Waste Management (WM) 10-Q 27 Jul 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 18, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Trading Symbol	WM
Entity Registrant Name	WASTE MANAGEMENT INC
Entity Central Index Key	823,768
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		442,288,938

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 39	$ 39
Accounts receivable, net of allowance for doubtful accounts of $21 and $25, respectively	1,650	1,549
Other receivables	373	545
Parts and supplies	93	92
Other assets	121	120
Total current assets	2,276	2,345
Property and equipment, net of accumulated depreciation and amortization of $16,820 and $16,420, respectively	10,841	10,665
Goodwill	6,230	5,984
Other intangible assets, net	632	477
Investments in unconsolidated entities	321	360
Other assets	452	536
Total assets	20,752	20,367
Current liabilities:
Accounts payable	620	721
Accrued liabilities	1,089	1,064
Deferred revenues	483	472
Current portion of long-term debt	614	253
Total current liabilities	2,806	2,510
Long-term debt, less current portion	8,916	8,676
Deferred income taxes	1,395	1,391
Landfill and environmental remediation liabilities	1,622	1,584
Other liabilities	785	839
Total liabilities	15,524	15,000
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	4,802	4,827
Retained earnings	7,116	6,939
Accumulated other comprehensive income (loss)	(49)	(127)
Treasury stock at cost, 188,540,093 and 183,105,326 shares, respectively	(6,667)	(6,300)
Total Waste Management, Inc. stockholders' equity	5,208	5,345
Noncontrolling interests	20	22
Total equity	5,228	5,367
Total liabilities and equity	$ 20,752	$ 20,367

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 21	$ 25
Accumulated depreciation and amortization	$ 16,820	$ 16,420
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	188,540,093	183,105,326

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Operating revenues	$ 3,425	$ 3,315	$ 6,601	$ 6,355
Costs and expenses:
Operating	2,130	2,163	4,123	4,109
Selling, general and administrative	340	322	702	670
Depreciation and amortization	340	322	652	614
Restructuring	2	4	4	5
Expense from divestitures, asset impairments and unusual items	2	2	1	15
Total costs and expenses	2,814	2,813	5,482	5,413
Income from operations	611	502	1,119	942
Other income (expense):
Interest expense, net	(93)	(95)	(188)	(199)
Loss on early extinguishment of debt	(3)	(2)	(4)	(552)
Equity in net losses of unconsolidated entities	(16)	(15)	(23)	(23)
Other, net	(40)	(1)	(49)	(1)
Total other income (expense)	(152)	(113)	(264)	(775)
Income (loss) before income taxes	459	389	855	167
Provision for income taxes	173	116	313	25
Consolidated net income	286	273	542	142
Less: Net income (loss) attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Net income attributable to Waste Management, Inc.	$ 287	$ 274	$ 545	$ 145
Basic earnings per common share	$ 0.65	$ 0.60	$ 1.22	$ 0.32
Diluted earnings per common share	0.64	0.60	1.22	0.32
Cash dividends declared per common share	$ 0.410	$ 0.385	$ 0.820	$ 0.770

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 286	$ 273	$ 542	$ 142
Derivative instruments, net	2	2	9	5
Available-for-sale securities, net	1	1	2	1
Foreign currency translation adjustments	6	13	67	(63)
Other comprehensive income (loss), net of taxes	9	16	78	(57)
Comprehensive income	295	289	620	85
Less: Comprehensive income (loss) attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Comprehensive income attributable to Waste Management, Inc.	$ 296	$ 290	$ 623	$ 88

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Consolidated net income	$ 542	$ 142
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	652	614
Deferred income tax benefit	(14)	(42)
Interest accretion on landfill liabilities	44	43
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets	8	1
Provision for bad debts	18	18
Equity-based compensation expense	51	30
Excess tax benefits associated with equity-based transactions	(17)	(9)
Net gain from disposal of assets	(10)	(6)
Expense from divestitures, asset impairments and unusual items and other, net	42	15
Equity in net losses of unconsolidated entities, net of dividends	23	23
Loss on early extinguishment of debt	4	552
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	66	(18)
Other current assets	(8)	11
Other assets	75	(21)
Accounts payable and accrued liabilities	17	(53)
Deferred revenues and other liabilities	(39)	15
Net cash provided by operating activities	1,454	1,315
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(572)	(454)
Capital expenditures	(629)	(529)
Proceeds from divestitures of businesses and other assets (net of cash divested)	24	78
Net receipts from restricted trust and escrow accounts		35
Other, net	(9)	(9)
Net cash used in investing activities	(1,186)	(879)
Cash flows from financing activities:
New borrowings	2,094	1,866
Debt repayments	(1,517)	(2,181)
Premiums paid on early extinguishment of debt	(2)	(555)
Common stock repurchases	(500)	(300)
Cash dividends	(364)	(351)
Exercise of common stock options	44	47
Excess tax benefits associated with equity-based transactions	17	9
Other, net	(41)	(4)
Net cash used in financing activities	(269)	(1,469)
Effect of exchange rate changes on cash and cash equivalents	1	(1)
Decrease in cash and cash equivalents		(1,034)
Cash and cash equivalents at beginning of period	39	1,307
Cash and cash equivalents at end of period	$ 39	$ 273

Condensed Consolidated Stateme7

Condensed Consolidated Statement of Changes in Equity (Unaudited) - 6 months ended Jun. 30, 2016 - 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, 2015	$ 5,367	$ 6	$ 4,827	$ 6,939	$ (127)	$ (6,300)	$ 22
Beginning balance, shares at Dec. 31, 2015		630,282				(183,105)
Consolidated net income	542			545			(3)
Other comprehensive income (loss), net of taxes	78				78
Cash dividends declared	(364)			(364)
Equity-based compensation transactions, including dividend equivalents, net of taxes	102		23	(4)		$ 83
Equity-based compensation transactions, including dividend equivalents, net of taxes, shares						2,405
Common stock repurchases	(500)		(50)			$ (450)
Common stock repurchases, shares						(7,843)
Other	3		2				1
Other, shares						3
Ending balance at Jun. 30, 2016	$ 5,228	$ 6	$ 4,802	$ 7,116	$ (49)	$ (6,667)	$ 20
Ending balance, shares at Jun. 30, 2016		630,282				(188,540)

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2016
Accounting Policies [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, and Waste Management’s wholly-owned and majority-owned subsidiaries. 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. and its consolidated subsidiaries. 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 landfill gas-to-energy facilities in the United States. We evaluate, oversee and manage the financial performance of our Solid Waste business subsidiaries through our 17 geographic Areas. We also provide additional services that are not managed through our Solid Waste business, which are presented in this report as “Other.” Additional information related to our segments is included in Note 8. The Condensed Consolidated Financial Statements as of June 30, 2016 and for the three and six months ended June 30, 2016 and 2015 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, 2015. 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 precision from available data or simply cannot be calculated. In some cases, these estimates are 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 Standards Debt Issuance Costs Consolidation Reclassifications When necessary, reclassifications have been made to our prior period consolidated financial information in order to conform to the current year presentation.

