges of each major category as of June 30, 2013:


	June 30, 2013		December 31, 2012
$2.0 billion revolving credit facility, maturing May 2016 (weighted average interest rate of 1.4% at June 30, 2013 and December 31, 2012)	$	335	$	400
Letter of credit facilities, maturing through June 2015		—		—
Canadian credit facility, maturing November 2017 (weighted average effective interest rate of 2.7% at June 30, 2013 and 2.9% at December 31, 2012)		24		75
Senior notes and debentures, maturing through 2039, interest rates ranging from 2.60% to 7.75% (weighted average interest rate of 5.7% at June 30, 2013 and December 31, 2012)		6,296		6,305
Tax-exempt bonds, maturing through 2041, fixed and variable interest rates ranging from 0.1% to 6.0% (weighted average interest rate of 2.5% at June 30, 2013 and 2.8% at December 31, 2012)		2,659		2,727
Capital leases and other, maturing through 2055, interest rates up to 12%		456		409

		9,770		9,916
Current portion of long-term debt		776		743

	$	8,994	$	9,173

Debt Classification

As of June 30, 2013, we had (i) $902 million of debt maturing within the next 12 months, including $335 million of borrowings outstanding under the revolving credit facility, U.S.$24 million of advances outstanding under our Canadian credit facility, $350 million of 5.0% senior notes that mature in March 2014 and $110 million of tax-exempt bonds and (ii) $577 million of tax-exempt borrowings subject to repricing within the next 12 months. Based on our intent and ability to refinance a portion of this debt on a long-term basis as of June 30, 2013, we have classified $703 million of this debt as long-term and the remaining $776 million as current obligations.

Revolving Credit and Letter of Credit Facilities

As of June 30, 2013, we had an aggregate committed capacity of $2.4 billion for letters of credit under various credit facilities. Our $2.0 billion revolving credit facility is our primary source of letter of credit capacity. As of June 30, 2013, we had an aggregate of $1.4 billion of letters of credit outstanding under various credit facilities. Approximately $961 million of these letters of credit have been issued under our revolving credit facility. We had $335 million of outstanding borrowings under our revolving credit facility as of June 30, 2013, leaving $704 million of unused and available capacity.

In July 2013, we amended and restated our $2.0 billion revolving credit facility, increasing our total credit capacity to $2.25 billion and extending the term through July 2018.

Significant Changes in Debt Balances

Net Debt Repayments — We had net debt repayments of $197 million during the six months ended June 30, 2013, largely attributable to (i) $65 million of net repayments under our revolving credit facility; (ii) U.S.$50 million of repayments of net advances under our Canadian credit facility; and (iii) the repayment of $67 million of tax-exempt bonds.

Other — We had increases in our other obligations during the six months ended June 30, 2013, primarily related to the deferred purchase price of (i) land needed to support a landfill expansion and (ii) Greenstar, LLC, which is discussed further in Note 9.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Derivative Instruments and Hedging Activities

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

4. Derivative Instruments and Hedging Activities

The following table summarizes the fair values of derivative instruments recorded in our Condensed Consolidated Balance Sheet (in millions):


Derivatives Designated as Hedging Instruments	Balance Sheet Location	June 30, 2013		December 31, 2012
Foreign currency derivatives	Current other assets	$	8	$	—
Electricity commodity derivatives	Current other assets		—		1

Total derivative assets		$	8	$	1

Interest rate derivatives	Current accrued liabilities	$	30	$	—
Electricity commodity derivatives	Current accrued liabilities		4		5
Foreign currency derivatives	Current accrued liabilities		—		11
Interest rate derivatives	Long-term other liabilities		—		42

Total derivative liabilities		$	34	$	58

We have not offset fair value amounts recognized for our derivative instruments. For information related to the inputs used to measure our derivative assets and liabilities at fair value, refer to Note 13.

Fair Value Hedges

Interest Rate Swaps

In prior years, we used interest rate swaps to maintain a portion of our debt obligations at variable market interest rates. As of June 30, 2013 and December 31, 2012, we did not have any of these swaps outstanding. In April 2012, we elected to terminate our interest rate swaps related to the interest payments on $1 billion of our senior notes and, upon termination, we received $76 million in cash for their fair value plus accrued interest receivable. The terminated interest rate swaps were associated with senior notes with maturities between November 2012 and 2018. The associated fair value adjustments to long-term debt are being amortized as a reduction to interest expense over the remaining terms of the underlying debt using the effective interest method.

We designated our interest rate swaps as fair value hedges of our fixed-rate senior notes. Fair value hedge accounting for interest rate swap contracts increased the carrying value of our debt instruments by $69 million as of June 30, 2013 and $79 million as of December 31, 2012, representing the unamortized portion of our terminated swaps.

We recognize the impacts of (i) net periodic settlements of current interest on our active interest rate swaps, if any, and (ii) the amortization of previously terminated interest rate swap agreements as adjustments to interest expense. The following table summarizes the impact of periodic settlements of active swap agreements and the impact of terminated swap agreements on our results of operations (in millions):


	Three Months Ended June 30,				Six Months Ended June 30,
Decrease to Interest Expense Due to Hedge Accounting for Interest Rate Swaps	2013		2012		2013		2012
Periodic settlements of active swap agreements(a)	$	—	$	2	$	—	$	7
Terminated swap agreements		5		7		10		9

	$	5	$	9	$	10	$	16

(a)

These amounts represent the net of our periodic variable-rate interest obligations and the swap counterparties’ fixed-rate interest obligations. Our variable-rate obligations were based on a spread from the three-month LIBOR. Periodic settlements of active swap agreements have decreased due to our election to terminate our interest rate swap portfolio with a notional amount of $1 billion in April 2012.

Cash Flow Hedges

Forward-Starting Interest Rate Swaps

In prior years, we entered into forward-starting interest rate swaps with a total notional value of $525 million to hedge the risk of changes in semi-annual interest payments due to fluctuations in the forward ten-year LIBOR swap rate for anticipated fixed-rate debt issuances in 2011, 2012 and 2014. We designated these forward-starting interest rate swaps as cash flow hedges.

During the third quarter of 2012, $200 million of these forward-starting interest rate swaps were terminated contemporaneously with the actual issuance of senior notes in September 2012, and we paid cash of $59 million to settle the liabilities related to these swap agreements. The ineffectiveness recognized upon termination of these hedges was immaterial. At June 30, 2013 and December 31, 2012, our “Accumulated other comprehensive income” included $36 million and $39 million, respectively, of after-tax deferred losses related to all previously terminated swaps, which are being amortized as an increase to interest expense over the ten-year life of the related senior note issuances using the effective interest method. As of June 30, 2013, $7 million (on a pre-tax basis) is scheduled to be reclassified as an increase to interest expense over the next 12 months.

The active forward-starting interest rate swaps outstanding as of June 30, 2013 relate to an anticipated debt issuance to repay the $350 million of 5.0% senior notes that mature in March 2014. As of June 30, 2013, the fair value of these active interest rate derivatives was comprised of $30 million of current liabilities compared with $42 million of long-term liabilities as of December 31, 2012.

Treasury Rate Locks

As of both June 30, 2013 and December 31, 2012, our “Accumulated other comprehensive income” included $7 million of after-tax deferred losses associated with Treasury rate locks that had been executed in previous years in anticipation of senior note issuances. These deferred losses are reclassified as an increase to interest expense over the life of the related senior note issuances, which extend through 2032. As of June 30, 2013, $2 million (on a pre-tax basis) is scheduled to be reclassified as an increase to interest expense over the next 12 months.

Foreign Currency Derivatives

We use foreign currency exchange rate derivatives to hedge our exposure to fluctuations in exchange rates for anticipated intercompany cash transactions between WM Holdings and one of its Canadian subsidiaries. As of June 30, 2013, we had foreign currency forward contracts outstanding for all of the anticipated cash flows associated with a debt arrangement between these wholly-owned subsidiaries. The hedged cash flows as of June 30, 2013 include C$370 million of principal and C$10 million of interest which are scheduled to be repaid on October 31, 2013. We designated these forward contracts as cash flow hedges. Gains or losses on the underlying hedged items attributable to foreign currency exchange risk are recognized in current earnings.

Electricity Commodity Derivatives

We use “receive fixed, pay variable” electricity commodity swaps to reduce the variability in our revenues and cash flows caused by fluctuations in the market prices for electricity. We hedged 628,800 megawatt hours, or approximately 20%, of Wheelabrator’s full year 2012 merchant electricity sales and the swaps executed through June 30, 2013 are expected to hedge about 1.75 million megawatt hours, or approximately 55%, of Wheelabrator’s full year 2013 merchant electricity sales. For the three-month periods ended June 30, 2013 and 2012, we hedged 56% and 16%, respectively, of our merchant electricity sales. For the six-month periods ended June 30, 2013 and 2012, we hedged 54% and 24%, respectively, of our merchant electricity sales.

Amounts reported in other comprehensive income and accumulated other comprehensive income are reported net of tax. The following table summarizes the pre-tax impacts of our cash flow derivatives on our comprehensive income and results of operations (in millions):


	Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)						Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
	Three Months Ended June 30,					Statement of Operations Classification	Three Months Ended June 30,
Derivatives Designated as Cash Flow Hedges	2013		2012			Statement of Operations Classification	2013			2012
Forward-starting interest rate swaps	$	10	$	(30	)	Interest expense	$	(2	)	$	—
Treasury rate locks		—		—		Interest expense		(1	)		(2	)
Foreign currency derivatives		12		6		Other, net		11			6
Electricity commodity derivatives		4		(2	)	Operating revenues		(1	)		2

	$	26	$	(26	)		$	7		$	6


	Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)							Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
	Six Months Ended June 30,						Statement of Operations Classification	Six Months Ended June 30,
Derivatives Designated as Cash Flow Hedges	2013			2012			Statement of Operations Classification	2013			2012
Forward-starting interest rate swaps	$	12		$	(25	)	Interest expense	$	(4	)	$	—
Treasury rate locks		—			—		Interest expense		(1	)		(4	)
Foreign currency derivatives		19			1		Other, net		19			(3	)
Electricity commodity derivatives		(6	)		4		Operating revenues		(6	)		7

	$	25		$	(20	)		$	8		$	—

There was no significant ineffectiveness associated with our cash flow hedges during the three and six months ended June 30, 2013 or 2012.

Credit-Risk-Related Contingent Features

Our interest rate derivative instruments have in the past, and may in the future, contain provisions related to the Company’s credit rating. These provisions generally provide that if the Company’s credit rating were to fall to specified levels below investment grade, the counterparties have the ability to terminate the derivative agreements, resulting in settlement of all affected transactions. As of June 30, 2013 and December 31, 2012, we did not have any interest rate derivatives outstanding that contained these credit-risk-related features.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
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+ Details

Income Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes

5.	Income Taxes

Our effective income tax rate for the three and six months ended June 30, 2013 was 33.2% and 33.0%, respectively, compared with 34.3% and 33.6%, respectively, for the comparable prior year periods. We evaluate our effective income tax rate at each interim period and adjust it as facts and circumstances warrant. The differences between federal income taxes computed at the federal statutory rate and reported income taxes for the reported periods were primarily due to the favorable impact of federal and state tax credits and tax audit settlements offset in part by the unfavorable impact of state and local income taxes.

Investment in Refined Coal Facility — In January 2011, we acquired a noncontrolling interest in a limited liability company, which was established to invest in and manage a refined coal facility in North Dakota. The facility’s refinement processes qualify for federal tax credits that are expected to be realized through 2019 in accordance with Section 45 of the Internal Revenue Code.

We account for our investment in this entity using the equity method of accounting, recognizing our share of the entity’s results and other reductions in “Equity in net losses of unconsolidated entities,” within our Condensed Consolidated Statements of Operations. During the three and six months ended June 30, 2013, we recognized $2 million and $3 million of net losses resulting from our share of the entity’s operating losses and $1 million and $2 million during the three and six months ended June 30, 2012. Our tax provision for the three and six months ended June 30, 2013 was reduced by $6 million and $9 million, respectively, primarily as a result of tax credits realized from this investment and by $5 million and $8 million for the three and six months ended June 30, 2012, respectively. See Note 14 for additional information related to this investment.

Investment in Federal Low-Income Housing Tax Credits — In April 2010, we acquired a noncontrolling interest in a limited liability company established to invest in and manage low-income housing properties. The entity’s low-income housing investments qualify for federal tax credits that are expected to be realized through 2020 in accordance with Section 42 of the Internal Revenue Code.

We account for our investment in this entity using the equity method of accounting. We recognize our share of the entity’s results and reductions in the value of our investment in “Equity in net losses of unconsolidated entities,” within our Condensed Consolidated Statements of Operations. The value of our investment decreases as the tax credits are generated and utilized. During the three and six months ended June 30, 2013, we recognized $6 million and $12 million of losses relating to our equity investment in this entity, $2 million and $3 million of interest expense, and a reduction in our tax provision of $10 million (including $7 million of tax credits) and $17 million (including $11 million of tax credits), respectively. During the three and six months ended June 30, 2012, we recognized $6 million and $12 million of losses relating to our equity investment in this entity, $2 million and $3 million of interest expense, and a reduction in our tax provision of $9 million (including $6 million of tax credits) and $16 million (including $10 million of tax credits), respectively. See Note 14 for additional information related to this investment.

Recent Legislation — The American Taxpayer Relief Act of 2012 was signed into law on January 2, 2013 and includes an extension for one year of the bonus depreciation allowance. As a result, 50% of qualifying capital expenditures on property placed in service before January 1, 2014 can be depreciated immediately. The acceleration of deductions on 2013 qualifying capital expenditures resulting from the bonus depreciation provision will have no impact on our 2013 effective tax rate although it will reduce our cash taxes.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 136, 172
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

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+ Details

Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

6.	Earnings Per Share

Basic and diluted earnings per share were computed using the following common share data (shares in millions):


	Three Months Ended June 30,					Six Months Ended June 30,
	2013			2012		2013			2012
Number of common shares outstanding at end of period		468.1			463.0		468.1			463.0
Effect of using weighted average common shares outstanding		(0.2	)		0.4		(1.3	)		(0.1	)

Weighted average basic common shares outstanding		467.9			463.4		466.8			462.9
Dilutive effect of equity-based compensation awards and other contingently issuable shares		1.5			0.6		1.3			0.8

Weighted average diluted common shares outstanding		469.4			464.0		468.1			463.7

Potentially issuable shares		13.6			17.1		13.6			17.1
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding		1.2			10.3		3.2			10.3

Commitments and Contingencies

6 Months Ended

Jun. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

7.	Commitments and Contingencies

Financial Instruments — We have obtained letters of credit, performance bonds and insurance policies and have established trust funds and issued financial guarantees to support tax-exempt bonds, contracts, performance of landfill final capping, closure and post-closure requirements, environmental remediation, and other obligations. Letters of credit generally are supported by our revolving credit facility and other credit facilities established for that purpose. We obtain surety bonds and insurance policies from an entity in which we have a noncontrolling financial interest. We also obtain insurance from a wholly-owned insurance company, the sole business of which is to issue policies for us. In those instances where our use of financial assurance from entities we own or have financial interests in is not allowed, we have available alternative financial assurance mechanisms.

Management does not expect that any claims against or draws on these instruments would have a material adverse effect on our consolidated financial statements. We have not experienced any unmanageable difficulty in obtaining the required financial assurance instruments for our current operations. In an ongoing effort to mitigate risks of future cost increases and reductions in available capacity, we continue to evaluate various options to access cost-effective sources of financial assurance.

Insurance — We carry insurance coverage for protection of our assets and operations from certain risks including automobile liability, general liability, real and personal property, workers’ compensation, directors’ and officers’ liability, pollution legal liability and other coverages we believe are customary to the industry. Our exposure to loss for insurance claims is generally limited to the per incident deductible under the related insurance policy. Our exposure, however, could increase if our insurers are unable to meet their commitments on a timely basis.

We have retained a significant portion of the risks related to our automobile, general liability and workers’ compensation claims programs. “General liability” refers to the self-insured portion of specific third party claims made against us that may be covered under our commercial General Liability Insurance Policy. For our self-insured retentions, the exposure for unpaid claims and associated expenses, including incurred but not reported losses, is based on an actuarial valuation and internal estimates. The accruals for these liabilities could be revised if future occurrences or loss development significantly differ from our assumptions. We do not expect the impact of any known casualty, property, environmental or other contingency to have a material impact on our financial condition, results of operations or cash flows.

Guarantees — In the ordinary course of our business, WM and WM Holdings enter into guarantee agreements associated with their subsidiaries’ operations. Additionally, WM and WM Holdings have each guaranteed all of the senior debt of the other entity. No additional liabilities have been recorded for these intercompany guarantees because all of the underlying obligations are reflected in our Condensed Consolidated Balance Sheets.

We also have guaranteed the obligations and certain performance requirements of, and provided indemnification to, third parties for both consolidated and unconsolidated entities. Guarantee agreements outstanding as of June 30, 2013 include (i) guarantees of unconsolidated entities’ financial obligations maturing through 2020 for maximum future payments of $10 million; and (ii) agreements guaranteeing certain market value losses for approximately 850 homeowners’ properties adjacent to or near 20 of our landfills. Our indemnification obligations generally arise from divestitures and provide that we will be responsible for liabilities associated with our operations for events that occurred prior to the sale of the operations. Additionally, under certain of our acquisition agreements, we have provided for additional consideration to be paid to the sellers if established financial targets or other market conditions are achieved post-closing and we have recognized liabilities for these contingent obligations based on an estimate of the fair value of these contingencies at the time of acquisition. We do not currently believe that contingent obligations to provide indemnification or pay additional post-closing consideration in connection with our divestitures or acquisitions will have a material adverse effect on the Company’s business, financial condition, results of operations or cash flows.

Environmental Matters — A significant portion of our operating costs and capital expenditures could be characterized as costs of environmental protection as we are subject to an array of laws and regulations relating to the protection of the environment. Under current laws and regulations, we may have liabilities for environmental damage caused by our operations, or for damage caused by conditions that existed before we acquired a site. In addition to remediation activity required by state or local authorities, such liabilities include potentially responsible party, or PRP, investigations. The costs associated with these liabilities can include settlements, certain legal and consultant fees, as well as incremental internal and external costs directly associated with site investigation and clean-up.

Estimating our degree of responsibility for remediation is inherently difficult. We recognize and accrue for an estimated remediation liability when we determine that such liability is both probable and reasonably estimable. Determining the method and ultimate cost of remediation requires that a number of assumptions be made. There can sometimes be a range of reasonable estimates of the costs associated with the likely site remediation alternatives identified in the investigation of the extent of environmental impact. In these cases, we use the amount within the range that constitutes our best estimate. If no amount within a range appears to be a better estimate than any other, we use the amount that is the low end of such range. If we used the high ends of such ranges, our aggregate potential liability would be approximately $145 million higher than the $239 million recorded in the Condensed Consolidated Financial Statements as of June 30, 2013. Our ultimate responsibility may differ materially from current estimates. It is possible that technological, regulatory or enforcement developments, the results of environmental studies, the inability to identify other PRPs, the inability of other PRPs to contribute to the settlements of such liabilities, or other factors could require us to record additional liabilities. Our ongoing review of our remediation liabilities, in light of relevant internal and external facts and circumstances, could result in revisions to our accruals that could cause upward or downward adjustments to income from operations. These adjustments could be material in any given period.

As of June 30, 2013, we had been notified by the government that we are a PRP in connection with 80 locations listed on the EPA’s Superfund National Priorities List, or NPL. Of the 80 sites at which claims have been made against us, 15 are sites we own. Each of the NPL sites we own was initially developed by others as a landfill disposal facility. At each of these facilities, we are working in conjunction with the government to evaluate or remediate identified site problems, and we have either agreed with other legally liable parties on an arrangement for sharing the costs of remediation or are working toward a cost-sharing agreement. We generally expect to receive any amounts due from other participating parties at or near the time that we make the remedial expenditures. The other 65 NPL sites, which we do not own, are at various procedural stages under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, known as CERCLA or Superfund.

The majority of these proceedings involving NPL sites that we do not own are based on allegations that certain of our subsidiaries (or their predecessors) transported hazardous substances to the sites, often prior to our acquisition of these subsidiaries. CERCLA generally provides for liability for those parties owning, operating, transporting to or disposing at the sites. Proceedings arising under Superfund typically involve numerous waste generators and other waste transportation and disposal companies and seek to allocate or recover costs associated with site investigation and remediation, which costs could be substantial and could have a material adverse effect on our consolidated financial statements. At some of the sites at which we have been identified as a PRP, our liability is well defined as a consequence of a governmental decision and an agreement among liable parties as to the share each will pay for implementing that remedy. At other sites, where no remedy has been selected or the liable parties have been unable to agree on an appropriate allocation, our future costs are uncertain.

Item 103 of the SEC’s Regulation S-K requires disclosure of certain environmental matters when a governmental authority is a party to the proceedings, or such proceedings are known to be contemplated, unless we reasonably believe that the matter will result in no monetary sanctions, or in monetary sanctions, exclusive of interest and costs, of less than $100,000. The following matter is disclosed in accordance with that requirement. We do not currently believe that the eventual outcome of such matter could have a material adverse effect on the Company’s business, financial condition, results of operations or cash flows.

On December 22, 2011, the Harris County Attorney in Houston, Texas filed suit against McGinnes Industrial Maintenance Corporation (“MIMC”), WM and Waste Management of Texas, Inc., et. al, seeking civil penalties and attorneys’ fees for alleged violations of the Texas Water Code and the Texas Health and Safety Code. The County’s Original Petition pending in the District Court of Harris County, Texas alleges the mismanagement of certain waste pits that were operated from 1965 to 1966 by MIMC. In 1998, a predecessor of WM acquired the stock of the parent entity of MIMC.

Additionally, the United States Attorney’s Office for the District of Hawaii has been conducting an investigation prompted by allegations of violations of the federal Clean Water Act involving discharge of stormwater at the Waimanalo Gulch Sanitary Landfill, located on Oahu, in connection with three major storm events in December 2010 and January 2011. No formal enforcement action has been brought against the Company. While we could potentially be subject to sanctions, including requirements to pay monetary penalties, in connection with a future proceeding that may arise from the investigation, a range of loss cannot currently be estimated because no proceeding has yet commenced and significant factual and legal issues remain. We are cooperating with the U.S. Attorney’s Office.

Litigation — In October 2011 and January 2012, we were named as a defendant in a purported class action in the Circuit Court of Sarasota County, Florida and the Circuit Court of Lawrence County Alabama, respectively. These cases primarily pertain to our fuel and environmental charges included on our invoices, generally alleging that such charges were not properly disclosed, were unfair and were contrary to the customer service contracts. The law firm that filed these lawsuits had filed, in 2008, a purported class action against subsidiaries of WM in Bullock County, Alabama, making similar allegations. The prior Alabama suit was removed to federal court, where the federal court ultimately dismissed the plaintiffs’ national class action claims. The plaintiffs then elected to dismiss the case without prejudice. We will vigorously defend against these pending lawsuits. Given the inherent uncertainties of litigation, including the early stage of these cases, the unknown size of any potential class, and legal and factual issues in dispute, the outcome of these cases cannot be predicted and a range of loss cannot currently be estimated.

From time to time, we are also named as defendants in personal injury and property damage lawsuits, including purported class actions, on the basis of having owned, operated or transported waste to a disposal facility that is alleged to have contaminated the environment or, in certain cases, on the basis of having conducted environmental remediation activities at sites. Some of the lawsuits may seek to have us pay the costs of monitoring of allegedly affected sites and health care examinations of allegedly affected persons for a substantial period of time even where no actual damage is proven. While we believe we have meritorious defenses to these lawsuits, the ultimate resolution is often substantially uncertain due to the difficulty of determining the cause, extent and impact of alleged contamination (which may have occurred over a long period of time), the potential for successive groups of complainants to emerge, the diversity of the individual plaintiffs’ circumstances, and the potential contribution or indemnification obligations of co-defendants or other third parties, among other factors. Additionally, we often enter into contractual arrangements with landowners imposing obligations on us to meet certain regulatory or contractual conditions upon site closure or upon termination of the agreements. Compliance with these arrangements is inherently subject to subjective determinations and may result in disputes, including litigation.

As a large company with operations across the United States and Canada, we are subject to various proceedings, lawsuits, disputes and claims arising in the ordinary course of our business. Many of these actions raise complex factual and legal issues and are subject to uncertainties. Actions filed against us include commercial, customer, and employment-related claims, including purported class action lawsuits related to our sales and marketing practices and our customer service agreements and purported class actions involving federal and state wage and hour and other laws. The plaintiffs in some actions seek unspecified damages or injunctive relief, or both. These actions are in various procedural stages, and some are covered in part by insurance. We currently do not believe that the eventual outcome of any such actions could have a material adverse effect on the Company’s business, financial condition, results of operations, or cash flows.

WM’s charter and bylaws provide that WM shall indemnify against all liabilities and expenses, and upon request shall advance expenses to, any person who is subject to a pending or threatened proceeding because such person is a director or officer of the Company. Such indemnification is required to the maximum extent permitted under Delaware law. Accordingly, the director or officer must execute an undertaking to reimburse the Company for any fees advanced if it is later determined that the director or officer was not entitled to have such fees advanced under Delaware law. Additionally, WM has entered into separate indemnification agreements with each of the members of its Board of Directors, its Chief Executive Officer and each of its executive vice presidents. The employment agreements between WM and its Chief Executive Officer and other executive and senior vice presidents also contain a direct contractual obligation of the Company to provide indemnification to the executive. The Company may incur substantial expenses in connection with the fulfillment of its advancement of costs and indemnification obligations in connection with current actions involving former officers of the Company or its subsidiaries or other actions or proceedings that may be brought against its former or current officers, directors and employees.

Multiemployer Defined Benefit Pension Plans — About 20% of our workforce is covered by collective bargaining agreements with various union locals across the United States and Canada. As a result of some of these agreements, certain of our subsidiaries are participating employers in a number of trustee-managed multiemployer defined benefit pension plans for the affected employees. In connection with our ongoing renegotiation of various collective bargaining agreements, we may discuss and negotiate for the complete or partial withdrawal from one or more of these pension plans. A complete or partial withdrawal from a multiemployer pension plan may also occur if employees covered by a collective bargaining agreement vote to decertify a union from continuing to represent them.

One of the most significant multiemployer pension plans in which we have participated is the Central States, Southeast and Southwest Areas Pension Plan (“Central States Pension Plan”). The Central States Pension Plan is in “critical status,” as defined by the Pension Protection Act of 2006. Since 2008, certain of our affiliates have bargained to remove covered employees from the Central States Pension Plan, resulting in a series of withdrawals, and we have recognized charges to “Operating” expense associated with the withdrawal of certain bargaining units from the Central States Pension Plan and other underfunded multiemployer pension plans. In October 2011, employees at the last of our affiliates with active participants in the Central States Pension Plan voted to decertify the union that represented them, withdrawing themselves from the Central States Pension Plan.

We are still negotiating and litigating final resolutions of our withdrawal liability for certain previous withdrawals. Except in the case of our withdrawals from the Central States Pension Plan, we do not believe any additional liability above the charges we have already recognized for such previous withdrawals could be material to the Company’s business, financial condition, liquidity, results of operations or cash flows. In addition to charges recognized in prior years, we currently estimate that we could incur up to approximately $40 million in future charges based on demands from representatives of the Central States Pension Plan. As a result, we do not anticipate that the final resolution of the Central States Pension Plan matter could be material to the Company’s business, financial condition or liquidity; however, such loss could have a material adverse effect on our cash flows and, to a lesser extent, our results of operations, for a particular reporting period. Similarly, we also do not believe that any future withdrawals, individually or in the aggregate, from the multiemployer pension plans to which we contribute, could have a material adverse effect on our business, financial condition or liquidity. However, such withdrawals could have a material adverse effect on our results of operations or cash flows for a particular reporting period, depending on the number of employees withdrawn in any future period and the financial condition of the multiemployer pension plan(s) at the time of such withdrawal(s).

Tax Matters — We are currently in the examination phase of IRS audits for the tax years 2012 and 2013 and expect these audits to be completed within the next nine and 21 months, respectively. We participate in the IRS’s Compliance Assurance Process, which means we work with the IRS throughout the year in order to resolve any material issues prior to the filing of our annual tax return. We are also currently undergoing audits by various state and local jurisdictions that date back to 2000. We are not currently under audit in Canada and, due to the expiration of statutes of limitations, all tax years prior to 2008 are closed. Oakleaf is subject to potential IRS examinations for years dating back to 2009. Pursuant to the terms of our acquisition of Oakleaf, we are entitled to indemnification for Oakleaf’s pre-acquisition period tax liabilities. We maintain a liability for uncertain tax positions, the balance of which management believes is adequate. Results of audit assessments by taxing authorities are not currently expected to have a material adverse impact on our results of operations or cash flows.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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+ Details

Segment and Related Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment and Related Information

8.	Segment and Related Information

In July 2012, we announced a reorganization of operations, designed to streamline management and staff support and reduce our cost structure, while not disrupting our front-line operations. Principal organizational changes included removing the management layer of our four geographic Groups, each of which previously constituted a reportable segment, and consolidating and reducing the number of our geographic Areas from 22 to 17.

Following our reorganization, our senior management now evaluates, oversees and manages the financial performance of our Solid Waste subsidiaries through these 17 Areas. The 17 Areas constitute our operating segments and none of the Areas individually meet the quantitative criteria to be a separate reportable segment. We considered the similarities between our Areas, including the fact that our Solid Waste business is homogenous across geography with the same services offered across the Areas, and we concluded that aggregation of our Areas is appropriate for purposes of presenting our reportable segments. Accordingly, we have aggregated our 17 Areas into three tiers that we believe have similar economic characteristics and future prospects based in large part on a review of the Areas’ operating margins. The economic variations experienced by our Areas is attributable to a variety of factors, including regulatory environment of the Area; economic environment of the Area, including level of commercial and industrial activity; population density; service offering mix and disposal logistics, with no one factor being singularly determinative of an Area’s current or future economic performance. As a result of our consideration of economic and other similarities, we have established the following three reportable segments for our Solid Waste business: Tier 1, which is comprised almost exclusively of Areas in the Southern United States; Tier 2, which is comprised predominately of Areas located in the Midwest and Northeast United States; and Tier 3, which encompasses all Areas not included in Tier 1 or Tier 2. Our Wheelabrator business, which manages waste-to-energy facilities and independent power production plants, continues to be a separate reportable segment as it meets one of the quantitative disclosure thresholds. The operating segments not evaluated and overseen through the 17 Areas and Wheelabrator are presented herein as “Other” as these operating segments do not meet the criteria to be aggregated with other operating segments and do not meet the quantitative criteria to be separately reported.