Landfill and Environmental Reme

Landfill and Environmental Remediation Liabilities	6 Months Ended
	Jun. 30, 2016
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, 2016 December 31, 2015 Landfill Environmental Remediation Total Landfill Environmental Remediation Total Current (in accrued liabilities) $ 116 $ 31 $ 147 $ 112 $ 31 $ 143 Long-term 1,440 182 1,622 1,406 178 1,584 $ 1,556 $ 213 $ 1,769 $ 1,518 $ 209 $ 1,727 The changes to landfill and environmental remediation liabilities for the six months ended June 30, 2016 are reflected in the table below (in millions): Landfill Environmental Remediation December 31, 2015 $ 1,518 $ 209 Obligations incurred and capitalized 29 — Obligations settled (40 ) (10 ) Interest accretion 44 2 Revisions in estimates and interest rate assumptions(a) 1 12 Acquisitions, divestitures and other adjustments 4 — June 30, 2016 $ 1,556 $ 213 (a) The amount reported in 2016 for our environmental remediation liabilities includes the impact of a decrease in the risk-free discount rate used to measure our liabilities from 2.25% at December 31, 2015 to 1.50% at June 30, 2016, resulting in an increase of $9 million to our environmental remediation liabilities and a corresponding increase to “Operating” expenses. 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

Debt	6 Months Ended
	Jun. 30, 2016
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, 2016: June 30, 2016 December 31, 2015 $2.25 billion revolving credit facility, maturing July 2020 $ — $ 20 Letter of credit facilities, maturing through December 2018 — — Canadian credit facility and term loan, maturing March 2019 (weighted average effective interest rate of 2.0% at June 30, 2016 and 2.2% at December 31, 2015) 313 84 Senior notes maturing through 2045, interest rates ranging from 2.4% to 7.75% (weighted average interest rate of 4.5% at June 30, 2016 and 4.7% at December 31, 2015) 6,534 6,050 Tax-exempt bonds, maturing through 2045, fixed and variable interest rates ranging from 0.45% to 5.7% (weighted average interest rate of 1.7% at June 30, 2016 and 1.9% at December 31, 2015) 2,350 2,447 Capital leases and other, maturing through 2055, interest rates up to 12% 333 328 9,530 8,929 Current portion of long-term debt 614 253 $ 8,916 $ 8,676 Debt Classification As of June 30, 2016, our current debt balances include (i) $500 million of 2.6% senior notes that mature in September 2016 and (ii) $114 million of other debt with scheduled maturities within the next 12 months, including $48 million of tax-exempt bonds. As of June 30, 2016, we also have $454 million of tax-exempt bonds with term interest rate periods that expire within the next 12 months and an additional $491 million of variable-rate tax-exempt bonds that are supported by letters of credit. The interest rates on our variable-rate bonds are generally reset on either a daily or weekly basis through a remarketing process. All recent tax-exempt bond remarketings have successfully placed Company bonds with investors at market-driven rates and we currently expect future remarketings to be successful. However, if the remarketing agent is unable to remarket our bonds, the remarketing agent can put the bonds to us. In the event of a failed remarketing, we have the intent and ability to use availability under our long-term U.S. revolving credit facility (“$2.25 billion revolving credit facility”) to fund the debt obligations until they can be remarketed successfully. Accordingly, we classified these borrowings as long-term in our Condensed Consolidated Balance Sheet at June 30, 2016. Access to and Utilization of Credit Facilities $2.25 Billion Revolving Credit Facility and Other Letter of Credit Facilities — Canadian Term Loan and Revolving Credit Facility — Debt Borrowings and Repayments $2.25 Billion Revolving Credit Facility Canadian Term Loan Senior Notes Tax-Exempt Bonds — Senior Notes Refinancing During the six months ended June 30, 2015, we recognized a pre-tax loss of $552 million associated with the early extinguishment of almost $2 billion of our high-coupon senior notes through make-whole redemption and cash tender offers. We replaced substantially all of the debt extinguished with new senior notes at significantly lower coupon interest rates and extended the weighted average duration of these debt obligations.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	4. Derivative Instruments and Hedging Activities Cash Flow Hedges Foreign Currency Derivatives These cross currency swaps had been designated as cash flow hedges and as of December 31, 2015, the carrying value of the hedge position was reflected in our Condensed Consolidated Balance Sheet as $15 million of current other assets and $63 million of long-term other assets. Through March 2016, when the intercompany loans and the related hedges were terminated, gains or losses resulting from the remeasurement of the underlying non-functional currency intercompany loans were recognized in current earnings in the same financial statement line item as the offsetting gains or losses on the related cross currency swaps. There was no significant ineffectiveness associated with our cash flow hedges during the reported periods. Forward-Starting Interest Rate Swaps Refer to Note 11 for information regarding the impacts of our cash flow derivatives on our comprehensive income and results of operations.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	5. Income Taxes Our effective income tax rate for the three and six months ended June 30, 2016 was 37.6% and 36.5%, respectively, compared with 29.6% and 14.5%, 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 difference between federal income taxes computed at the federal statutory rate and reported income taxes for the three and six months ended June 30, 2016 was primarily due to the unfavorable impact of nondeductible investment impairments and state and local income taxes offset, in part, by the favorable impact of federal tax credits and tax audit settlements. The difference between federal income taxes computed at the federal statutory rate and reported income taxes for the three and six months ended June 30, 2015 was primarily due to the favorable impact of federal tax credits, revaluation of our deferred taxes and utilization of state net operating losses resulting from changes in state law and nontaxable post-closing adjustments related to the divestiture of our Wheelabrator business offset, in part, by the unfavorable impact of state and local income taxes. In addition, the loss on early extinguishment of debt included in our pre-tax income for the six months ended June 30, 2015 contributed to a lower effective tax rate. Investments Qualifying for Federal Tax Credits We account for our investments in these entities using the equity method of accounting, recognizing our share of each entity’s results of operations and other reductions in the value of our investments in “Equity in net losses of unconsolidated entities,” within our Condensed Consolidated Statements of Operations. During the three and six months ended June 30, 2016, we recognized $9 million and $15 million of net losses and a reduction in our tax provision of $14 million and $25 million, respectively, primarily as a result of tax credits realized from these investments. In addition, during the three and six months ended June 30, 2016, we recognized interest expense of $1 million and $2 million, respectively, associated with the low-income housing investments. During the three and six months ended June 30, 2015, we recognized $7 million and $14 million of net losses and a reduction in our tax provision of $13 million and $24 million, respectively, primarily as a result of tax credits realized from these investments. In addition, during the three and six months ended June 30, 2015, we recognized interest expense of $1 million and $2 million, respectively, associated with the low-income housing investments. See Note 14 for additional information related to these unconsolidated variable interest entities.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2016
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, 2016 2015 2016 2015 Number of common shares outstanding at end of period 441.7 451.8 441.7 451.8 Effect of using weighted average common shares outstanding 2.3 3.7 3.3 5.2 Weighted average basic common shares outstanding 444.0 455.5 445.0 457.0 Dilutive effect of equity-based compensation awards and other contingently issuable shares 2.7 2.5 2.5 2.6 Weighted average diluted common shares outstanding 446.7 458.0 447.5 459.6 Potentially issuable shares 10.1 11.2 10.1 11.2 Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 0.5 2.3 0.8 2.3

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies Financial Instruments 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 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 used. 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 We also have guaranteed the obligations and certain performance requirements of, and provided indemnification to, third parties in connection with both consolidated and unconsolidated entities. Guarantee agreements outstanding as of June 30, 2016 (excluding those related to Wheelabrator obligations that are discussed below) include agreements guaranteeing certain market value losses for approximately 850 homeowners’ properties adjacent to or near 21 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. In December 2014, we sold our Wheelabrator business, which provides waste-to-energy services and manages waste-to-energy facilities and independent power production plants. Before the divestiture of our Wheelabrator business, WM had guaranteed certain operational and financial performance obligations of Wheelabrator and its subsidiaries in the ordinary course of business. In conjunction with the divestiture, certain WM guarantees of Wheelabrator obligations were terminated, but others continued and are now guarantees of third-party obligations. Wheelabrator is working with the various third-party beneficiaries to release WM from these guarantees, but until they are successful, WM has agreed to retain the guarantees and, in exchange, receive a credit support fee. The most significant of these guarantees specifically define WM’s maximum financial obligation over the course of the relevant agreements, and as of June 30, 2016 and December 31, 2015, WM’s maximum future payments under these guarantees were $106 million. WM’s exposure under certain of the performance guarantees is variable and a maximum exposure is not defined. We have recorded the fair value of the operational and financial performance guarantees, some of which could extend through 2038 if not terminated, in our Condensed Consolidated Balance Sheets. The estimated fair value of WM’s potential obligation associated with guarantees of Wheelabrator obligations (net of credit support fee) at June 30, 2016 and December 31, 2015 was $12 million and $13 million, respectively. We currently do not expect the financial impact of such operational and financial performance guarantees to materially exceed the recorded fair value. Environmental Matters 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 $195 million higher than the $213 million recorded in the Condensed Consolidated Financial Statements as of June 30, 2016. 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, 2016, we had been notified by the government that we are a PRP in connection with 75 locations listed on the EPA’s Superfund National Priorities List, or NPL. Of the 75 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 60 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 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. Waste Management of Hawaii, Inc. (“WMHI”) may face civil claims from the Hawaii Department of Health and/or the EPA based upon water discharges at the Waimanalo Gulch Sanitary Landfill, which WMHI operates for the city and county of Honolulu, following three major rainstorms in December 2010 and January 2011. We do not anticipate such claims could have a material adverse effect on the Company’s business, financial condition, results of operations or cash flows. Litigation 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 agreements 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 agreements inherently involves 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 or was 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, the Company has direct contractual obligations to provide indemnification to each of the members of WM’s Board of Directors and each of our executive officers and senior vice presidents. The Company may incur substantial expenses in connection with the fulfillment of its advancement of costs and indemnification obligations in connection with actions or proceedings that may be brought against its former or current officers, directors and employees. Multiemployer Defined Benefit Pension Plans In the second quarter of 2015, we recognized a $55 million charge to “Operating” expenses associated with the withdrawal from the Central States, Southeast and Southwest Areas Pension Plan and the Teamsters Employers Local 945 Pension Fund. Tax Matters

Segment and Related Information

Segment and Related Information	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Segment and Related Information	8. Segment and Related Information We evaluate, oversee and manage the financial performance of our Solid Waste subsidiaries through our 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 have evaluated the aggregation criteria and concluded that, based on 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, 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’ income from operations margins. The economic variations experienced by our Areas are 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. Annually, we analyze the Areas’ income from operations margins for purposes of segment reporting and in the fourth quarter of 2015, we realigned our Solid Waste tiers to reflect changes in their relative economic characteristics and prospects. These changes are the results of various factors including acquisitions, divestments, business mix and the economic climate of various geographies. Reclassifications have been made to our prior period consolidated financial information in order to conform to the current year presentation. Tier 1 is now comprised of our operations across the Southern United States, with the exception of Southern California and the Florida peninsula and also includes the New England states, the tri-state area of Michigan, Indiana and Ohio and Western Canada. Tier 2 includes Southern California, Eastern Canada, Wisconsin, Minnesota and a portion of the lower Mid-Atlantic region of the United States. Tier 3 encompasses all the remaining operations including the Pacific Northwest and Northern California, the majority of the Mid-Atlantic region of the United States, the Florida peninsula, Illinois and Missouri. The operating segments not evaluated and overseen through the 17 Areas 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 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, 2016 Solid Waste: Tier 1 $ 1,316 $ (229 ) $ 1,087 $ 362 Tier 2 856 (158 ) 698 157 Tier 3 1,347 (233 ) 1,114 235 Solid Waste 3,519 (620 ) 2,899 754 Other 572 (46 ) 526 (20 ) 4,091 (666 ) 3,425 734 Corporate and Other — — — (123 ) Total $ 4,091 $ (666 ) $ 3,425 $ 611 June 30, 2015 Solid Waste: Tier 1 $ 1,292 $ (218 ) $ 1,074 $ 297 Tier 2 853 (162 ) 691 151 Tier 3 1,264 (215 ) 1,049 182 Solid Waste 3,409 (595 ) 2,814 630 Wheelabrator — — — 8 Other 525 (24 ) 501 (17 ) 3,934 (619 ) 3,315 621 Corporate and Other — — — (119 ) Total $ 3,934 $ (619 ) $ 3,315 $ 502 Gross Operating Revenues Intercompany Operating Revenues Net Operating Revenues Income from Operations Six Months Ended: June 30, 2016 Solid Waste: Tier 1 $ 2,557 $ (441 ) $ 2,116 $ 696 Tier 2 1,637 (300 ) 1,337 302 Tier 3 2,607 (445 ) 2,162 443 Solid Waste 6,801 (1,186 ) 5,615 1,441 Other 1,072 (86 ) 986 (56 ) 7,873 (1,272 ) 6,601 1,385 Corporate and Other — — — (266 ) Total $ 7,873 $ (1,272 ) $ 6,601 $ 1,119 June 30, 2015 Solid Waste: Tier 1 $ 2,487 $ (408 ) $ 2,079 $ 593 Tier 2 1,633 (305 ) 1,328 290 Tier 3 2,386 (395 ) 1,991 360 Solid Waste 6,506 (1,108 ) 5,398 1,243 Wheelabrator — — — 1 Other 1,003 (46 ) 957 (40 ) 7,509 (1,154 ) 6,355 1,204 Corporate and Other — — — (262 ) Total $ 7,509 $ (1,154 ) $ 6,355 $ 942 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 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. Service disruptions caused by severe storms, extended periods of inclement weather or climate extremes can significantly affect the operating results of the affected Areas. On the other hand, 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 United States, 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 as a result of significant start-up costs and other factors, such revenue can generate earnings at comparatively lower margins.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Acquisitions	9. Acquisitions Southern Waste Systems/Sun Recyclin We have provisionally recorded $93 million of property and equipment, $182 million of other intangible assets and $250 million of goodwill. The completion of our acquisition accounting is subject to change based on the finalization of our detailed valuations. There have been no adjustments to the preliminary purchase price allocation since the acquisition date. The goodwill allocation was calculated as the excess of the consideration paid over the net assets recognized and represents the future economic benefits expected to arise from other assets acquired that could not be individually identified and separately recognized. Goodwill has been assigned to our Florida Area as it is expected to benefit from the synergies of the combination. Goodwill related to this acquisition is deductible for income tax purposes. The following table presents the preliminary allocation of the purchase price for SWS to other intangible assets (amounts in millions, except for amortization periods): Amount Weighted Average Amortization Periods (in Years) Customer relationships $ 160 10.0 Noncompete agreements 18 5.0 Trade name 4 10.0 Total other intangible assets subject to amortization $ 182 9.5 For the three and six months ended June 30, 2016, the acquired operations of SWS contributed revenues of $39 million and $76 million, respectively, and net income of less than $1 million and $1 million, respectively, which are included in our Condensed Consolidated Statements of Operations. Deffenbaugh Disposal, Inc. The following pro forma consolidated results of operations have been prepared as if the acquisitions of Deffenbaugh and SWS occurred at January 1, 2015 (in millions, except per share amounts): Three Months Ended Six Months Ended June 30, 2015 2016 2015 Operating revenues $ 3,350 $ 6,603 $ 6,461 Net income attributable to Waste Management, Inc. 274 545 144 Basic earnings per common share 0.60 1.23 0.31 Diluted earnings per common share 0.60 1.22 0.31