Summarized financial information concerning our reportable segments for the three and six months ended June 30 is shown in the following table (in millions):


	Gross Operating Revenues		Intercompany Operating Revenues			Net Operating Revenues		Income from Operations
Three Months Ended:
June 30, 2013
Solid Waste:
Tier 1	$	891	$	(144	)	$	747	$	221
Tier 2		1,641		(313	)		1,328		325
Tier 3		871		(139	)		732		131
Wheelabrator		215		(27	)		188		4
Other		554		(23	)		531		(27	)

		4,172		(646	)		3,526		654
Corporate and Other		—		—			—		(144	)

Total	$	4,172	$	(646	)	$	3,526	$	510

June 30, 2012
Solid Waste:
Tier 1	$	851	$	(132	)	$	719	$	219
Tier 2		1,595		(277	)		1,318		318
Tier 3		856		(131	)		725		129
Wheelabrator		206		(32	)		174		17
Other		544		(21	)		523		(64	)

		4,052		(593	)		3,459		619
Corporate and Other		—		—			—		(153	)

Total	$	4,052	$	(593	)	$	3,459	$	466

Six Months Ended:
June 30, 2013
Solid Waste:
Tier 1	$	1,734	$	(277	)	$	1,457	$	428
Tier 2		3,157		(588	)		2,569		623
Tier 3		1,697		(267	)		1,430		240
Wheelabrator		420		(54	)		366		13
Other		1,088		(48	)		1,040		(68	)

		8,096		(1,234	)		6,862		1,236
Corporate and Other		—		—			—		(324	)

Total	$	8,096	$	(1,234	)	$	6,862	$	912

June 30, 2012
Solid Waste:
Tier 1	$	1,677	$	(248	)	$	1,429	$	428
Tier 2		3,102		(515	)		2,587		618
Tier 3		1,661		(244	)		1,417		244
Wheelabrator		413		(62	)		351		22
Other		1,012		(42	)		970		(99	)

		7,865		(1,111	)		6,754		1,213
Corporate and Other		—		—			—		(346	)

Total	$	7,865	$	(1,111	)	$	6,754	$	867

Fluctuations in our operating results may be caused by many factors, including period-to-period changes in the relative contribution of revenue by each line of business, changes in commodity prices and by general economic conditions. In addition, our revenues and income from operations typically reflect seasonal patterns. Our operating revenues tend to be somewhat higher in the summer months, primarily due to the higher volume of construction and demolition waste. The volumes of industrial and residential waste in certain regions where we operate also tend to increase during the summer months. Our second and third quarter revenues and results of operations typically reflect these seasonal trends.

Additionally, certain destructive weather conditions that tend to occur during the second half of the year, such as the hurricanes that most often impact our operations in the Southern and Eastern U.S., can actually increase our revenues in the areas affected. While weather-related and other “one-time” occurrences can boost revenues through additional work for a limited time span, as a result of significant start-up costs and other factors, such revenue sometimes generates earnings at comparatively lower margins. Certain weather conditions, including severe winter storms, may result in the temporary suspension of our operations, which can significantly affect the operating results of the affected regions. The operating results of our first quarter also often reflect higher repair and maintenance expenses because we rely on the slower winter months, when waste flows are generally lower, to perform scheduled maintenance at our waste-to-energy facilities.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Acquisitions	6 Months Ended
Acquisitions	Jun. 30, 2013
Business Combinations [Abstract]
Acquisitions	9. Acquisitions Greenstar, LLC — On January 31, 2013, we paid $170 million inclusive of certain adjustments, to acquire Greenstar, LLC (“Greenstar”). Pursuant to the sale and purchase agreement, up to an additional $40 million is payable to the sellers during the period from 2014 to 2018; a portion of this consideration is contingent based on changes in certain recyclable commodity indexes. This additional consideration had a preliminary estimated fair value at closing of $36 million. Greenstar is an operator of recycling and resource recovery facilities. This acquisition will provide the Company’s customers with greater access to recycling solutions by supplementing the Company’s extensive nationwide recycling network with the operations of one of the nation’s largest private recyclers. For the three and six months ended June 30, 2013, Greenstar recognized revenues of $40 million and $65 million, respectively, and net losses of $4 million and $7 million, respectively, which are included in our Condensed Consolidated Statements of Operations. The preliminary allocation of purchase price was primarily to “Other intangible assets,” consisting primarily of supplier relationships, which had an estimated fair value of $32 million; “Property and equipment,” which had an estimated fair value of $57 million; and “Goodwill” of $122 million. Goodwill is the result of synergies expected to be achieved from combining the operations of Greenstar with those of the Company. Goodwill has been assigned predominantly to our Areas and, to a lesser extent, our recycling brokerage services, as they are expected to benefit from the synergies of the combination. Goodwill related to this acquisition is deductible for income tax purposes. Adjustments to the preliminary allocation of the purchase price of Greenstar were immaterial for the three and six months ended June 30, 2013. Other — During the first half of 2013, we also paid approximately $40 million primarily to acquire seven businesses related to our collection and energy services operations. During the first half of 2012, we paid $94 million for interests in oil and gas producing properties through two transactions. The purchase price was allocated primarily to “Property and equipment.” Additionally, we acquired eight other businesses related to our collection and recycling operations in the first half of 2012.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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+ Details

Restructuring	6 Months Ended
Restructuring	Jun. 30, 2013
Restructuring And Related Activities [Abstract]
Restructuring	10. Restructuring During the first half of 2013, we recognized a total of $10 million of pre-tax restructuring charges, of which $3 million was related to employee severance and benefit costs, including costs associated with our acquisition of Greenstar and our 2012 restructuring. The remaining charges were primarily related to operating lease obligations for property that will no longer be utilized. During the first half of 2012, we recognized a total of $7 million of employee severance and benefit restructuring charges, including $3 million associated with the reorganization of Oakleaf and certain other actions taken by the Company. Through June 30, 2013, we had recognized charges of $77 million related to employee severance and benefits associated with our restructuring efforts beginning in 2011 and we have paid approximately $65 million of these costs. At June 30, 2013, we had approximately $9 million of accrued employee severance related to our restructuring efforts, which will be paid through the end of 2014.

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References + Details

Asset Impairments and Unusual Items	6 Months Ended
Asset Impairments and Unusual Items	Jun. 30, 2013
Extraordinary And Unusual Items [Abstract]
Asset Impairments and Unusual Items	11. Asset Impairments and Unusual Items *(Income) expense from divestitures, asset impairments and unusual items* During the first half of 2013, we recognized net charges of $15 million, primarily related to a $14 million impairment charge at a waste-to-energy facility as a result of projected operating losses. We wrote down the carrying value of the facility’s property, plant and equipment to its estimated fair value. Also included are (i) $6 million of losses on divestitures related to investments in oil and gas producing properties and (ii) $4 million of charges primarily to impair goodwill related to certain of our operations, which are included in our “Other” operations in Note 8. These charges were offset, in part, by gains on divestures of $9 million, largely attributable to the sale of a transfer station in our Greater Mid-Atlantic Area. During the first half of 2012, we recognized impairment charges of $34 million, relating primarily to two facilities in our medical waste services business as a result of projected operating losses at each of these facilities. We wrote down the carrying values of the facilities’ operating permits and property, plant and equipment to their estimated fair values. Our medical waste services business is included in our “Other” operations in Note 8. *Other income (expense)* During the first quarter of 2013, we recognized impairment charges of $11 million relating to other-than-temporary declines in the value of two investments in waste diversion technologies accounted for under the cost method. Partially offsetting these charges was a $4 million gain on the sale of a similar investment recognized in the second quarter of 2013. These net charges are recorded in “Other, net” in our Condensed Consolidated Statement of Operations.

Accumulated Other Comprehensive Income

6 Months Ended

Jun. 30, 2013

Equity [Abstract]

Accumulated Other Comprehensive Income

12.

Accumulated Other Comprehensive Income

The changes in the balances of each component of accumulated other comprehensive income, net of tax, which is included as a component of Waste Management, Inc. stockholders’ equity, are as follows (in millions):


	Six Months Ended June 30, 2013(a)
	Gains and Losses on Derivative Instruments			Unrealized Gains and Losses on Available- for-Sale Securities		Foreign Currency Translation Adjustments			Post- Retirement Benefit Plans			Total
Balance, December 31, 2012	$	(74	)	$	4	$	276		$	(13	)	$	193
Other comprehensive income (loss) before reclassifications		15			—		(69	)		—			(54	)
Amounts reclassified from accumulated other comprehensive income		(5	)		—		—			—			(5	)

Net current period other comprehensive income (loss)		10			—		(69	)		—			(59	)

Balance, June 30, 2013	$	(64	)	$	4	$	207		$	(13	)	$	134

(a)	Amounts in parentheses represent debits to accumulated other comprehensive income.

The significant amounts reclassified out of each component of accumulated other comprehensive income are as follows (in millions):


	Amount Reclassified from Accumulated Other Comprehensive Income(a)
Details about Accumulated Other Comprehensive Income Components	Three Months Ended June 30, 2013			Six Months Ended June 30, 2013			Statement of Operations Classification
Gains and losses on cash flow hedges:
Forward-starting interest rate swaps	$	(2	)	$	(4	)	Interest expense
Treasury rate locks		(1	)		(1	)	Interest expense
Foreign currency derivatives		11			19		Other, net
Electricity commodity derivatives		(1	)		(6	)	Operating revenues

	$	7		$	8		Total before tax

		(3	)		(3	)	Tax (expense) benefit

Total reclassifications for the period	$	4		$	5		Net of tax

(a)	Amounts in parentheses represent debits to the statement of operations classification.

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

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-URI http://asc.fasb.org/extlink&oid=6522872

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14-26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Fair Value Measurements

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

13.

Fair Value Measurements

Assets and Liabilities Accounted for at Fair Value

Our assets and liabilities that are measured at fair value on a recurring basis include the following (in millions):


			Fair Value Measurements at June 30, 2013 Using
	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)(a)
Assets:
Money market funds	$	58	$	58	$	—	$	—
Fixed-income securities		37		—		37		—
Redeemable preferred stock		25		—		—		25
Foreign currency derivatives		8		—		8		—

Total assets	$	128	$	58	$	45	$	25

Liabilities:
Interest rate derivatives	$	30	$	—	$	30	$	—
Electricity commodity derivatives		4		—		4		—

Total liabilities	$	34	$	—	$	34	$	—


			Fair Value Measurements at December 31, 2012 Using
	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)(a)
Assets:
Money market funds	$	127	$	127	$	—	$	—
Fixed-income securities		37		—		37		—
Redeemable preferred stock		25		—		—		25
Electricity commodity derivatives		1		—		1		—

Total assets	$	190	$	127	$	38	$	25

Liabilities:
Interest rate derivatives	$	42	$	—	$	42	$	—
Foreign currency derivatives		11		—		11		—
Electricity commodity derivatives		5		—		5		—

Total liabilities	$	58	$	—	$	58	$	—

(a)

Level 3 investments have been measured based on third-party investors’ recent or pending transactions in these securities, which are considered the best evidence of fair value currently available. When this evidence is not available, we use other valuation techniques as appropriate and available. These valuation methodologies may include transactions in similar instruments, discounted cash flow techniques, third-party appraisals or industry multiples and public comparables. There have not been any significant changes in the fair value of the redeemable preferred stock since our initial investment.

Fair Value of Debt

At June 30, 2013 and December 31, 2012, the carrying value of our debt was approximately $9.8 billion and $9.9 billion, respectively. The carrying value of our debt includes adjustments associated with fair value hedge accounting related to our interest rate swaps as discussed in Note 4.

The estimated fair value of our debt was approximately $10.5 billion at June 30, 2013 and approximately $11.3 billion at December 31, 2012. The estimated fair value of our senior notes is based on quoted market prices. The carrying value of remarketable debt and borrowings under our revolving credit facilities approximates fair value due to the short-term nature of the interest rates. The fair value of our other debt is estimated using discounted cash flow analysis, based on current market rates for similar types of instruments. The decrease in the fair value of our debt when comparing June 30, 2013 with December 31, 2012 is primarily related to recent increases in long-term interest rates, which have caused a decline in market prices for fixed-rate corporate debt securities.

Although we have determined the estimated fair value amounts using available market information and commonly accepted valuation methodologies, considerable judgment is required in interpreting market data to develop the estimates of fair value. Accordingly, our estimates are not necessarily indicative of the amounts that we, or holders of the instruments, could realize in a current market exchange. The use of different assumptions and/or estimation methodologies could have a material effect on the

estimated fair values. The fair value estimates are based on Level 2 inputs of the fair value hierarchy available as of June 30, 2013 and December 31, 2012. These amounts have not been revalued since those dates, and current estimates of fair value could differ significantly from the amounts presented.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 825
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-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13504-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Variable Interest Entities

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Variable Interest Entities

14.

Variable Interest Entities

Following is a description of our financial interests in variable interest entities that we consider significant, including (i) those for which we have determined that we are the primary beneficiary of the entity and, therefore, have consolidated the entities into our financial statements; and (ii) those that represent a significant interest in an unconsolidated entity.

Consolidated Variable Interest Entities

Waste-to-Energy LLCs — In June 2000, two limited liability companies were established to purchase interests in existing leveraged lease financings at three waste-to-energy facilities that we lease, operate and maintain. We own a 0.5% interest in one of the LLCs (“LLC I”) and a 0.25% interest in the second LLC (“LLC II”). John Hancock Life Insurance Company (“Hancock”) owns 99.5% of LLC I and 99.75% of LLC II is owned by LLC I and the CIT Group (“CIT”). In 2000, Hancock and CIT made an initial investment of $167 million in the LLCs, which was used to purchase the three waste-to-energy facilities and assume the seller’s indebtedness. Under the LLC agreements, the LLCs shall be dissolved upon the occurrence of any of the following events: (i) a written decision of all members of the LLCs; (ii) December 31, 2063; (iii) a court’s dissolution of the LLCs; or (iv) the LLCs ceasing to own any interest in the waste-to-energy facilities.

Income, losses and cash flows of the LLCs are allocated to the members based on their initial equity ownership percentages until Hancock and CIT achieve targeted returns on their initial capital investments in each respective LLC. All allocations made through June 30, 2013 have been based on initial equity ownership percentages as the target returns have not yet been achieved for either LLC. We currently expect Hancock and CIT to achieve their targeted return on LLC II in late 2013 and Hancock to receive its targeted return on LLC I in late 2014. After the investors have achieved their targeted returns, the LLC agreements provide that we will receive 80% of the earnings of each of the LLCs and Hancock and CIT will be allocated the remaining 20%.

Our obligations associated with our interests in the LLCs are primarily related to the lease of the facilities. In addition to our minimum lease payment obligations, we are required to make cash payments to the LLCs for differences between fair market rents and our minimum lease payments. These payments are subject to adjustment based on factors that include the fair market value of rents for the facilities and lease payments made through the re-measurement dates. In addition, we may also be required under certain circumstances to make capital contributions to the LLCs based on differences between the fair market value of the facilities and defined termination values as provided for in the underlying lease agreements, although we believe the likelihood of the occurrence of these circumstances is remote.

We have determined that we are the primary beneficiary of the LLCs and consolidate these entities in our Consolidated Financial Statements because (i) all of the equity owners of the LLCs are considered related parties for purposes of applying this accounting guidance; (ii) the equity owners share power over the significant activities of the LLCs; and (iii) we are the entity within the related party group whose activities are most closely associated with the LLCs.

As of June 30, 2013 and December 31, 2012, our Condensed Consolidated Balance Sheets included $290 million and $296 million, respectively, of net property and equipment associated with the LLCs’ waste-to-energy facilities and $244 million and $245 million, respectively, in noncontrolling interests associated with Hancock’s and CIT’s interests in the LLCs. We recognized reductions in consolidated earnings of $11 million and $22 million for the three and six months ended June 30, 2013, respectively, and $12 million and $25 million for the three and six months ended June 30, 2012, respectively, for Hancock’s and CIT’s noncontrolling interests in the LLCs’ earnings, which are included in our consolidated net income. The LLCs’ earnings relate to the rental income generated from leasing the facilities to our subsidiaries, reduced by depreciation expense. The LLCs’ rental income is eliminated in WM’s consolidation.

Significant Unconsolidated Variable Interest Entities

Investment in U.K. Waste-to-Energy and Recycling Entity — In the first quarter of 2012, we formed a U.K. joint venture (the “JV”), together with a commercial waste management company (“Partner”), to develop, construct, operate and maintain a waste-to-energy and recycling facility in England. We own a 50% interest in the JV. The total cost of constructing this facility is expected to be £200 million, or $304 million based on the exchange rate as of June 30, 2013. The JV will be funded primarily through loans from the joint venture partners and loans under the JV’s credit facility agreements with third-party financial institutions. The funds loaned under the credit facility agreements will be used for the development and construction of the facility. We are committed to provide up to £57 million, or $87 million based on the exchange rate as of June 30, 2013, of funding to the JV. Our actual commitment may be more or less depending on the actual cost of the facility. Through June 30, 2013, we had funded approximately £10 million, or $14 million, through loans and less than $1 million through equity contributions. These amounts are included in our Condensed

Consolidated Balance Sheet as long-term “Other assets” and “Investments in unconsolidated entities,” respectively. In addition to the funding commitments described above, the JV has entered into certain foreign currency and interest rate derivatives at the direction of the governmental authority that awarded the project to the JV. The impacts of gains or losses incurred on these derivatives will ultimately be remitted to or recoverable from the governmental authority under the terms of the project, and accordingly, are not reflected in our “Equity in net losses of unconsolidated entities”. We also have guaranteed the performance of certain management services for the project for which our maximum exposure is not material.