Asset Impairments and Unusual I

Asset Impairments and Unusual Items	6 Months Ended
	Jun. 30, 2016
Extraordinary and Unusual Items [Abstract]
Asset Impairments and Unusual Items	10. Asset Impairments and Unusual Items Expense from divestitures, asset impairments and unusual items During the six months ended June 30, 2015, we recognized net charges of $15 million, including $16 million of charges to write down or divest of certain assets in our recycling operations and a $5 million impairment charge related to a landfill in our Western Canada Area. Partially offsetting these charges was a $6 million gain on the sale of an oil and gas producing property. Other income (expense) During the second quarter of 2016, we recognized $41 million of impairments to write down minority-owned investments in waste diversion technology companies to their fair value. These charges are recorded in “Other, net” in our Condensed Consolidated Statement of Operations.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	11. Accumulated Other Comprehensive Income (Loss) The changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, which is included as a component of Waste Management, Inc. stockholders’ equity, are as follows (in millions, with amounts in parentheses representing decreases to accumulated other comprehensive income): Derivative Instruments Available- for-Sale Securities Foreign Currency Translation Adjustments Post- Retirement Benefit Plans Total Balance, December 31, 2015 $ (52 ) $ 8 $ (75 ) $ (8 ) $ (127 ) Other comprehensive income (loss) before reclassifications net of tax expense (benefit) of $(4), $1, $0 and $0, respectively (7 ) 2 67 — 62 Amounts reclassified from accumulated other comprehensive (income) loss net of tax (expense) benefit of $10, $0, $0 and $0, respectively 16 — — — 16 Net current period other comprehensive income (loss) 9 2 67 — 78 Balance, June 30, 2016 $ (43 ) $ 10 $ (8 ) $ (8 ) $ (49 ) The amounts of other comprehensive income (loss) before reclassifications associated with the effective portion of derivatives designated as cash flow hedges are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Foreign currency derivatives $ — $ (3 ) $ (11 ) $ 21 Tax (expense) benefit — 1 4 (8 ) Net of tax $ — $ (2 ) $ (7 ) $ 13 The significant amounts reclassified out of each component of accumulated other comprehensive income (loss) are as follows (in millions, with amounts in parentheses representing debits to the statement of operations classification): Three Months Ended Six Months Ended Statement of Operations Classification 2016 2015 2016 2015 Gains and losses on cash flow hedges: Forward-starting interest rate swaps $ (3 ) $ (2 ) $ (6 ) $ (5 ) Interest expense, net Treasury rate locks — — — (3 ) Interest expense, net Foreign currency derivatives — (5 ) (20 ) 21 Other, net (3 ) (7 ) (26 ) 13 Total before tax 1 3 10 (5 ) Tax (expense) benefit Total reclassifications for the period $ (2 ) $ (4 ) $ (16 ) $ 8 Net of tax