In addition, a wholly-owned subsidiary of WM will be responsible for constructing the waste-to-energy facility for the JV under a fixed-price construction contract. Once the facility is constructed, a majority-owned subsidiary of WM will be responsible for operating and maintaining the facility for the JV under a substantially fixed-price operating and maintenance contract. Under the operating and maintenance contract, we have guaranteed our ability to operate this facility at certain performance levels that we believe are achievable. We also will be jointly responsible, along with our Partner, for the performance of sales and marketing services for the JV through a 50%-owned unconsolidated entity. The fixed-price components of the above mentioned contracts were established based on estimates of expected construction, operation and maintenance costs. However, we may not achieve the financial results anticipated and could incur losses if the actual costs differ from the costs established in the contracts. A range of our exposure to potential loss under these contracts cannot presently be estimated.

We determined that we are not the primary beneficiary of the JV as all decision-making responsibility is shared jointly with our Partner. As such, we do not have the power to individually direct the entity’s activities. Accordingly, we account for this investment under the equity method of accounting and do not consolidate this entity.

Investment in Refined Coal Facility — In January 2011, we acquired a noncontrolling interest in a limited liability company, which was established to invest in and manage a refined coal facility. Along with another equity investor, we support the operations of the entity in exchange for a pro-rata share of the tax credits it generates. Our initial consideration for this investment consisted of a cash payment of $48 million. As of June 30, 2013 and December 31, 2012, our investment balance was $25 million and $19 million, respectively, representing our current maximum pre-tax exposure to loss. Under the terms and conditions of the transaction, we do not believe that we have any material exposure to loss. Required capital contributions commenced in the first quarter of 2013 and will continue through the expiration of the tax credits under Section 45 of the Internal Revenue Code, which occurs at the end of 2019. We are only obligated to make future contributions to the extent tax credits are generated. We determined that we are not the primary beneficiary of this entity as we do not have the power to individually direct the entity’s activities. Accordingly, we account for this investment under the equity method of accounting and do not consolidate the entity. Additional information related to this investment is discussed in Note 5.

Investment in Federal Low-Income Housing Tax Credits — In April 2010, we acquired a noncontrolling interest in a limited liability company established to invest in and manage low-income housing properties. We support the operations of the entity in exchange for a pro-rata share of the tax credits it generates. Our target return on the investment is guaranteed and, therefore, we do not believe that we have any material exposure to loss. Our consideration for this investment totaled $221 million, which was comprised of a $215 million note payable and an initial cash payment of $6 million. As of June 30, 2013 and December 31, 2012, our investment balance was $142 million and $153 million, respectively, and our debt balance was $140 million and $152 million, respectively. We determined that we are not the primary beneficiary of this entity as we do not have the power to individually direct the entity’s activities. Accordingly, we account for this investment under the equity method of accounting and do not consolidate the entity. Additional information related to this investment is discussed in Note 5.

Trusts for Final Capping, Closure, Post-Closure or Environmental Remediation Obligations — We have significant financial interests in trust funds that were created to settle certain of our final capping, closure, post-closure or environmental remediation obligations. Generally, we are the sole beneficiary of these restricted balances; however, certain of the funds have been established for the benefit of both the Company and the host community in which we operate. We have determined that these trust funds are variable interest entities; however, we are not the primary beneficiary of these entities because either (i) we do not have the power to direct the significant activities of the trusts or (ii) power over the trusts’ significant activities is shared.

We account for the trusts for which we are the sole beneficiary as long-term “Other assets” in our Condensed Consolidated Balance Sheet. We reflect our interests in the unrealized gains and losses on available-for-sale securities held by these trusts as a component of “Accumulated other comprehensive income.” These trusts had a fair value of $126 million at June 30, 2013 and $125 million at December 31, 2012. Our interests in the trusts that have been established for the benefit of both the Company and the host community in which we operate are accounted for as investments in unconsolidated entities and receivables. These amounts are recorded in “Other receivables,” “Investments in unconsolidated entities” and long-term “Other assets” in our Condensed Consolidated Balance Sheet, as appropriate. Our investments and receivables related to these trusts had an aggregate carrying value of $108 million as of June 30, 2013 and $110 million as of December 31, 2012.

As the party with primary responsibility to fund the related final capping, closure, post-closure or environmental remediation activities, we are exposed to risk of loss as a result of potential changes in the fair value of the assets of the trust. The fair value of trust assets can fluctuate due to (i) changes in the market value of the investments held by the trusts and (ii) credit risk associated with trust receivables. Although we are exposed to changes in the fair value of the trust assets, we currently expect the trust funds to continue to meet the statutory requirements for which they were established.

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5747-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Variable Interest Entity
-URI http://asc.fasb.org/extlink&oid=6528138

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 35
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 2, 14, 15, 16, 23, 24, 25, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Paragraph 24
-Appendix D

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph C4
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
-Paragraph 22B
-Appendix D

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 167
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Interpretation (FIN)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Condensed Consolidating Financial Statements

6 Months Ended

Jun. 30, 2013

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Condensed Consolidating Financial Statements

15. Condensed Consolidating Financial Statements

WM Holdings has fully and unconditionally guaranteed all of WM’s senior indebtedness. WM has fully and unconditionally guaranteed all of WM Holdings’ senior indebtedness. None of WM’s other subsidiaries have guaranteed any of WM’s or WM Holdings’ debt. As a result of these guarantee arrangements, we are required to present the following condensed consolidating financial information (in millions):

CONDENSED CONSOLIDATING BALANCE SHEETS

June 30, 2013

(Unaudited)


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	50	$	—	$	104	$	—		$	154
Other current assets		—		6		2,244		—			2,250

		50		6		2,348		—			2,404
Property and equipment, net		—		—		12,469		—			12,469
Investments in and advances to affiliates		12,786		16,454		3,799		(33,039	)		—
Other assets		42		12		8,085		—			8,139

Total assets	$	12,878	$	16,472	$	26,701	$	(33,039	)	$	23,012


LIABILITIES AND EQUITY
Current liabilities:
Current portion of long-term debt	$	563	$	—	$	213	$	—		$	776
Accounts payable and other current liabilities		126		13		2,107		—			2,246

		689		13		2,320		—			3,022
Long-term debt, less current portion		5,680		449		2,865		—			8,994
Other liabilities		—		—		4,178		—			4,178

Total liabilities		6,369		462		9,363		—			16,194
Equity:
Stockholders’ equity		6,509		16,010		17,029		(33,039	)		6,509
Noncontrolling interests		—		—		309		—			309

		6,509		16,010		17,338		(33,039	)		6,818

Total liabilities and equity	$	12,878	$	16,472	$	26,701	$	(33,039	)	$	23,012

December 31, 2012


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	60	$	—	$	134	$	—		$	194
Other current assets		—		7		2,222		—			2,229

		60		7		2,356		—			2,423
Property and equipment, net		—		—		12,651		—			12,651
Investments in and advances to affiliates		12,686		16,697		3,437		(32,820	)		—
Other assets		45		12		7,966		—			8,023

Total assets	$	12,791	$	16,716	$	26,410	$	(32,820	)	$	23,097


LIABILITIES AND EQUITY
Current liabilities:
Current portion of long-term debt	$	400	$	—	$	343	$	—		$	743
Accounts payable and other current liabilities		77		13		2,203		—			2,293

		477		13		2,546		—			3,036
Long-term debt, less current portion		5,918		449		2,806		—			9,173
Other liabilities		42		—		4,171		—			4,213

Total liabilities		6,437		462		9,523		—			16,422
Equity:
Stockholders’ equity		6,354		16,254		16,566		(32,820	)		6,354
Noncontrolling interests		—		—		321		—			321

		6,354		16,254		16,887		(32,820	)		6,675

Total liabilities and equity	$	12,791	$	16,716	$	26,410	$	(32,820	)	$	23,097

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

Three Months Ended June 30, 2013

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	3,526		$	—		$	3,526
Costs and expenses		—			1			3,015			—			3,016

Income from operations		—			(1	)		511			—			510

Other income (expense):
Interest income (expense)		(91	)		(8	)		(22	)		—			(121	)
Equity in earnings of subsidiaries, net of taxes		299			305			—			(604	)		—
Other, net		—			—			(6	)		—			(6	)

		208			297			(28	)		(604	)		(127	)

Income before income taxes		208			296			483			(604	)		383
Provision for (benefit from) income taxes		(36	)		(3	)		166			—			127

Consolidated net income		244			299			317			(604	)		256
Less: Net income attributable to noncontrolling interests		—			—			12			—			12

Net income attributable to Waste Management, Inc.	$	244		$	299		$	305		$	(604	)	$	244

Three Months Ended June 30, 2012

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	3,459		$	—		$	3,459
Costs and expenses		—			—			2,993			—			2,993

Income from operations		—			—			466			—			466

Other income (expense):
Interest income (expense)		(88	)		(8	)		(24	)		—			(120	)
Equity in earnings of subsidiaries, net of taxes		262			267			—			(529	)		—
Other, net		—			—			(12	)		—			(12	)

		174			259			(36	)		(529	)		(132	)

Income before income taxes		174			259			430			(529	)		334
Provision for (benefit from) income taxes		(34	)		(3	)		152			—			115

Consolidated net income		208			262			278			(529	)		219
Less: Net income attributable to noncontrolling interests		—			—			11			—			11

Net income attributable to Waste Management, Inc.	$	208		$	262		$	267		$	(529	)	$	208

Six Months Ended June 30, 2013

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	6,862		$	—		$	6,862
Costs and expenses		—			1			5,949			—			5,950

Income from operations		—			(1	)		913			—			912

Other income (expense):
Interest income (expense)		(180	)		(16	)		(46	)		—			(242	)
Equity in earnings of subsidiaries, net of taxes		521			532			—			(1,053	)		—
Other, net		—			—			(25	)		—			(25	)

		341			516			(71	)		(1,053	)		(267	)

Income before income taxes		341			515			842			(1,053	)		645
Provision for (benefit from) income taxes		(71	)		(6	)		290			—			213

Consolidated net income		412			521			552			(1,053	)		432
Less: Net income attributable to noncontrolling interests		—			—			20			—			20

Net income attributable to Waste Management, Inc.	$	412		$	521		$	532		$	(1,053	)	$	412

Six Months Ended June 30, 2012

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	6,754		$	—		$	6,754
Costs and expenses		—			—			5,887			—			5,887

Income from operations		—			—			867			—			867

Other income (expense):
Interest income (expense)		(176	)		(16	)		(49	)		—			(241	)
Equity in earnings of subsidiaries, net of taxes		486			496			—			(982	)		—
Other, net		—			—			(20	)		—			(20	)

		310			480			(69	)		(982	)		(261	)

Income before income taxes		310			480			798			(982	)		606
Provision for (benefit from) income taxes		(69	)		(6	)		279			—			204

Consolidated net income		379			486			519			(982	)		402
Less: Net income attributable to noncontrolling interests		—			—			23			—			23

Net income attributable to Waste Management, Inc.	$	379		$	486		$	496		$	(982	)	$	379

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Three Months Ended June 30, 2013
Comprehensive income	$	252	$	299	$	283	$	(604	)	$	230
Less: Comprehensive income attributable to noncontrolling interests		—		—		12		—			12

Comprehensive income attributable to Waste Management, Inc.	$	252	$	299	$	271	$	(604	)	$	218

Three Months Ended June 30, 2012
Comprehensive income	$	190	$	262	$	253	$	(529	)	$	176
Less: Comprehensive income attributable to noncontrolling interests		—		—		11		—			11

Comprehensive income attributable to Waste Management, Inc.	$	190	$	262	$	242	$	(529	)	$	165


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Six Months Ended June 30, 2013
Comprehensive income	$	422	$	521	$	483	$	(1,053	)	$	373
Less: Comprehensive income attributable to noncontrolling interests		—		—		20		—			20

Comprehensive income attributable to Waste Management, Inc.	$	422	$	521	$	463	$	(1,053	)	$	353

Six Months Ended June 30, 2012
Comprehensive income	$	366	$	486	$	523	$	(982	)	$	393
Less: Comprehensive income attributable to noncontrolling interests		—		—		23		—			23

Comprehensive income attributable to Waste Management, Inc.	$	366	$	486	$	500	$	(982	)	$	370

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

Six Months Ended June 30, 2013

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities:
Consolidated net income	$	412		$	521		$	552		$	(1,053	)	$	432
Equity in earnings of subsidiaries, net of taxes		(521	)		(532	)		—			1,053			—
Other adjustments		14			—			676			—			690

Net cash provided by (used in) operating activities		(95	)		(11	)		1,228			—			1,122

Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired		—			—			(210	)		—			(210	)
Capital expenditures		—			—			(501	)		—			(501	)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets		—			—			74			—			74
Net receipts from restricted trust and escrow accounts and other, net		—			—			(56	)		—			(56	)

Net cash provided by (used in) investing activities		—			—			(693	)		—			(693	)

Cash flows from financing activities:
New borrowings		—			—			71			—			71
Debt repayments		(65	)		—			(203	)		—			(268	)
Cash dividends		(341	)		—			—			—			(341	)
Exercise of common stock options		98			—			—			—			98
Distributions paid to noncontrolling interests and other		7			—			(32	)		—			(25	)
(Increase) decrease in intercompany and investments, net		386			11			(397	)		—			—

Net cash provided by (used in) financing activities		85			11			(561	)		—			(465	)

Effect of exchange rate changes on cash and cash equivalents		—			—			(4	)		—			(4	)

Increase (decrease) in cash and cash equivalents		(10	)		—			(30	)		—			(40	)
Cash and cash equivalents at beginning of period		60			—			134			—			194

Cash and cash equivalents at end of period	$	50		$	—		$	104		$	—		$	154

Six Months Ended June 30, 2012

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities:
Consolidated net income	$	379		$	486		$	519		$	(982	)	$	402
Equity in earnings of subsidiaries, net of taxes		(486	)		(496	)		—			982			—
Other adjustments		91			—			651			—			742

Net cash provided by (used in) operating activities		(16	)		(10	)		1,170			—			1,144

Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired		—			—			(154	)		—			(154	)
Capital expenditures		—			—			(730	)		—			(730	)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets		—			—			20			—			20
Net receipts from restricted trust and escrow accounts and other, net		—			—			(39	)		—			(39	)

Net cash provided by (used in) investing activities		—			—			(903	)		—			(903	)

Cash flows from financing activities:
New borrowings		150			—			162			—			312
Debt repayments		(35	)		—			(236	)		—			(271	)
Cash dividends		(329	)		—			—			—			(329	)
Exercise of common stock options		31			—			—			—			31
Distributions paid to noncontrolling interests and other		9			—			(14	)		—			(5	)
(Increase) decrease in intercompany and investments, net		183			10			(193	)		—			—

Net cash provided by (used in) financing activities		9			10			(281	)		—			(262	)

Effect of exchange rate changes on cash and cash equivalents		—			—			—			—			—

Increase (decrease) in cash and cash equivalents		(7	)		—			(14	)		—			(21	)
Cash and cash equivalents at beginning of period		119			—			139			—			258

Cash and cash equivalents at end of period	$	112		$	—		$	125		$	—		$	237

Subsequent Event	6 Months Ended
Subsequent Event	Jun. 30, 2013
Subsequent Events [Abstract]
Subsequent Event	16. Subsequent Event On July 5, 2013, we acquired substantially all of the assets of RCI Environnement Inc., the largest waste management company in Quebec, and certain related entities for a price of C$480 million, or $454 million. Total consideration, inclusive of amounts for estimated working capital, paid at closing was C$509 million, or $481 million, and is subject to certain post-closing adjustments. The acquisition was funded primarily with C$500 million, or $473 million, of cash proceeds from a term loan under our 2012 Canadian credit facility. Under the terms and conditions of our 2012 Canadian credit facility, interest on our term loan advances will be based on a 1.4% spread from the applicable Canadian Dealer Offered Rate (CDOR). Our initial CDOR-based advances, which have terms of one month and three months, have a weighted average effective rate of approximately 2.7%. While our outstanding advances have short-term maturities, they may be renewed under the terms of the facility through its maturity. The maturity date of the Canadian credit facility, including the term loan, is November 7, 2017. Waste Management of Canada Corporation and WM Quebec Inc. are the borrowers under the Canadian credit facility, and WM and WM Holdings are guarantors.

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	The financial statements presented in this report represent the consolidation of Waste Management, Inc., a Delaware corporation; Waste Management’s wholly-owned and majority-owned subsidiaries; and certain variable interest entities for which Waste Management or its subsidiaries are the primary beneficiary as described in Note 14. Waste Management is a holding company and all operations are conducted by its subsidiaries. When the terms “the Company,” “we,” “us” or “our” are used in this document, those terms refer to Waste Management, Inc., its consolidated subsidiaries and consolidated variable interest entities. When we use the term “WM,” we are referring only to Waste Management, Inc., the parent holding company. We are North America’s leading provider of comprehensive waste management environmental services. We partner with our residential, commercial, industrial and municipal customers and the communities we serve to manage and reduce waste at each stage from collection to disposal, while recovering valuable resources and creating clean, renewable energy. Our “Solid Waste” business is operated and managed locally by our subsidiaries that focus on distinct geographic areas and provides collection, transfer, recycling and resource recovery, and disposal services. Through our subsidiaries, we are also a leading developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. Through the third quarter of 2012, the operations of our local subsidiaries were primarily organized under our Eastern, Midwest, Southern, Western and Wheelabrator operating Groups. In July 2012, we announced a reorganization of our operations, designed to streamline management and staff support and reduce our cost structure, while not disrupting our front-line operations. Principal organizational changes included removing the management layer of our four geographic Groups, each of which previously constituted a reportable segment, and consolidating and reducing the number of geographic Areas from 22 to 17. Following our reorganization, our senior management now evaluates, oversees and manages the financial performance of our Solid Waste business subsidiaries through these 17 Areas. Our reportable segments have been realigned to conform with our new organizational structure. Our Wheelabrator business provides waste-to-energy services and manages waste-to-energy facilities and independent power production plants. We also provide additional services that are not managed through our Solid Waste or Wheelabrator businesses, including our strategic accounts program that expanded with the acquisition of Oakleaf Global Holdings on July 28, 2011 (“Oakleaf”), which are presented in this report as “Other.” Additional information related to our segments can be found in Note 8. The Condensed Consolidated Financial Statements as of June 30, 2013 and for the three and six months ended June 30, 2013 and 2012 are unaudited. In the opinion of management, these financial statements include all adjustments, which, unless otherwise disclosed, are of a normal recurring nature, necessary for a fair presentation of the financial position, results of operations, comprehensive income, cash flows, and changes in equity for the periods presented. The results for interim periods are not necessarily indicative of results for the entire year. The financial statements presented herein should be read in connection with the financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2012. In preparing our financial statements, we make numerous estimates and assumptions that affect the accounting for and recognition and disclosure of assets, liabilities, equity, revenues and expenses. We must make these estimates and assumptions because certain information that we use is dependent on future events, cannot be calculated with a high degree of precision from data available or simply cannot be readily calculated. In some cases, these estimates are particularly difficult to determine and we must exercise significant judgment. In preparing our financial statements, the most difficult, subjective and complex estimates and the assumptions that present the greatest amount of uncertainty relate to our accounting for landfills, environmental remediation liabilities, asset impairments, deferred income taxes and reserves associated with our insured and self-insured claims. Actual results could differ materially from the estimates and assumptions that we use in the preparation of our financial statements.
Comprehensive Income	Comprehensive Income — In February 2013, the Financial Accounting Standards Board issued amended authoritative guidance associated with comprehensive income, which requires companies to provide information about the amounts that are reclassified out of accumulated other comprehensive income by component. Additionally, companies are required to present significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. The amendment to authoritative guidance associated with comprehensive income was effective for the Company on January 1, 2013. The adoption of this guidance did not have a material impact on our consolidated financial statements. We have presented the information required by this amendment in Note 12.
Reclassifications	*Reclassifications* Certain reclassifications have been made to our prior period consolidated financial information in order to conform to the current year presentation.

Landfill and Environmental Remediation Liabilities (Tables)

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Liabilities for Landfill and Environmental Remediation Costs

Liabilities for landfill and environmental remediation costs are presented in the table below (in millions):


	June 30, 2013						December 31, 2012
	Landfill		Environmental Remediation		Total		Landfill		Environmental Remediation		Total
Current (in accrued liabilities)	$	103	$	29	$	132	$	104	$	28	$	132
Long-term		1,277		210		1,487		1,234		225		1,459

	$	1,380	$	239	$	1,619	$	1,338	$	253	$	1,591

Changes to Landfill and Environmental Remediation Liabilities

The changes to landfill and environmental remediation liabilities for the year ended December 31, 2012 and the six months ended June 30, 2013 are reflected in the table below (in millions):


	Landfill			Environmental Remediation
December 31, 2011	$	1,292		$	273
Obligations incurred and capitalized		58			—
Obligations settled		(87	)		(30	)
Interest accretion		84			4
Revisions in cost estimates and interest rate assumptions		(8	)		5
Acquisitions, divestitures and other adjustments		(1	)		1

December 31, 2012		1,338			253
Obligations incurred and capitalized		29			—
Obligations settled		(28	)		(10	)
Interest accretion		43			2
Revisions in cost estimates and interest rate assumptions		—			(6	)
Acquisitions, divestitures and other adjustments		(2	)		—

June 30, 2013	$	1,380		$	239

Debt (Tables)

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Components of Debt

The following table summarizes the major components of debt at each balance sheet date (in millions) and provides the maturities and interest rate ranges of each major category as of June 30, 2013:


	June 30, 2013		December 31, 2012
$2.0 billion revolving credit facility, maturing May 2016 (weighted average interest rate of 1.4% at June 30, 2013 and December 31, 2012)	$	335	$	400
Letter of credit facilities, maturing through June 2015		—		—
Canadian credit facility, maturing November 2017 (weighted average effective interest rate of 2.7% at June 30, 2013 and 2.9% at December 31, 2012)		24		75
Senior notes and debentures, maturing through 2039, interest rates ranging from 2.60% to 7.75% (weighted average interest rate of 5.7% at June 30, 2013 and December 31, 2012)		6,296		6,305
Tax-exempt bonds, maturing through 2041, fixed and variable interest rates ranging from 0.1% to 6.0% (weighted average interest rate of 2.5% at June 30, 2013 and 2.8% at December 31, 2012)		2,659		2,727
Capital leases and other, maturing through 2055, interest rates up to 12%		456		409

		9,770		9,916
Current portion of long-term debt		776		743

	$	8,994	$	9,173

Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Fair Values of Derivative Instruments Recorded in Balance Sheet

The following table summarizes the fair values of derivative instruments recorded in our Condensed Consolidated Balance Sheet (in millions):


Derivatives Designated as Hedging Instruments	Balance Sheet Location	June 30, 2013		December 31, 2012
Foreign currency derivatives	Current other assets	$	8	$	—
Electricity commodity derivatives	Current other assets		—		1

Total derivative assets		$	8	$	1

Interest rate derivatives	Current accrued liabilities	$	30	$	—
Electricity commodity derivatives	Current accrued liabilities		4		5
Foreign currency derivatives	Current accrued liabilities		—		11
Interest rate derivatives	Long-term other liabilities		—		42

Total derivative liabilities		$	34	$	58

Impact of Periodic Settlements of Active Swap Agreements and Impact of Terminated Swap Agreements on Results of Operations

The following table summarizes the impact of periodic settlements of active swap agreements and the impact of terminated swap agreements on our results of operations (in millions):



	Three Months Ended June 30,				Six Months Ended June 30,
Decrease to Interest Expense Due to Hedge Accounting for Interest Rate Swaps	2013		2012		2013		2012
Periodic settlements of active swap agreements(a)	$	—	$	2	$	—	$	7
Terminated swap agreements		5		7		10		9

	$	5	$	9	$	10	$	16

(a)

Impact of Pretax Income on Cash Flow Derivatives on Comprehensive Income and Results of Operations

The following table summarizes the pre-tax impacts of our cash flow derivatives on our comprehensive income and results of operations (in millions):


	Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)						Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
	Three Months Ended June 30,					Statement of Operations Classification	Three Months Ended June 30,
Derivatives Designated as Cash Flow Hedges	2013		2012			Statement of Operations Classification	2013			2012
Forward-starting interest rate swaps	$	10	$	(30	)	Interest expense	$	(2	)	$	—
Treasury rate locks		—		—		Interest expense		(1	)		(2	)
Foreign currency derivatives		12		6		Other, net		11			6
Electricity commodity derivatives		4		(2	)	Operating revenues		(1	)		2

	$	26	$	(26	)		$	7		$	6


	Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)							Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
	Six Months Ended June 30,						Statement of Operations Classification	Six Months Ended June 30,
Derivatives Designated as Cash Flow Hedges	2013			2012			Statement of Operations Classification	2013			2012
Forward-starting interest rate swaps	$	12		$	(25	)	Interest expense	$	(4	)	$	—
Treasury rate locks		—			—		Interest expense		(1	)		(4	)
Foreign currency derivatives		19			1		Other, net		19			(3	)
Electricity commodity derivatives		(6	)		4		Operating revenues		(6	)		7

	$	25		$	(20	)		$	8		$	—

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Common Share Data Used for Computing Basic and Diluted Earnings Per Share

Basic and diluted earnings per share were computed using the following common share data (shares in millions):


	Three Months Ended June 30,					Six Months Ended June 30,
	2013			2012		2013			2012
Number of common shares outstanding at end of period		468.1			463.0		468.1			463.0
Effect of using weighted average common shares outstanding		(0.2	)		0.4		(1.3	)		(0.1	)

Weighted average basic common shares outstanding		467.9			463.4		466.8			462.9
Dilutive effect of equity-based compensation awards and other contingently issuable shares		1.5			0.6		1.3			0.8

Weighted average diluted common shares outstanding		469.4			464.0		468.1			463.7

Potentially issuable shares		13.6			17.1		13.6			17.1
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding		1.2			10.3		3.2			10.3

Segment and Related Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Reportable Segments

Summarized financial information concerning our reportable segments for the three and six months ended June 30 is shown in the following table (in millions):


	Gross Operating Revenues		Intercompany Operating Revenues			Net Operating Revenues		Income from Operations
Three Months Ended:
June 30, 2013
Solid Waste:
Tier 1	$	891	$	(144	)	$	747	$	221
Tier 2		1,641		(313	)		1,328		325
Tier 3		871		(139	)		732		131
Wheelabrator		215		(27	)		188		4
Other		554		(23	)		531		(27	)

		4,172		(646	)		3,526		654
Corporate and Other		—		—			—		(144	)

Total	$	4,172	$	(646	)	$	3,526	$	510

June 30, 2012
Solid Waste:
Tier 1	$	851	$	(132	)	$	719	$	219
Tier 2		1,595		(277	)		1,318		318
Tier 3		856		(131	)		725		129
Wheelabrator		206		(32	)		174		17
Other		544		(21	)		523		(64	)

		4,052		(593	)		3,459		619
Corporate and Other		—		—			—		(153	)

Total	$	4,052	$	(593	)	$	3,459	$	466

Six Months Ended:
June 30, 2013
Solid Waste:
Tier 1	$	1,734	$	(277	)	$	1,457	$	428
Tier 2		3,157		(588	)		2,569		623
Tier 3		1,697		(267	)		1,430		240
Wheelabrator		420		(54	)		366		13
Other		1,088		(48	)		1,040		(68	)

		8,096		(1,234	)		6,862		1,236
Corporate and Other		—		—			—		(324	)

Total	$	8,096	$	(1,234	)	$	6,862	$	912

June 30, 2012
Solid Waste:
Tier 1	$	1,677	$	(248	)	$	1,429	$	428
Tier 2		3,102		(515	)		2,587		618
Tier 3		1,661		(244	)		1,417		244
Wheelabrator		413		(62	)		351		22
Other		1,012		(42	)		970		(99	)

		7,865		(1,111	)		6,754		1,213
Corporate and Other		—		—			—		(346	)

Total	$	7,865	$	(1,111	)	$	6,754	$	867

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2013

Equity [Abstract]

Component of Accumulated Other Comprehensive Income


	Six Months Ended June 30, 2013(a)
	Gains and Losses on Derivative Instruments			Unrealized Gains and Losses on Available- for-Sale Securities		Foreign Currency Translation Adjustments			Post- Retirement Benefit Plans			Total
Balance, December 31, 2012	$	(74	)	$	4	$	276		$	(13	)	$	193
Other comprehensive income (loss) before reclassifications		15			—		(69	)		—			(54	)
Amounts reclassified from accumulated other comprehensive income		(5	)		—		—			—			(5	)

Net current period other comprehensive income (loss)		10			—		(69	)		—			(59	)

Balance, June 30, 2013	$	(64	)	$	4	$	207		$	(13	)	$	134

(a)	Amounts in parentheses represent debits to accumulated other comprehensive income.

Reclassification of Component of Accumulated Other Comprehensive Income

The significant amounts reclassified out of each component of accumulated other comprehensive income are as follows (in millions):


	Amount Reclassified from Accumulated Other Comprehensive Income(a)
Details about Accumulated Other Comprehensive Income Components	Three Months Ended June 30, 2013			Six Months Ended June 30, 2013			Statement of Operations Classification
Gains and losses on cash flow hedges:
Forward-starting interest rate swaps	$	(2	)	$	(4	)	Interest expense
Treasury rate locks		(1	)		(1	)	Interest expense
Foreign currency derivatives		11			19		Other, net
Electricity commodity derivatives		(1	)		(6	)	Operating revenues

	$	7		$	8		Total before tax

		(3	)		(3	)	Tax (expense) benefit

Total reclassifications for the period	$	4		$	5		Net of tax

(a)	Amounts in parentheses represent debits to the statement of operations classification.