Share Repurchases

Share Repurchases	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Share Repurchases	12. Share Repurchases Our share repurchases have been made in accordance with financial plans approved by our Board of Directors. The Company entered into an accelerated share repurchase (“ASR”) agreement in December 2015 to repurchase $150 million of our common stock in early 2016. In January 2016, we delivered $150 million in cash and received 2.0 million shares based on a stock price of $53.37. The ASR agreement completed in February 2016, at which time we received 0.9 million additional shares based on a final weighted average per share purchase price during the repurchase period of $53.15. In March 2016, the Company entered into an ASR agreement to repurchase $100 million of our common stock. At the beginning of the ASR repurchase period, we delivered $100 million in cash and received 1.2 million shares based on a stock price of $56.95. The ASR agreement completed in April 2016, at which time we received 0.5 million additional shares based on a final weighted average per share purchase price during the repurchase period of $58.33. In May 2016, the Company entered into an ASR agreement to repurchase $250 million of our common stock. At the beginning of the ASR repurchase period, we delivered $250 million in cash and received 3.3 million shares based on a stock price of $60.49. The final number of shares to be repurchased and the final average price per share under the ASR agreement will depend on the volume-weighted average price of our stock, less a discount, during the term of the agreement. Purchases under the ASR agreement are expected to be completed in August 2016. After completion of these ASRs, the Company has Board authorization remaining for $650 million of future share repurchases. Any future share repurchases pursuant to such authorization will be made at the discretion of management. Each ASR agreement was accounted for as two separate transactions: (i) as shares of reacquired common stock for the shares delivered to us upon effectiveness of the ASR agreements and (ii) as a forward contract indexed to our own common stock for the undelivered shares. The initial delivery of shares is included in treasury stock at cost and resulted in an immediate reduction of the outstanding shares used to calculate the weighted average common shares outstanding for basic and diluted earnings per share. The forward contracts indexed to our own stock met the criteria for equity classification, and these amounts are initially recorded in additional paid-in capital and reclassified to treasury stock upon completion of the ASR agreement.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2016
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, 2016 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 $ 40 $ 40 $ — $ — Available-for-sale securities 45 — 45 — Fixed-income securities 36 — 36 — Redeemable preferred stock 48 — — 48 Total assets $ 169 $ 40 $ 81 $ 48 Fair Value Measurements at December 31, 2015 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 $ 35 $ 35 $ — $ — Available-for-sale securities 43 — 43 — Fixed-income securities 40 — 40 — Foreign currency derivatives(b) 78 — 78 — Redeemable preferred stock 47 — — 47 Total assets $ 243 $ 35 $ 161 $ 47 (a) When available, 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. 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 analysis, third-party appraisals or industry multiples and public comparables. There has not been any significant change in the fair value of the redeemable preferred stock since our assessment at December 31, 2015. (b) In March 2016, we terminated our foreign currency derivatives. Refer to Note 4 for additional information. Fair Value of Debt At June 30, 2016 and December 31, 2015, the carrying value of our debt was approximately $9.5 billion and $8.9 billion, respectively. The estimated fair value of our debt was approximately $10.4 billion and $9.2 billion at June 30, 2016 and December 31, 2015, respectively. The fair value of our fixed-rate debt is estimated using discounted cash flow analysis, based on current market rates for similar types of instruments. The carrying value of our variable-rate debt approximates fair value due to the short-term nature of the interest rates. The increase in the fair value of our debt when comparing June 30, 2016 with December 31, 2015 is primarily related to $577 million of net borrowings during 2016, as well as recent decreases in long-term interest rates. 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, 2016 and December 31, 2015. These amounts have not been revalued since those dates, and current estimates of fair value could differ significantly from the amounts presented.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [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 that represent a significant interest in an unconsolidated entity and (ii) trusts for final capping, closure, post-closure or environmental remediation obligations. Significant Unconsolidated Variable Interest Entities We have significant financial interests in entities established to invest in and manage low-income housing properties and a refined coal facility. We support the operations of these entities in exchange for a pro-rata share of the tax credits they generate. We have determined we are not the primary beneficiary of these entities as we do not have the power to individually direct the activities of these entities. Accordingly, we account for these investments under the equity method of accounting and do not consolidate them. As of June 30, 2016 and December 31, 2015, our aggregate investment balance in these two entities was $98 million and $110 million, respectively. The debt balance related to our investment in low-income housing properties was $68 million and $80 million at June 30, 2016 and December 31, 2015, respectively. Additional information related to these investments 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 certain 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 Sheets. We reflect our interests in the unrealized gains and losses on available-for-sale 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.