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities Measured on Recurring Basis

Our assets and liabilities that are measured at fair value on a recurring basis include the following (in millions):


			Fair Value Measurements at June 30, 2013 Using
	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)(a)
Assets:
Money market funds	$	58	$	58	$	—	$	—
Fixed-income securities		37		—		37		—
Redeemable preferred stock		25		—		—		25
Foreign currency derivatives		8		—		8		—

Total assets	$	128	$	58	$	45	$	25

Liabilities:
Interest rate derivatives	$	30	$	—	$	30	$	—
Electricity commodity derivatives		4		—		4		—

Total liabilities	$	34	$	—	$	34	$	—


			Fair Value Measurements at December 31, 2012 Using
	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)(a)
Assets:
Money market funds	$	127	$	127	$	—	$	—
Fixed-income securities		37		—		37		—
Redeemable preferred stock		25		—		—		25
Electricity commodity derivatives		1		—		1		—

Total assets	$	190	$	127	$	38	$	25

Liabilities:
Interest rate derivatives	$	42	$	—	$	42	$	—
Foreign currency derivatives		11		—		11		—
Electricity commodity derivatives		5		—		5		—

Total liabilities	$	58	$	—	$	58	$	—

(a)

Condensed Consolidating Financial Statements (Tables)

6 Months Ended

Jun. 30, 2013

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Condensed Consolidating Balance Sheets

As a result of these guarantee arrangements, we are required to present the following condensed consolidating financial information (in millions):

CONDENSED CONSOLIDATING BALANCE SHEETS

June 30, 2013

(Unaudited)


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	50	$	—	$	104	$	—		$	154
Other current assets		—		6		2,244		—			2,250

		50		6		2,348		—			2,404
Property and equipment, net		—		—		12,469		—			12,469
Investments in and advances to affiliates		12,786		16,454		3,799		(33,039	)		—
Other assets		42		12		8,085		—			8,139

Total assets	$	12,878	$	16,472	$	26,701	$	(33,039	)	$	23,012

LIABILITIES AND EQUITY
Current liabilities:
Current portion of long-term debt	$	563	$	—	$	213	$	—		$	776
Accounts payable and other current liabilities		126		13		2,107		—			2,246

		689		13		2,320		—			3,022
Long-term debt, less current portion		5,680		449		2,865		—			8,994
Other liabilities		—		—		4,178		—			4,178

Total liabilities		6,369		462		9,363		—			16,194
Equity:
Stockholders’ equity		6,509		16,010		17,029		(33,039	)		6,509
Noncontrolling interests		—		—		309		—			309

		6,509		16,010		17,338		(33,039	)		6,818

Total liabilities and equity	$	12,878	$	16,472	$	26,701	$	(33,039	)	$	23,012

December 31, 2012


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
ASSETS
Current assets:
Cash and cash equivalents	$	60	$	—	$	134	$	—		$	194
Other current assets		—		7		2,222		—			2,229

		60		7		2,356		—			2,423
Property and equipment, net		—		—		12,651		—			12,651
Investments in and advances to affiliates		12,686		16,697		3,437		(32,820	)		—
Other assets		45		12		7,966		—			8,023

Total assets	$	12,791	$	16,716	$	26,410	$	(32,820	)	$	23,097

LIABILITIES AND EQUITY
Current liabilities:
Current portion of long-term debt	$	400	$	—	$	343	$	—		$	743
Accounts payable and other current liabilities		77		13		2,203		—			2,293

		477		13		2,546		—			3,036
Long-term debt, less current portion		5,918		449		2,806		—			9,173
Other liabilities		42		—		4,171		—			4,213

Total liabilities		6,437		462		9,523		—			16,422
Equity:
Stockholders’ equity		6,354		16,254		16,566		(32,820	)		6,354
Noncontrolling interests		—		—		321		—			321

		6,354		16,254		16,887		(32,820	)		6,675

Total liabilities and equity	$	12,791	$	16,716	$	26,410	$	(32,820	)	$	23,097

Condensed Consolidating Statements of Operations

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

Three Months Ended June 30, 2013

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	3,526		$	—		$	3,526
Costs and expenses		—			1			3,015			—			3,016

Income from operations		—			(1	)		511			—			510

Other income (expense):
Interest income (expense)		(91	)		(8	)		(22	)		—			(121	)
Equity in earnings of subsidiaries, net of taxes		299			305			—			(604	)		—
Other, net		—			—			(6	)		—			(6	)

		208			297			(28	)		(604	)		(127	)

Income before income taxes		208			296			483			(604	)		383
Provision for (benefit from) income taxes		(36	)		(3	)		166			—			127

Consolidated net income		244			299			317			(604	)		256
Less: Net income attributable to noncontrolling interests		—			—			12			—			12

Net income attributable to Waste Management, Inc.	$	244		$	299		$	305		$	(604	)	$	244

Three Months Ended June 30, 2012

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	3,459		$	—		$	3,459
Costs and expenses		—			—			2,993			—			2,993

Income from operations		—			—			466			—			466

Other income (expense):
Interest income (expense)		(88	)		(8	)		(24	)		—			(120	)
Equity in earnings of subsidiaries, net of taxes		262			267			—			(529	)		—
Other, net		—			—			(12	)		—			(12	)

		174			259			(36	)		(529	)		(132	)

Income before income taxes		174			259			430			(529	)		334
Provision for (benefit from) income taxes		(34	)		(3	)		152			—			115

Consolidated net income		208			262			278			(529	)		219
Less: Net income attributable to noncontrolling interests		—			—			11			—			11

Net income attributable to Waste Management, Inc.	$	208		$	262		$	267		$	(529	)	$	208

Six Months Ended June 30, 2013

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	6,862		$	—		$	6,862
Costs and expenses		—			1			5,949			—			5,950

Income from operations		—			(1	)		913			—			912

Other income (expense):
Interest income (expense)		(180	)		(16	)		(46	)		—			(242	)
Equity in earnings of subsidiaries, net of taxes		521			532			—			(1,053	)		—
Other, net		—			—			(25	)		—			(25	)

		341			516			(71	)		(1,053	)		(267	)

Income before income taxes		341			515			842			(1,053	)		645
Provision for (benefit from) income taxes		(71	)		(6	)		290			—			213

Consolidated net income		412			521			552			(1,053	)		432
Less: Net income attributable to noncontrolling interests		—			—			20			—			20

Net income attributable to Waste Management, Inc.	$	412		$	521		$	532		$	(1,053	)	$	412

Six Months Ended June 30, 2012

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Operating revenues	$	—		$	—		$	6,754		$	—		$	6,754
Costs and expenses		—			—			5,887			—			5,887

Income from operations		—			—			867			—			867

Other income (expense):
Interest income (expense)		(176	)		(16	)		(49	)		—			(241	)
Equity in earnings of subsidiaries, net of taxes		486			496			—			(982	)		—
Other, net		—			—			(20	)		—			(20	)

		310			480			(69	)		(982	)		(261	)

Income before income taxes		310			480			798			(982	)		606
Provision for (benefit from) income taxes		(69	)		(6	)		279			—			204

Consolidated net income		379			486			519			(982	)		402
Less: Net income attributable to noncontrolling interests		—			—			23			—			23

Net income attributable to Waste Management, Inc.	$	379		$	486		$	496		$	(982	)	$	379

Condensed Consolidating Statements of Comprehensive Income

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Three Months Ended June 30, 2013
Comprehensive income	$	252	$	299	$	283	$	(604	)	$	230
Less: Comprehensive income attributable to noncontrolling interests		—		—		12		—			12

Comprehensive income attributable to Waste Management, Inc.	$	252	$	299	$	271	$	(604	)	$	218

Three Months Ended June 30, 2012
Comprehensive income	$	190	$	262	$	253	$	(529	)	$	176
Less: Comprehensive income attributable to noncontrolling interests		—		—		11		—			11

Comprehensive income attributable to Waste Management, Inc.	$	190	$	262	$	242	$	(529	)	$	165


	WM		WM Holdings		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Six Months Ended June 30, 2013
Comprehensive income	$	422	$	521	$	483	$	(1,053	)	$	373
Less: Comprehensive income attributable to noncontrolling interests		—		—		20		—			20

Comprehensive income attributable to Waste Management, Inc.	$	422	$	521	$	463	$	(1,053	)	$	353

Six Months Ended June 30, 2012
Comprehensive income	$	366	$	486	$	523	$	(982	)	$	393
Less: Comprehensive income attributable to noncontrolling interests		—		—		23		—			23

Comprehensive income attributable to Waste Management, Inc.	$	366	$	486	$	500	$	(982	)	$	370

Condensed Consolidating Statements of Cash Flows

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS

Six Months Ended June 30, 2013

(Unaudited)


				WM			Non-Guarantor
	WM			Holdings			Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities:
Consolidated net income	$	412		$	521		$	552		$	(1,053	)	$	432
Equity in earnings of subsidiaries, net of taxes		(521	)		(532	)		—			1,053			—
Other adjustments		14			—			676			—			690

Net cash provided by (used in) operating activities		(95	)		(11	)		1,228			—			1,122

Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired		—			—			(210	)		—			(210	)
Capital expenditures		—			—			(501	)		—			(501	)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets		—			—			74			—			74
Net receipts from restricted trust and escrow accounts and other, net		—			—			(56	)		—			(56	)

Net cash provided by (used in) investing activities		—			—			(693	)		—			(693	)

Cash flows from financing activities:
New borrowings		—			—			71			—			71
Debt repayments		(65	)		—			(203	)		—			(268	)
Cash dividends		(341	)		—			—			—			(341	)
Exercise of common stock options		98			—			—			—			98
Distributions paid to noncontrolling interests and other		7			—			(32	)		—			(25	)
(Increase) decrease in intercompany and investments, net		386			11			(397	)		—			—

Net cash provided by (used in) financing activities		85			11			(561	)		—			(465	)

Effect of exchange rate changes on cash and cash equivalents		—			—			(4	)		—			(4	)

Increase (decrease) in cash and cash equivalents		(10	)		—			(30	)		—			(40	)
Cash and cash equivalents at beginning of period		60			—			134			—			194

Cash and cash equivalents at end of period	$	50		$	—		$	104		$	—		$	154

Six Months Ended June 30, 2012

(Unaudited)


	WM			WM Holdings			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities:
Consolidated net income	$	379		$	486		$	519		$	(982	)	$	402
Equity in earnings of subsidiaries, net of taxes		(486	)		(496	)		—			982			—
Other adjustments		91			—			651			—			742

Net cash provided by (used in) operating activities		(16	)		(10	)		1,170			—			1,144

Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired		—			—			(154	)		—			(154	)
Capital expenditures		—			—			(730	)		—			(730	)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets		—			—			20			—			20
Net receipts from restricted trust and escrow accounts and other, net		—			—			(39	)		—			(39	)

Net cash provided by (used in) investing activities		—			—			(903	)		—			(903	)

Cash flows from financing activities:
New borrowings		150			—			162			—			312
Debt repayments		(35	)		—			(236	)		—			(271	)
Cash dividends		(329	)		—			—			—			(329	)
Exercise of common stock options		31			—			—			—			31
Distributions paid to noncontrolling interests and other		9			—			(14	)		—			(5	)
(Increase) decrease in intercompany and investments, net		183			10			(193	)		—			—

Net cash provided by (used in) financing activities		9			10			(281	)		—			(262	)

Effect of exchange rate changes on cash and cash equivalents		—			—			—			—			—

Increase (decrease) in cash and cash equivalents		(7	)		—			(14	)		—			(21	)
Cash and cash equivalents at beginning of period		119			—			139			—			258

Cash and cash equivalents at end of period	$	112		$	—		$	125		$	—		$	237

Basis of Presentation - Additional Information (Detail) - 2012 Restructuring [Member]	1 Months Ended
	Jul. 31, 2012 Areas
Description Of Business [Line Items]
Number of areas pre restructuring	22
Number of areas post restructuring	17

Landfill and Environmental Remediation Liabilities - Liabilities for Landfill and Environmental Remediation Costs (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Site Contingency [Line Items]
Total, Environmental Remediation	$ 239
Current (in accrued liabilities)	132	$ 132
Long-term	1,487	1,459
Total	1,619	1,591
Landfill Liabilities [Member]
Site Contingency [Line Items]
Current (in accrued liabilities), Landfill	103	104
Long-term, Landfill	1,277	1,234
Total, Landfill Liabilities	1,380	1,338	$ 1,292
Environmental Remediation Liabilities [Member]
Site Contingency [Line Items]
Current (in accrued liabilities), Environmental Remediation	29	28
Long-term, Environmental Remediation	210	225
Total, Environmental Remediation	$ 239	$ 253	$ 273

Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Detail) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Environmental Exit Cost [Line Items]
Interest accretion	$ 43	$ 41
Ending balance, environmental remediation	239
Environmental Remediation Liabilities [Member]
Environmental Exit Cost [Line Items]
Beginning balance, environmental remediation	253	273	$ 273
Obligations incurred and capitalized
Obligations settled	(10)		(30)
Interest accretion	2		4
Revisions in cost estimates and interest rate assumptions	(6)		5
Acquisitions, divestitures and other adjustments			1
Ending balance, environmental remediation	239		253
Landfill Liabilities [Member]
Environmental Exit Cost [Line Items]
Beginning balance, landfill	1,338	$ 1,292	1,292
Obligations incurred and capitalized	29		58
Obligations settled	(28)		(87)
Interest accretion	43		84
Revisions in cost estimates and interest rate assumptions			(8)
Acquisitions, divestitures and other adjustments	(2)		(1)
Ending balance, landfill	$ 1,380		$ 1,338

Debt - Components of Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Revolving Credit Facility	$ 335	$ 400
Letter of credit facilities
Canadian credit facility	24	75
Senior notes and debentures, maturing through 2039, interest rates ranging from 2.60% to 7.75% (weighted average interest rate of 5.7% at June 30, 2013 and December 31, 2012)	6,296	6,305
Tax-exempt bonds	2,659	2,727
Capital leases and other	456	409
Total long-term debt	9,770	9,916
Current portion of long-term debt	776	743
Long-term debt, less current portion	$ 8,994	$ 9,173

Debt - Components of Debt (Parenthetical) (Detail) - USD ($) $ in Billions	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Capital leases and other [Member]
Debt Instrument [Line Items]
Interest rate upper range	12.00%
End period of maturity for debt instrument	Dec. 31, 2055
Revolving credit facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, aggregate capacity	$ 2.0	$ 2.0
Weighted average interest rate	1.40%	1.40%
End period of maturity for debt instrument	May 09, 2016
Letter of credit facilities [Member]
Debt Instrument [Line Items]
End period of maturity for debt instrument	Jun. 30, 2015
Canadian credit facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate	2.70%	2.90%
End period of maturity for debt instrument	Nov. 07, 2017
Senior notes and debentures [Member]
Debt Instrument [Line Items]
Weighted average interest rate	5.70%	5.70%
Interest rate lower range	2.60%
Interest rate upper range	7.75%
End period of maturity for debt instrument	Nov. 30, 2039
Tax-exempt bonds [Member]
Debt Instrument [Line Items]
Weighted average interest rate	2.50%	2.80%
Interest rate lower range	0.10%
Interest rate upper range	6.00%
End period of maturity for debt instrument	Nov. 01, 2041

Debt - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Debt maturing within twelve months		$ 902
Outstanding borrowing under revolving credit facility		335	$ 400
Canadian credit facility		24	75
Senior notes and debentures		6,296	6,305
Tax-exempt bonds, current		110
Tax-exempt bonds subject to re-pricing within next 12 months		577
Debt maturing within twelve months classified as long-term		703
Short Term Borrowings		776	743
Letter of credit outstanding, revolving credit and letter of credit facilities		1,400
Letter of credit outstanding, revolving credit facility		961
Unused and available credit capacity, revolving credit facility		704
Net debt repayments		197
Repayment of tax exemption bonds		67
Letter of Credit Facilities [Member]
Debt Instrument [Line Items]
Letters of credit, aggregate capacity		2,400
Subsequent event [Member]
Debt Instrument [Line Items]
Revolving credit facility, extending term end date.	Jul. 26, 2018
5.0% Senior Notes Due March 2014 [Member]
Debt Instrument [Line Items]
Senior notes and debentures		$ 350
Interest rate of senior notes		5.00%
Revolving credit facility [Member]
Debt Instrument [Line Items]
Outstanding borrowing under revolving credit facility		$ 335
Letters of credit, aggregate capacity		$ 2,000	$ 2,000
Revolving credit facility, extending term end date.		May 09, 2016
Repayment of net of borrowings under revolving credit facility		$ 65
Revised revolving credit facility [Member] \| Subsequent event [Member]
Debt Instrument [Line Items]
Letters of credit, aggregate capacity	$ 2,250
Canadian credit facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, extending term end date.		Nov. 07, 2017
Net Repayment of Canadian credit facility debt		$ 50

Derivative Instruments and Hedging Activities - Fair Values of Derivative Instruments Recorded in Balance Sheet (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Derivative assets designated as hedging instruments	$ 8	$ 1
Derivative liabilities designated as hedging instruments	34	58
Current other assets [Member] \| Foreign currency derivatives [Member] \| Cash flow hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative assets designated as hedging instruments	8
Current other assets [Member] \| Electricity commodity derivatives [Member] \| Cash flow hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative assets designated as hedging instruments		1
Current accrued liabilities [Member] \| Foreign currency derivatives [Member] \| Cash flow hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as hedging instruments		11
Current accrued liabilities [Member] \| Electricity commodity derivatives [Member] \| Cash flow hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as hedging instruments	4	5
Current accrued liabilities [Member] \| Interest rate swaps [Member] \| Cash flow hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as hedging instruments	30
Long-term other liabilities [Member] \| Interest rate swaps [Member] \| Cash flow hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities designated as hedging instruments		$ 42