Condensed Consolidating Financi

Condensed Consolidating Financial Statements	6 Months Ended
	Jun. 30, 2016
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, 2016 (Unaudited) WM WM Holdings Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ — $ — $ 39 $ — $ 39 Other current assets 6 7 2,224 — 2,237 6 7 2,263 — 2,276 Property and equipment, net — — 10,841 — 10,841 Investments in and advances to affiliates(a) 19,194 19,628 7,490 (46,312 ) — Other assets 15 30 7,590 — 7,635 Total assets $ 19,215 $ 19,665 $ 28,184 $ (46,312 ) $ 20,752 LIABILITIES AND EQUITY Current liabilities: Current portion of long-term debt $ 500 $ — $ 114 $ — $ 614 Accounts payable and other current liabilities 84 11 2,097 — 2,192 584 11 2,211 — 2,806 Long-term debt, less current portion(a) 6,073 304 2,539 — 8,916 Due to affiliates(a) 7,334 156 — (7,490 ) — Other liabilities 16 — 3,786 — 3,802 Total liabilities 14,007 471 8,536 (7,490 ) 15,524 Equity: Stockholders’ equity 5,208 19,194 19,628 (38,822 ) 5,208 Noncontrolling interests — — 20 — 20 5,208 19,194 19,648 (38,822 ) 5,228 Total liabilities and equity $ 19,215 $ 19,665 $ 28,184 $ (46,312 ) $ 20,752 (a) In conjunction with the preparation of our June 30, 2016 Condensed Consolidating Balance Sheet, we identified and corrected the presentation of $126 million of tax-exempt bonds previously reported in Non-Guarantor Subsidiaries’ rather than WM’s “Long-term debt, less current portion,” which had corresponding impacts on “Investments in and advances to affiliates” and “Due to affiliates.” This immaterial correction has been reflected in our June 30, 2016 Condensed Consolidating Financial Statements. CONDENSED CONSOLIDATING BALANCE SHEETS (Continued) December 31, 2015 WM WM Holdings Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ — $ — $ 39 $ — $ 39 Other current assets 3 6 2,297 — 2,306 3 6 2,336 — 2,345 Property and equipment, net — — 10,665 — 10,665 Investments in and advances to affiliates 18,557 18,911 7,365 (44,833 ) — Other assets 23 29 7,305 — 7,357 Total assets $ 18,583 $ 18,946 $ 27,671 $ (44,833 ) $ 20,367 LIABILITIES AND EQUITY Current liabilities: Current portion of long-term debt $ 41 $ — $ 212 $ — $ 253 Accounts payable and other current liabilities 83 9 2,165 — 2,257 124 9 2,377 — 2,510 Long-term debt, less current portion 5,801 304 2,571 — 8,676 Due to affiliates 7,289 76 — (7,365 ) — Other liabilities 24 — 3,790 — 3,814 Total liabilities 13,238 389 8,738 (7,365 ) 15,000 Equity: Stockholders’ equity 5,345 18,557 18,911 (37,468 ) 5,345 Noncontrolling interests — — 22 — 22 5,345 18,557 18,933 (37,468 ) 5,367 Total liabilities and equity $ 18,583 $ 18,946 $ 27,671 $ (44,833) $ 20,367 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended June 30, 2016 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 3,425 $ — $ 3,425 Costs and expenses — — 2,814 — 2,814 Income from operations — — 611 — 611 Other income (expense): Interest expense, net (76 ) (5 ) (12 ) — (93 ) Loss on early extinguishment of debt — — (3 ) — (3 ) Equity in earnings of subsidiaries, net of taxes 333 336 — (669 ) — Other, net — — (56 ) — (56 ) 257 331 (71 ) (669 ) (152 ) Income (loss) before income taxes 257 331 540 (669 ) 459 Provision for (benefit from) income taxes (30 ) (2 ) 205 — 173 Consolidated net income 287 333 335 (669 ) 286 Less: Net income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Net income attributable to Waste Management, Inc. $ 287 $ 333 $ 336 $ (669 ) $ 287 Three Months Ended June 30, 2015 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 3,315 $ — $ 3,315 Costs and expenses — (6 ) 2,819 — 2,813 Income from operations — 6 496 — 502 Other income (expense): Interest expense, net (75 ) (5 ) (15 ) — (95 ) Loss on early extinguishment of debt (2 ) — — — (2 ) Equity in earnings of subsidiaries, net of taxes 320 317 — (637 ) — Other, net — — (16 ) — (16 ) 243 312 (31 ) (637 ) (113 ) Income (loss) before income taxes 243 318 465 (637 ) 389 Provision for (benefit from) income taxes (31 ) (2 ) 149 — 116 Consolidated net income 274 320 316 (637 ) 273 Less: Net income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Net income attributable to Waste Management, Inc. $ 274 $ 320 $ 317 $ (637 ) $ 274 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Continued) Six Months Ended June 30, 2016 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 6,601 $ — $ 6,601 Costs and expenses — — 5,482 — 5,482 Income from operations — — 1,119 — 1,119 Other income (expense): Interest expense, net (150 ) (10 ) (28 ) — (188 ) Loss on early extinguishment of debt (1 ) — (3 ) — (4 ) Equity in earnings of subsidiaries, net of taxes 637 643 — (1,280 ) — Other, net — — (72 ) — (72 ) 486 633 (103 ) (1,280 ) (264 ) Income (loss) before income taxes 486 633 1,016 (1,280 ) 855 Provision for (benefit from) income taxes (59 ) (4 ) 376 — 313 Consolidated net income 545 637 640 (1,280 ) 542 Less: Net income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Net income attributable to Waste Management, Inc. $ 545 $ 637 $ 643 $ (1,280 ) $ 545 Six Months Ended June 30, 2015 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 6,355 $ — $ 6,355 Costs and expenses — — 5,413 — 5,413 Income from operations — — 942 — 942 Other income (expense): Interest expense, net (154 ) (12 ) (33 ) — (199 ) Loss on early extinguishment of debt (500 ) (52 ) — — (552 ) Equity in earnings of subsidiaries, net of taxes 551 590 — (1,141 ) — Other, net — — (24 ) — (24 ) (103 ) 526 (57 ) (1,141 ) (775 ) Income (loss) before income taxes (103 ) 526 885 (1,141 ) 167 Provision for (benefit from) income taxes (248 ) (25 ) 298 — 25 Consolidated net income 145 551 587 (1,141 ) 142 Less: Net income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Net income attributable to Waste Management, Inc. $ 145 $ 551 $ 590 $ (1,141 ) $ 145 CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Three Months Ended June 30, 2016 Comprehensive income $ 289 $ 333 $ 342 $ (669 ) $ 295 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Comprehensive income attributable to Waste Management, Inc. $ 289 $ 333 $ 343 $ (669 ) $ 296 Three Months Ended June 30, 2015 Comprehensive income $ 276 $ 320 $ 330 $ (637 ) $ 289 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Comprehensive income attributable to Waste Management, Inc. $ 276 $ 320 $ 331 $ (637 ) $ 290 WM WM Non-Guarantor Eliminations Consolidated Six Months Ended June 30, 2016 Comprehensive income $ 549 $ 637 $ 714 $ (1,280 ) $ 620 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Comprehensive income attributable to Waste Management, Inc. $ 549 $ 637 $ 717 $ (1,280 ) $ 623 Six Months Ended June 30, 2015 Comprehensive income $ 151 $ 551 $ 524 $ (1,141 ) $ 85 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Comprehensive income attributable to Waste Management, Inc. $ 151 $ 551 $ 527 $ (1,141 ) $ 88 CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2016 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Cash flows from operating activities: Consolidated net income $ 545 $ 637 $ 640 $ (1,280 ) $ 542 Equity in earnings of subsidiaries, net of taxes (637 ) (643 ) — 1,280 — Other adjustments 6 (1 ) 907 — 912 Net cash provided by (used in) operating activities (86 ) (7 ) 1,547 — 1,454 Cash flows from investing activities: Acquisitions of businesses, net of cash acquired — — (572 ) — (572 ) Capital expenditures — — (629 ) — (629 ) Proceeds from divestitures of businesses and other assets (net of cash divested) — — 24 — 24 Net receipts from restricted trust and escrow accounts and other, net — — (9 ) — (9 ) Net cash used in investing activities — — (1,186 ) — (1,186 ) Cash flows from financing activities: New borrowings 1,647 — 447 — 2,094 Debt repayments (1,038 ) — (479 ) — (1,517 ) Premiums paid on early extinguishment of debt (1 ) — (1 ) — (2 ) Common stock repurchases (500 ) — — — (500 ) Cash dividends (364 ) — — — (364 ) Exercise of common stock options 44 — — — 44 Other, net 15 — (39 ) — (24 ) (Increase) decrease in intercompany and investments, net 283 7 (290 ) — — Net cash provided by (used in) financing activities 86 7 (362 ) — (269 ) Effect of exchange rate changes on cash and cash equivalents — — 1 — 1 Increase (decrease) in cash and cash equivalents — — — — — Cash and cash equivalents at beginning of period — — 39 — 39 Cash and cash equivalents at end of period $ — $ — $ 39 $ — $ 39 CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (Continued) Six Months Ended June 30, 2015 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Cash flows from operating activities: Consolidated net income $ 145 $ 551 $ 587 $ (1,141 ) $ 142 Equity in earnings of subsidiaries, net of taxes (551 ) (590 ) — 1,141 — Other adjustments 5 (5 ) 1,173 — 1,173 Net cash provided by (used in) operating activities (401 ) (44 ) 1,760 — 1,315 Cash flows from investing activities: Acquisitions of businesses, net of cash acquired — — (454 ) — (454 ) Capital expenditures — — (529 ) — (529 ) Proceeds from divestitures of businesses and other assets (net of cash divested) — — 78 — 78 Net receipts from restricted trust and escrow accounts and other, net — — 26 — 26 Net cash used in investing activities — — (879 ) — (879 ) Cash flows from financing activities: New borrowings 1,781 — 85 — 1,866 Debt repayments (1,825 ) (144 ) (212 ) — (2,181 ) Premiums paid on early extinguishment of debt (503 ) (52 ) — — (555 ) Common stock repurchases (300 ) — — — (300 ) Cash dividends (351 ) — — — (351 ) Exercise of common stock options 47 — — — 47 Other, net 5 — — — 5 (Increase) decrease in intercompany and investments, net 460 240 (700 ) — — Net cash provided by (used in) financing activities (686 ) 44 (827 ) — (1,469 ) Effect of exchange rate changes on cash and cash equivalents — — (1 ) — (1 ) Increase (decrease) in cash and cash equivalents (1,087 ) — 53 — (1,034 ) Cash and cash equivalents at beginning of period 1,235 — 72 — 1,307 Cash and cash equivalents at end of period $ 148 $ — $ 125 $ — $ 273

New Accounting Standards Pendin

New Accounting Standards Pending Adoption	6 Months Ended
	Jun. 30, 2016
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards Pending Adoption	16. New Accounting Standards Pending Adoption Financial Instrument Credit Losses — Stock Compensation — Leases Financial Instruments Revenue Recognition

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	The financial statements presented in this report represent the consolidation of Waste Management, Inc., a Delaware corporation, and Waste Management’s wholly-owned and majority-owned subsidiaries. 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. and its consolidated subsidiaries. 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 landfill gas-to-energy facilities in the United States. We evaluate, oversee and manage the financial performance of our Solid Waste business subsidiaries through our 17 geographic Areas. We also provide additional services that are not managed through our Solid Waste business, which are presented in this report as “Other.” Additional information related to our segments is included in Note 8. The Condensed Consolidated Financial Statements as of June 30, 2016 and for the three and six months ended June 30, 2016 and 2015 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, 2015. 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 precision from available data or simply cannot be calculated. In some cases, these estimates are 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 Standards	Adoption of New Accounting Standards Debt Issuance Costs Consolidation
Reclassifications	Reclassifications When necessary, reclassifications have been made to our prior period consolidated financial information in order to conform to the current year presentation.

Landfill and Environmental Re25

Landfill and Environmental Remediation Liabilities (Tables)	6 Months Ended
	Jun. 30, 2016
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, 2016 December 31, 2015 Landfill Environmental Remediation Total Landfill Environmental Remediation Total Current (in accrued liabilities) $ 116 $ 31 $ 147 $ 112 $ 31 $ 143 Long-term 1,440 182 1,622 1,406 178 1,584 $ 1,556 $ 213 $ 1,769 $ 1,518 $ 209 $ 1,727
Changes to Landfill and Environmental Remediation Liabilities	The changes to landfill and environmental remediation liabilities for the six months ended June 30, 2016 are reflected in the table below (in millions): Landfill Environmental Remediation December 31, 2015 $ 1,518 $ 209 Obligations incurred and capitalized 29 — Obligations settled (40 ) (10 ) Interest accretion 44 2 Revisions in estimates and interest rate assumptions(a) 1 12 Acquisitions, divestitures and other adjustments 4 — June 30, 2016 $ 1,556 $ 213 (a) The amount reported in 2016 for our environmental remediation liabilities includes the impact of a decrease in the risk-free discount rate used to measure our liabilities from 2.25% at December 31, 2015 to 1.50% at June 30, 2016, resulting in an increase of $9 million to our environmental remediation liabilities and a corresponding increase to “Operating” expenses.

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2016
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, 2016: June 30, 2016 December 31, 2015 $2.25 billion revolving credit facility, maturing July 2020 $ — $ 20 Letter of credit facilities, maturing through December 2018 — — Canadian credit facility and term loan, maturing March 2019 (weighted average effective interest rate of 2.0% at June 30, 2016 and 2.2% at December 31, 2015) 313 84 Senior notes maturing through 2045, interest rates ranging from 2.4% to 7.75% (weighted average interest rate of 4.5% at June 30, 2016 and 4.7% at December 31, 2015) 6,534 6,050 Tax-exempt bonds, maturing through 2045, fixed and variable interest rates ranging from 0.45% to 5.7% (weighted average interest rate of 1.7% at June 30, 2016 and 1.9% at December 31, 2015) 2,350 2,447 Capital leases and other, maturing through 2055, interest rates up to 12% 333 328 9,530 8,929 Current portion of long-term debt 614 253 $ 8,916 $ 8,676

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2016
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, 2016 2015 2016 2015 Number of common shares outstanding at end of period 441.7 451.8 441.7 451.8 Effect of using weighted average common shares outstanding 2.3 3.7 3.3 5.2 Weighted average basic common shares outstanding 444.0 455.5 445.0 457.0 Dilutive effect of equity-based compensation awards and other contingently issuable shares 2.7 2.5 2.5 2.6 Weighted average diluted common shares outstanding 446.7 458.0 447.5 459.6 Potentially issuable shares 10.1 11.2 10.1 11.2 Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 0.5 2.3 0.8 2.3

Segment and Related Informati28

Segment and Related Information (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Reportable Segments	Summarized financial information concerning our reportable segments 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, 2016 Solid Waste: Tier 1 $ 1,316 $ (229 ) $ 1,087 $ 362 Tier 2 856 (158 ) 698 157 Tier 3 1,347 (233 ) 1,114 235 Solid Waste 3,519 (620 ) 2,899 754 Other 572 (46 ) 526 (20 ) 4,091 (666 ) 3,425 734 Corporate and Other — — — (123 ) Total $ 4,091 $ (666 ) $ 3,425 $ 611 June 30, 2015 Solid Waste: Tier 1 $ 1,292 $ (218 ) $ 1,074 $ 297 Tier 2 853 (162 ) 691 151 Tier 3 1,264 (215 ) 1,049 182 Solid Waste 3,409 (595 ) 2,814 630 Wheelabrator — — — 8 Other 525 (24 ) 501 (17 ) 3,934 (619 ) 3,315 621 Corporate and Other — — — (119 ) Total $ 3,934 $ (619 ) $ 3,315 $ 502 Gross Operating Revenues Intercompany Operating Revenues Net Operating Revenues Income from Operations Six Months Ended: June 30, 2016 Solid Waste: Tier 1 $ 2,557 $ (441 ) $ 2,116 $ 696 Tier 2 1,637 (300 ) 1,337 302 Tier 3 2,607 (445 ) 2,162 443 Solid Waste 6,801 (1,186 ) 5,615 1,441 Other 1,072 (86 ) 986 (56 ) 7,873 (1,272 ) 6,601 1,385 Corporate and Other — — — (266 ) Total $ 7,873 $ (1,272 ) $ 6,601 $ 1,119 June 30, 2015 Solid Waste: Tier 1 $ 2,487 $ (408 ) $ 2,079 $ 593 Tier 2 1,633 (305 ) 1,328 290 Tier 3 2,386 (395 ) 1,991 360 Solid Waste 6,506 (1,108 ) 5,398 1,243 Wheelabrator — — — 1 Other 1,003 (46 ) 957 (40 ) 7,509 (1,154 ) 6,355 1,204 Corporate and Other — — — (262 ) Total $ 7,509 $ (1,154 ) $ 6,355 $ 942