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Millions, $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Apr. 30, 2012 USD ($)	Jun. 30, 2013 USD ($) Derivative	Sep. 30, 2012 USD ($)	Jun. 30, 2012	Jun. 30, 2013 USD ($) Derivative	Jun. 30, 2012	Dec. 31, 2013 MW	Dec. 31, 2012 USD ($) Derivative MW	Jun. 30, 2013 CAD ($) Derivative
Derivative Instruments, Gain (Loss) [Line Items]
Termination of interest rate swaps	$ 1,000
Proceeds from termination of interest rate swaps	$ 76
Increase in carrying value of debt instruments from fair value hedge accounting for interest rate swaps					$ 69			$ 79
Deferred losses, net of taxes, related to cash flow hedges included in accumulated other comprehensive income		$ (64)			(64)			(74)
Senior notes and debentures		6,296			6,296			6,305
5.0% Senior Notes Due March 2014 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Senior notes and debentures		$ 350			$ 350
Interest rate of senior notes		5.00%			5.00%				5.00%
Historical Net Forward Starting Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregation of all forward starting swaps		$ 525			$ 525
Forward Starting Interest Rate Swap [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maximum term of cash flow hedges					10 years
Deferred losses, net of taxes, related to cash flow hedges included in accumulated other comprehensive income		(36)			$ (36)			(39)
Deferred losses scheduled to be reclassified out of accumulated other comprehensive into interest expense over next 12 months, pre-tax		7			7
Fair value of forward-starting swaps (interest rate derivatives) included in current liabilities		30			$ 30
Fair value of forward-starting swaps (interest rate derivatives) included in long-term liabilities								42
Terminated Forward Starting Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregation of all forward starting swaps			$ 200
Cash paid to settle cash flow hedge instruments			$ 59
Terminated Forward Starting Swap [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness recognized upon termination of forward starting swaps			The ineffectiveness recognized upon termination of these hedges was immaterial.
Treasury rate locks [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Maximum term of cash flow hedges					19 years
Deferred losses, net of taxes, related to cash flow hedges included in accumulated other comprehensive income		(7)			$ (7)			$ (7)
Deferred losses scheduled to be reclassified out of accumulated other comprehensive into interest expense over next 12 months, pre-tax		$ 2			$ 2
Principal [Member] \| October 31, 2013 [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency cash flow hedges									$ 370
Interest [Member] \| October 31, 2013 [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency cash flow hedges									$ 10
Electricity commodity derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Merchant electricity sales hedged or expected to be hedged \| MW								628,800
Percentage of merchant electricity sales hedged		56.00%		16.00%	54.00%	24.00%		20.00%
Electricity commodity derivatives [Member] \| Subsequent event [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Merchant electricity sales hedged or expected to be hedged \| MW							1,750,000
Expected percentage of merchant electricity sales hedged							55.00%
Interest rate swaps [Member] \| Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Number of hedges outstanding \| Derivative		0			0			0	0

Derivative Instruments and Hedging Activities - Impact of Periodic Settlements of Active Swap Agreements and Impact of Terminated Swap Agreements on Results of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Periodic settlements of active swap agreements		$ 2		$ 7
Terminated swap agreements	5	7	10	9
Total	$ 5	$ 9	$ 10	$ 16

Derivative Instruments and Hedging Activities - Impact of Periodic Settlements of Active Swap Agreements and Impact of Terminated Swap Agreements on Results of Operations (Parenthetical) (Detail) $ in Billions	Apr. 30, 2012 USD ($)
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional amount of interest rate swaps	$ 1

Derivative Instruments and Hedging Activities - Impact of Pretax Income on Cash Flow Derivatives on Comprehensive Income and Results of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)	$ 26	$ (26)	$ 25	$ (20)
Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	7	6	8
Interest rate swaps [Member] \| Interest Expense [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)	10	(30)	12	(25)
Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(2)		(4)
Treasury rate locks [Member] \| Interest Expense [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)
Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(1)	(2)	(1)	(4)
Foreign currency derivatives [Member] \| Other, net [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)	12	6	19	1
Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	11	6	19	(3)
Electricity commodity derivatives [Member] \| Operating Revenues [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Derivative Gain (Loss) Recognized in OCI (Effective Portion)	4	(2)	(6)	4
Derivative Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ (1)	$ 2	$ (6)	$ 7

Income Taxes - Additional information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2013
Income Taxes [Line Items]
Effective tax rate	33.20%	34.30%	33.00%	33.60%
Equity in net losses of unconsolidated entities	$ (8)	$ (11)	$ (16)	$ (18)
Provision for income taxes	127	115	213	204
Interest expense	122	121	244	243
Investment in Refined Coal Facility [Member]
Income Taxes [Line Items]
Equity in net losses of unconsolidated entities	(2)	(1)	(3)	(2)
Provision for income taxes	(6)	(5)	(9)	(8)
Low-Income Housing Properties [Member]
Income Taxes [Line Items]
Equity in net losses of unconsolidated entities	(6)	(6)	(12)	(12)
Provision for income taxes	(10)	(9)	(17)	(16)
Interest expense	2	2	3	3
Tax credits from equity method investment	$ 7	$ 6	$ 11	$ 10
Subsequent event [Member]
Income Taxes [Line Items]
Percentage of qualifying capital expenditures on property depreciated immediately					50.00%

Earnings Per Share - Common Share Data Used for Computing Basic and Diluted Earnings Per Share (Detail) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Number of common shares outstanding at end of period	468.1	463.0	468.1	463.0
Effect of using weighted average common shares outstanding	(0.2)	0.4	(1.3)	(0.1)
Weighted average basic common shares outstanding	467.9	463.4	466.8	462.9
Dilutive effect of equity-based compensation awards and other contingently issuable shares	1.5	0.6	1.3	0.8
Weighted average diluted common shares outstanding	469.4	464.0	468.1	463.7
Potentially issuable shares	13.6	17.1	13.6	17.1
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding	1.2	10.3	3.2	10.3

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2646-109256

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Commitments and Contingencies - Additional information (Detail)	6 Months Ended
	Jun. 30, 2013 USD ($) Homeowners Landfill site
Contingencies And Commitments [Line Items]
Term of Guarantees of financial obligations	Guarantees of unconsolidated entities' financial obligations maturing through 2020
Maximum potential future payments regarding guarantees of unconsolidated entities financial obligations	$ 10,000,000
Approximate number of homeowners' properties adjacent to or near certain of our landfills with agreements guaranteeing market value \| Homeowners	850
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value \| Landfill	20
High end estimate of reasonably possible additional losses associated with environmental remediation liabilities	$ 145,000,000
Environmental remediation liability	$ 239,000,000
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP \| site	80
Number of owned sites listed on the EPA's NPL for which we have been notified we are a PRP \| site	15
Number of non-owned sites listed on the EPA's NPL for which we have been notified we are a PRP \| site	65
Dollar threshold for environmental matters requiring disclosure under item 103 of the SEC's Regulation S-K	$ 100,000
Approximate percentage of workforce covered by collective bargaining agreements	20.00%
Estimate of possible loss	$ 40,000,000
2012 Audit [Member]
Contingencies And Commitments [Line Items]
Number of months expected for IRS audit(s) to be completed	9 months
2013 Audit [Member]
Contingencies And Commitments [Line Items]
Number of months expected for IRS audit(s) to be completed	21 months

Segment and Related Information - Additional Information (Detail)	1 Months Ended	6 Months Ended
	Jul. 31, 2012 Areas	Jun. 30, 2013 Segment
Segment Reporting Information [Line Items]
Number of geographic segments prior to organization changes \| Segment		4
2012 Restructuring [Member]
Segment Reporting Information [Line Items]
Number of areas pre restructuring	22
Number of areas post restructuring	17

Segment and Related Information - Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Gross Operating Revenues	$ 4,172	$ 4,052	$ 8,096	$ 7,865
Intercompany Operating Revenues	(646)	(593)	(1,234)	(1,111)
Net Operating Revenues	3,526	3,459	6,862	6,754
Income from operations	510	466	912	867
Solid Waste: Tier 1 [Member]
Segment Reporting Information [Line Items]
Gross Operating Revenues	891	851	1,734	1,677
Intercompany Operating Revenues	(144)	(132)	(277)	(248)
Net Operating Revenues	747	719	1,457	1,429
Income from operations	221	219	428	428
Solid Waste: Tier 2 [Member]
Segment Reporting Information [Line Items]
Gross Operating Revenues	1,641	1,595	3,157	3,102
Intercompany Operating Revenues	(313)	(277)	(588)	(515)
Net Operating Revenues	1,328	1,318	2,569	2,587
Income from operations	325	318	623	618
Solid Waste: Tier 3 [Member]
Segment Reporting Information [Line Items]
Gross Operating Revenues	871	856	1,697	1,661
Intercompany Operating Revenues	(139)	(131)	(267)	(244)
Net Operating Revenues	732	725	1,430	1,417
Income from operations	131	129	240	244
Wheelabrator business [Member]
Segment Reporting Information [Line Items]
Gross Operating Revenues	215	206	420	413
Intercompany Operating Revenues	(27)	(32)	(54)	(62)
Net Operating Revenues	188	174	366	351
Income from operations	4	17	13	22
Other [Member]
Segment Reporting Information [Line Items]
Gross Operating Revenues	554	544	1,088	1,012
Intercompany Operating Revenues	(23)	(21)	(48)	(42)
Net Operating Revenues	531	523	1,040	970
Income from operations	(27)	(64)	(68)	(99)
Operating Group Total [Member]
Segment Reporting Information [Line Items]
Gross Operating Revenues	4,172	4,052	8,096	7,865
Intercompany Operating Revenues	(646)	(593)	(1,234)	(1,111)
Net Operating Revenues	3,526	3,459	6,862	6,754
Income from operations	654	619	1,236	1,213
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	$ (144)	$ (153)	$ (324)	$ (346)

Acquisitions - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($) Operations	Jun. 30, 2012 USD ($) Operations	Jan. 31, 2013 USD ($)
Business Acquisition [Line Items]
Revenues recognized by acquiree	$ 3,526	$ 3,459	$ 6,862	$ 6,754
Net loss recognized by acquiree	244	$ 208	$ 412	$ 379
Number of collection operations acquired \| Operations			7
Number of collection and recycling operations acquired \| Operations				8
Payments to acquire collection and energy services operations			$ 40
Oil and Gas [Member]
Business Acquisition [Line Items]
Acquisitions of businesses, net of cash acquired				$ 94
Greenstar LLC [Member]
Business Acquisition [Line Items]
Acquisition cost of acquired entity					$ 170
Additional consideration payable					40
Estimated fair value of liability for additional cash payments related to acquisitions					36
Revenues recognized by acquiree	40		65
Net loss recognized by acquiree	$ 4		$ 7
Allocation of purchase price to Other intangible assets					32
Allocation of purchase price to Property and equipment					57
Allocation of purchase price to Goodwill					$ 122

Restructuring - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		24 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges	$ 2	$ 3	$ 10	$ 7
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges associated with this reorganization related to employee severance and benefit costs			$ 3	7
Employee severance and benefit costs from restructurings beginning in 2011					$ 77
Employee severance and benefit cost payments through the balance sheet date					65
Remaining employee severance payable through our restructuring efforts					$ 9
Completion date of restructuring activities					Dec. 31, 2014
Employee Severance [Member] \| Oakleaf [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges associated with this reorganization related to employee severance and benefit costs				$ 3

- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(10)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.P.3)
-URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140864-122747

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5-8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 146
-Paragraph 8-13, 20
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS146-1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 112
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Asset Impairments and Unusual Items - Additional Information (Detail) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($) Investment	Jun. 30, 2012 USD ($) Investment	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($) Investment
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Gains on divestures				$ 9
Loss on divestiture related to oil and gas producing properties				6
(Income) expense from divestitures, asset impairments and unusual items	$ 11		$ 33	15	$ 33
Cost-method Investments [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Impairment charge relating to decline in value of investment accounted under cost method		$ 11
Number of investments impaired that are accounted for under the cost method \| Investment		2
Other [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Impairment charge related to goodwill				4
Impairment charges					$ 34
Number of medical waste services facilities impaired \| Investment			2		2
Cost-method Investments, Realized Gain (Loss)	$ 4
Wheelabrator business [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Impairment charges				$ 14

Accumulated Other Comprehensive Income - Component of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning Balance, Gains and Losses on Derivative Instruments			$ (74)
Other comprehensive income (loss) before reclassifications, Gains and Losses on Derivative Instruments	$ 16	$ (16)	15	$ (12)
Amounts reclassified from accumulated other comprehensive income, Gains and Losses on Derivative Instruments	(4)	(4)	(5)
Net current period other comprehensive income (loss), Gains and Losses on Derivative Instruments	12	(20)	10	(12)
Ending Balance, Gains and Losses on Derivative Instruments	(64)		(64)
Beginning Balance, Unrealized Gains and Losses on Available-for-Sale Securities			4
Other comprehensive income (loss) before reclassifications, Unrealized Gains and Losses on Available-for-Sale Securities
Amounts reclassified from accumulated other comprehensive income, Unrealized Gains and Losses on Available-for-Sale Securities
Net current period other comprehensive income (loss), Unrealized Gains and Losses on Available-for-Sale Securities	(1)	(1)		1
Ending Balance, Unrealized Gains and Losses on Available-for-Sale Securities	4		4
Beginning Balance, Foreign Currency Translation Adjustments			276
Other comprehensive income (loss) before reclassifications, Foreign Currency Translation Adjustments			(69)
Amounts reclassified from accumulated other comprehensive income, Foreign Currency Translation Adjustments
Net current period other comprehensive income (loss), Foreign Currency Translation Adjustments	(37)	(22)	(69)	2
Ending Balance, Foreign Currency Translation Adjustments	207		207
Beginning Balance, Post-Retirement Benefit Plans			(13)
Other comprehensive income (loss) before reclassifications, Post-Retirement Benefit Plans
Amounts reclassified from accumulated other comprehensive income, Post-Retirement Benefit Plans
Net current period other comprehensive income (loss), Post-Retirement Benefit Plans
Ending Balance, Post-Retirement Benefit Plans	(13)		(13)
Beginning Balance, Total			193
Other comprehensive income (loss) before reclassifications, Total			(54)
Amounts reclassified from accumulated other comprehensive income, Total			(5)
Other comprehensive income (loss), net of taxes	(26)	$ (43)	(59)	$ (9)
Ending Balance, Total	$ 134		$ 134

Accumulated Other Comprehensive Income - Reclassification of Component of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ (122)	$ (121)	$ (244)	$ (243)
Other, net	(2)	1	9	2
Operating revenues	3,526	3,459	6,862	6,754
Gains and losses on cash flow hedges, Total before tax	(383)	(334)	(645)	(606)
Gains and losses on cash flow hedges, Tax (expense) benefit	127	$ 115	213	$ 204
Total reclassifications for the period, Net of tax			5
Amount Reclassified from Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses on cash flow hedges, Total before tax	7		8
Gains and losses on cash flow hedges, Tax (expense) benefit	(3)		(3)
Total reclassifications for the period, Net of tax	4		5
Interest rate swaps [Member] \| Amount Reclassified from Accumulated Other Comprehensive Income [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	(2)		(4)
Treasury rate locks [Member] \| Amount Reclassified from Accumulated Other Comprehensive Income [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	(1)		(1)
Foreign currency derivatives [Member] \| Amount Reclassified from Accumulated Other Comprehensive Income [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other, net	11		19
Electricity commodity derivatives [Member] \| Amount Reclassified from Accumulated Other Comprehensive Income [Member] \| Cash flow hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Operating revenues	$ (1)		$ (6)

Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Assets:
Money market funds	$ 58	$ 127
Fixed-income securities	37	37
Redeemable preferred stock	25	25
Electricity commodity derivatives		1
Foreign currency derivatives	8
Total assets	128	190
Liabilities:
Interest rate derivatives	30	42
Foreign currency derivatives		11
Electricity commodity derivatives	4	5
Total liabilities	34	58
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Money market funds	58	127
Fixed-income securities
Redeemable preferred stock
Electricity commodity derivatives
Foreign currency derivatives
Total assets	58	127
Liabilities:
Interest rate derivatives
Foreign currency derivatives
Electricity commodity derivatives
Total liabilities
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Money market funds
Fixed-income securities	37	37
Redeemable preferred stock
Electricity commodity derivatives		1
Foreign currency derivatives	8
Total assets	45	38
Liabilities:
Interest rate derivatives	30	42
Foreign currency derivatives		11
Electricity commodity derivatives	4	5
Total liabilities	34	58
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Money market funds
Fixed-income securities
Redeemable preferred stock	25	25
Electricity commodity derivatives
Foreign currency derivatives
Total assets	25	25
Liabilities:
Interest rate derivatives
Foreign currency derivatives
Electricity commodity derivatives
Total liabilities

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Carrying value of debt	$ 9,770	$ 9,916
Estimated fair value of debt	$ 10,500	$ 11,300

Variable Interest Entities - Additional Information (Detail) £ in Millions, $ in Millions	1 Months Ended			3 Months Ended			6 Months Ended
	Jan. 31, 2011 USD ($)	Apr. 30, 2010 USD ($)	Jun. 30, 2000 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2012	Jun. 30, 2013 USD ($)	Jun. 30, 2013 GBP (£)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 GBP (£)	Dec. 31, 2012 USD ($)
Business Acquisition [Line Items]
Under the LLC agreements, the LLC shall be dissolved upon the occurrence of any of the following events			(i) a written decision of all members of the LLCs; (ii) December 31, 2063; (iii) a court's dissolution of the LLCs; or (iv) the LLCs ceasing to own any interest in the waste-to-energy facilities.
Noncontrolling Interest				$ 309			$ 309				$ 321
Expense recognized for other companies' noncontrolling interests in LLCs earnings				11	$ 12		22		$ 25
Variable interest entities primary beneficiary trust fair value assets				126			126				125
Carrying value of restricted trust funds and escrow accounts for which company is not the sole beneficiary specifically for future settlement of landfill and environmental remediation liabilities				108			108				110
Limited Liability Company II [Member]
Business Acquisition [Line Items]
Percentage of ownership in LLC's			0.25%
Percentage of variable interest entities owned by other companies			99.75%
Limited Liability Company [Member]
Business Acquisition [Line Items]
Percentage of ownership in LLC's			0.50%
Percentage of variable interest entities owned by other companies			99.50%
Limited Liability Company [Member] \| Limited Liability Company II [Member]
Business Acquisition [Line Items]
Total initial investment by other companies			$ 167
Reporting entity percentage of interest in earnings of variable interest entity after achieving targeted returns			80.00%
Other companies percentage of interest in earnings of variable interest entity after achieving targeted returns			20.00%
Net property and equipment				290			290				296
Noncontrolling Interest				244			244				245
Investment in Recycling and Waste-to-Energy [Member]
Business Acquisition [Line Items]
Percentage of ownership in LLC's						50.00%
Expected cost to construct Waste-to-Energy LLC facility				304			304			£ 200
Total commitment							87	£ 57
Note receivables balance from the LLC							14	£ 10
Investment balance				1			1
Investment in Refined Coal Facility [Member]
Business Acquisition [Line Items]
Investment balance				25			25				19
Cash payments to acquire equity method investment	$ 48
Low-Income Housing Properties [Member]
Business Acquisition [Line Items]
Investment balance				142			142				153
Cash payments to acquire equity method investment		$ 6
Consideration for investment		221
Value of notes payable included in consideration for investment		$ 215
Equity method investments debt balance				$ 140			$ 140				$ 152

Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 154	$ 194	$ 237	$ 258
Other current assets	2,250	2,229
Total current assets	2,404	2,423
Property and equipment, net	12,469	12,651
Investments in and advances to affiliates
Other assets	8,139	8,023
Total assets	23,012	23,097
Current liabilities:
Current portion of long-term debt	776	743
Accounts payable and other current liabilities	2,246	2,293
Total current liabilities	3,022	3,036
Long-term debt, less current portion	8,994	9,173
Other liabilities	4,178	4,213
Total liabilities	16,194	16,422
Equity:
Stockholders' equity	6,509	6,354
Noncontrolling interests	309	321
Total equity	6,818	6,675
Total liabilities and equity	23,012	23,097
WM [Member]
Current assets:
Cash and cash equivalents	50	60	112	119
Other current assets
Total current assets	50	60
Property and equipment, net
Investments in and advances to affiliates	12,786	12,686
Other assets	42	45
Total assets	12,878	12,791
Current liabilities:
Current portion of long-term debt	563	400
Accounts payable and other current liabilities	126	77
Total current liabilities	689	477
Long-term debt, less current portion	5,680	5,918
Other liabilities		42
Total liabilities	6,369	6,437
Equity:
Stockholders' equity	6,509	6,354
Noncontrolling interests
Total equity	6,509	6,354
Total liabilities and equity	12,878	12,791
WM Holdings [Member]
Current assets:
Cash and cash equivalents
Other current assets	6	7
Total current assets	6	7
Property and equipment, net
Investments in and advances to affiliates	16,454	16,697
Other assets	12	12
Total assets	16,472	16,716
Current liabilities:
Current portion of long-term debt
Accounts payable and other current liabilities	13	13
Total current liabilities	13	13
Long-term debt, less current portion	449	449
Other liabilities
Total liabilities	462	462
Equity:
Stockholders' equity	16,010	16,254
Noncontrolling interests
Total equity	16,010	16,254
Total liabilities and equity	16,472	16,716
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	104	134	125	139
Other current assets	2,244	2,222
Total current assets	2,348	2,356
Property and equipment, net	12,469	12,651
Investments in and advances to affiliates	3,799	3,437
Other assets	8,085	7,966
Total assets	26,701	26,410
Current liabilities:
Current portion of long-term debt	213	343
Accounts payable and other current liabilities	2,107	2,203
Total current liabilities	2,320	2,546
Long-term debt, less current portion	2,865	2,806
Other liabilities	4,178	4,171
Total liabilities	9,363	9,523
Equity:
Stockholders' equity	17,029	16,566
Noncontrolling interests	309	321
Total equity	17,338	16,887
Total liabilities and equity	26,701	26,410
Eliminations [Member]
Current assets:
Cash and cash equivalents
Other current assets
Total current assets
Property and equipment, net
Investments in and advances to affiliates	(33,039)	(32,820)
Other assets
Total assets	(33,039)	(32,820)
Current liabilities:
Current portion of long-term debt
Accounts payable and other current liabilities
Total current liabilities
Long-term debt, less current portion
Other liabilities
Total liabilities
Equity:
Stockholders' equity	(33,039)	(32,820)
Noncontrolling interests
Total equity	(33,039)	(32,820)
Total liabilities and equity	$ (33,039)	$ (32,820)

Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Operating revenues	$ 3,526	$ 3,459	$ 6,862	$ 6,754
Costs and expenses	3,016	2,993	5,950	5,887
Income from operations	510	466	912	867
Other income (expense):
Interest income (expense)	(121)	(120)	(242)	(241)
Equity in earnings of subsidiaries, net of taxes
Other, net	(6)	(12)	(25)	(20)
Total other income (expense)	(127)	(132)	(267)	(261)
Income before income taxes	383	334	645	606
Provision for (benefit from) income taxes	127	115	213	204
Consolidated net income	256	219	432	402
Less: Net income attributable to noncontrolling interests	12	11	20	23
Net income attributable to Waste Management, Inc.	244	208	412	379
WM [Member]
Condensed Financial Statements, Captions [Line Items]
Operating revenues
Costs and expenses
Income from operations
Other income (expense):
Interest income (expense)	(91)	(88)	(180)	(176)
Equity in earnings of subsidiaries, net of taxes	299	262	521	486
Other, net
Total other income (expense)	208	174	341	310
Income before income taxes	208	174	341	310
Provision for (benefit from) income taxes	(36)	(34)	(71)	(69)
Consolidated net income	244	208	412	379
Less: Net income attributable to noncontrolling interests
Net income attributable to Waste Management, Inc.	244	208	412	379
WM Holdings [Member]
Condensed Financial Statements, Captions [Line Items]
Operating revenues
Costs and expenses	1		1
Income from operations	(1)		(1)
Other income (expense):
Interest income (expense)	(8)	(8)	(16)	(16)
Equity in earnings of subsidiaries, net of taxes	305	267	532	496
Other, net
Total other income (expense)	297	259	516	480
Income before income taxes	296	259	515	480
Provision for (benefit from) income taxes	(3)	(3)	(6)	(6)
Consolidated net income	299	262	521	486
Less: Net income attributable to noncontrolling interests
Net income attributable to Waste Management, Inc.	299	262	521	486
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Operating revenues	3,526	3,459	6,862	6,754
Costs and expenses	3,015	2,993	5,949	5,887
Income from operations	511	466	913	867
Other income (expense):
Interest income (expense)	(22)	(24)	(46)	(49)
Equity in earnings of subsidiaries, net of taxes
Other, net	(6)	(12)	(25)	(20)
Total other income (expense)	(28)	(36)	(71)	(69)
Income before income taxes	483	430	842	798
Provision for (benefit from) income taxes	166	152	290	279
Consolidated net income	317	278	552	519
Less: Net income attributable to noncontrolling interests	12	11	20	23
Net income attributable to Waste Management, Inc.	305	267	532	496
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Operating revenues
Costs and expenses
Income from operations
Other income (expense):
Interest income (expense)
Equity in earnings of subsidiaries, net of taxes	(604)	(529)	(1,053)	(982)
Other, net
Total other income (expense)	(604)	(529)	(1,053)	(982)
Income before income taxes	(604)	(529)	(1,053)	(982)
Provision for (benefit from) income taxes
Consolidated net income	(604)	(529)	(1,053)	(982)
Less: Net income attributable to noncontrolling interests
Net income attributable to Waste Management, Inc.	$ (604)	$ (529)	$ (1,053)	$ (982)

Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Comprehensive income	$ 230	$ 176	$ 373	$ 393
Less: Comprehensive income attributable to noncontrolling interests	12	11	20	23
Comprehensive income attributable to Waste Management, Inc.	218	165	353	370
WM [Member]
Condensed Financial Statements, Captions [Line Items]
Comprehensive income	252	190	422	366
Less: Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Waste Management, Inc.	252	190	422	366
WM Holdings [Member]
Condensed Financial Statements, Captions [Line Items]
Comprehensive income	299	262	521	486
Less: Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Waste Management, Inc.	299	262	521	486
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Comprehensive income	283	253	483	523
Less: Comprehensive income attributable to noncontrolling interests	12	11	20	23
Comprehensive income attributable to Waste Management, Inc.	271	242	463	500
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Comprehensive income	(604)	(529)	(1,053)	(982)
Less: Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Waste Management, Inc.	$ (604)	$ (529)	$ (1,053)	$ (982)

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Consolidated net income	$ 256	$ 219	$ 432	$ 402
Equity in earnings of subsidiaries, net of taxes
Other adjustments			690	742
Net cash provided by operating activities			1,122	1,144
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired			(210)	(154)
Capital expenditures			(501)	(730)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets			74	20
Net receipts from restricted trust and escrow accounts and other, net			(56)	(39)
Net cash used in investing activities			(693)	(903)
Cash flows from financing activities:
New borrowings			71	312
Debt repayments			(268)	(271)
Cash dividends			(341)	(329)
Exercise of common stock options			98	31
Distributions paid to noncontrolling interests and other			(25)	(5)
(Increase) decrease in intercompany and investments, net
Net cash used in financing activities			(465)	(262)
Effect of exchange rate changes on cash and cash equivalents			(4)
Increase (decrease) in cash and cash equivalents			(40)	(21)
Cash and cash equivalents at beginning of period			194	258
Cash and cash equivalents at end of period	154	237	154	237
WM [Member]
Cash flows from operating activities:
Consolidated net income	244	208	412	379
Equity in earnings of subsidiaries, net of taxes	(299)	(262)	(521)	(486)
Other adjustments			14	91
Net cash provided by operating activities			(95)	(16)
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired
Capital expenditures
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets
Net receipts from restricted trust and escrow accounts and other, net
Net cash used in investing activities
Cash flows from financing activities:
New borrowings				150
Debt repayments			(65)	(35)
Cash dividends			(341)	(329)
Exercise of common stock options			98	31
Distributions paid to noncontrolling interests and other			7	9
(Increase) decrease in intercompany and investments, net			386	183
Net cash used in financing activities			85	9
Effect of exchange rate changes on cash and cash equivalents
Increase (decrease) in cash and cash equivalents			(10)	(7)
Cash and cash equivalents at beginning of period			60	119
Cash and cash equivalents at end of period	50	112	50	112
WM Holdings [Member]
Cash flows from operating activities:
Consolidated net income	299	262	521	486
Equity in earnings of subsidiaries, net of taxes	(305)	(267)	(532)	(496)
Other adjustments
Net cash provided by operating activities			(11)	(10)
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired
Capital expenditures
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets
Net receipts from restricted trust and escrow accounts and other, net
Net cash used in investing activities
Cash flows from financing activities:
New borrowings
Debt repayments
Cash dividends
Exercise of common stock options
Distributions paid to noncontrolling interests and other
(Increase) decrease in intercompany and investments, net			11	10
Net cash used in financing activities			11	10
Effect of exchange rate changes on cash and cash equivalents
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Consolidated net income	317	278	552	519
Equity in earnings of subsidiaries, net of taxes
Other adjustments			676	651
Net cash provided by operating activities			1,228	1,170
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired			(210)	(154)
Capital expenditures			(501)	(730)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets			74	20
Net receipts from restricted trust and escrow accounts and other, net			(56)	(39)
Net cash used in investing activities			(693)	(903)
Cash flows from financing activities:
New borrowings			71	162
Debt repayments			(203)	(236)
Cash dividends
Exercise of common stock options
Distributions paid to noncontrolling interests and other			(32)	(14)
(Increase) decrease in intercompany and investments, net			(397)	(193)
Net cash used in financing activities			(561)	(281)
Effect of exchange rate changes on cash and cash equivalents			(4)
Increase (decrease) in cash and cash equivalents			(30)	(14)
Cash and cash equivalents at beginning of period			134	139
Cash and cash equivalents at end of period	104	125	104	125
Eliminations [Member]
Cash flows from operating activities:
Consolidated net income	(604)	(529)	(1,053)	(982)
Equity in earnings of subsidiaries, net of taxes	604	529	1,053	982
Other adjustments
Net cash provided by operating activities
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired
Capital expenditures
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets
Net receipts from restricted trust and escrow accounts and other, net
Net cash used in investing activities
Cash flows from financing activities:
New borrowings
Debt repayments
Cash dividends
Exercise of common stock options
Distributions paid to noncontrolling interests and other
(Increase) decrease in intercompany and investments, net
Net cash used in financing activities
Effect of exchange rate changes on cash and cash equivalents
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period

Subsequent Event - Additional Information (Detail) $ in Millions, $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2013 USD ($)	Jun. 30, 2013	Jul. 31, 2013 CAD ($)	Dec. 31, 2012
Canadian credit facility [Member]
Subsequent Event [Line Items]
Weighted average interest rate		2.70%		2.90%
End period of maturity for debt instruments		Nov. 07, 2017
Revolving credit facility [Member]
Subsequent Event [Line Items]
Weighted average interest rate		1.40%		1.40%
End period of maturity for debt instruments		May 09, 2016
RCI Environnement Inc [Member] \| Canadian credit facility [Member]
Subsequent Event [Line Items]
Weighted average interest rate		2.70%
End period of maturity for debt instruments		Nov. 07, 2017
RCI Environnement Inc [Member] \| Revolving credit facility [Member]
Subsequent Event [Line Items]
Weighted average interest rate		1.40%
Subsequent event [Member]
Subsequent Event [Line Items]
End period of maturity for debt instruments	Jul. 26, 2018
Subsequent event [Member] \| RCI Environnement Inc [Member]
Subsequent Event [Line Items]
Total consideration paid, inclusive of amounts for estimated working capital	$ 481		$ 509
Agreed upon purchase price at acquisition date	$ 454		480
Name of acquired entity	RCI Environnement Inc.
Subsequent event [Member] \| RCI Environnement Inc [Member] \| Canadian credit facility [Member]
Subsequent Event [Line Items]
Cash proceeds from a term loan to fund acquisition	$ 473		$ 500