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Schedule of Preliminary Allocation of Purchase Price	The following table presents the preliminary allocation of the purchase price for SWS to other intangible assets (amounts in millions, except for amortization periods): Amount Weighted Average Amortization Periods (in Years) Customer relationships $ 160 10.0 Noncompete agreements 18 5.0 Trade name 4 10.0 Total other intangible assets subject to amortization $ 182 9.5
Pro Forma Consolidated Results of Operations	The following pro forma consolidated results of operations have been prepared as if the acquisitions of Deffenbaugh and SWS occurred at January 1, 2015 (in millions, except per share amounts): Three Months Ended Six Months Ended June 30, 2015 2016 2015 Operating revenues $ 3,350 $ 6,603 $ 6,461 Net income attributable to Waste Management, Inc. 274 545 144 Basic earnings per common share 0.60 1.23 0.31 Diluted earnings per common share 0.60 1.22 0.31

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, which is included as a component of Waste Management, Inc. stockholders’ equity, are as follows (in millions, with amounts in parentheses representing decreases to accumulated other comprehensive income): Derivative Instruments Available- for-Sale Securities Foreign Currency Translation Adjustments Post- Retirement Benefit Plans Total Balance, December 31, 2015 $ (52 ) $ 8 $ (75 ) $ (8 ) $ (127 ) Other comprehensive income (loss) before reclassifications net of tax expense (benefit) of $(4), $1, $0 and $0, respectively (7 ) 2 67 — 62 Amounts reclassified from accumulated other comprehensive (income) loss net of tax (expense) benefit of $10, $0, $0 and $0, respectively 16 — — — 16 Net current period other comprehensive income (loss) 9 2 67 — 78 Balance, June 30, 2016 $ (43 ) $ 10 $ (8 ) $ (8 ) $ (49 )
Other Comprehensive Income (Loss) Before Reclassifications Associated with the Effective Portion of Derivatives Designated as Cash Flow Hedges	The amounts of other comprehensive income (loss) before reclassifications associated with the effective portion of derivatives designated as cash flow hedges are as follows (in millions): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Foreign currency derivatives $ — $ (3 ) $ (11 ) $ 21 Tax (expense) benefit — 1 4 (8 ) Net of tax $ — $ (2 ) $ (7 ) $ 13
Reclassification of Component of Accumulated Other Comprehensive Income (Loss)	The significant amounts reclassified out of each component of accumulated other comprehensive income (loss) are as follows (in millions, with amounts in parentheses representing debits to the statement of operations classification): Three Months Ended Six Months Ended Statement of Operations Classification 2016 2015 2016 2015 Gains and losses on cash flow hedges: Forward-starting interest rate swaps $ (3 ) $ (2 ) $ (6 ) $ (5 ) Interest expense, net Treasury rate locks — — — (3 ) Interest expense, net Foreign currency derivatives — (5 ) (20 ) 21 Other, net (3 ) (7 ) (26 ) 13 Total before tax 1 3 10 (5 ) Tax (expense) benefit Total reclassifications for the period $ (2 ) $ (4 ) $ (16 ) $ 8 Net of tax

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2016
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, 2016 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 $ 40 $ 40 $ — $ — Available-for-sale securities 45 — 45 — Fixed-income securities 36 — 36 — Redeemable preferred stock 48 — — 48 Total assets $ 169 $ 40 $ 81 $ 48 Fair Value Measurements at December 31, 2015 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 $ 35 $ 35 $ — $ — Available-for-sale securities 43 — 43 — Fixed-income securities 40 — 40 — Foreign currency derivatives(b) 78 — 78 — Redeemable preferred stock 47 — — 47 Total assets $ 243 $ 35 $ 161 $ 47 (a) When available, 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. 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 analysis, third-party appraisals or industry multiples and public comparables. There has not been any significant change in the fair value of the redeemable preferred stock since our assessment at December 31, 2015. (b) In March 2016, we terminated our foreign currency derivatives. Refer to Note 4 for additional information.

Condensed Consolidating Finan32

Condensed Consolidating Financial Statements (Tables)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Balance Sheets	CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2016 (Unaudited) WM WM Holdings Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ — $ — $ 39 $ — $ 39 Other current assets 6 7 2,224 — 2,237 6 7 2,263 — 2,276 Property and equipment, net — — 10,841 — 10,841 Investments in and advances to affiliates(a) 19,194 19,628 7,490 (46,312 ) — Other assets 15 30 7,590 — 7,635 Total assets $ 19,215 $ 19,665 $ 28,184 $ (46,312 ) $ 20,752 LIABILITIES AND EQUITY Current liabilities: Current portion of long-term debt $ 500 $ — $ 114 $ — $ 614 Accounts payable and other current liabilities 84 11 2,097 — 2,192 584 11 2,211 — 2,806 Long-term debt, less current portion(a) 6,073 304 2,539 — 8,916 Due to affiliates(a) 7,334 156 — (7,490 ) — Other liabilities 16 — 3,786 — 3,802 Total liabilities 14,007 471 8,536 (7,490 ) 15,524 Equity: Stockholders’ equity 5,208 19,194 19,628 (38,822 ) 5,208 Noncontrolling interests — — 20 — 20 5,208 19,194 19,648 (38,822 ) 5,228 Total liabilities and equity $ 19,215 $ 19,665 $ 28,184 $ (46,312 ) $ 20,752 (a) In conjunction with the preparation of our June 30, 2016 Condensed Consolidating Balance Sheet, we identified and corrected the presentation of $126 million of tax-exempt bonds previously reported in Non-Guarantor Subsidiaries’ rather than WM’s “Long-term debt, less current portion,” which had corresponding impacts on “Investments in and advances to affiliates” and “Due to affiliates.” This immaterial correction has been reflected in our June 30, 2016 Condensed Consolidating Financial Statements. CONDENSED CONSOLIDATING BALANCE SHEETS (Continued) December 31, 2015 WM WM Holdings Non-Guarantor Subsidiaries Eliminations Consolidated ASSETS Current assets: Cash and cash equivalents $ — $ — $ 39 $ — $ 39 Other current assets 3 6 2,297 — 2,306 3 6 2,336 — 2,345 Property and equipment, net — — 10,665 — 10,665 Investments in and advances to affiliates 18,557 18,911 7,365 (44,833 ) — Other assets 23 29 7,305 — 7,357 Total assets $ 18,583 $ 18,946 $ 27,671 $ (44,833 ) $ 20,367 LIABILITIES AND EQUITY Current liabilities: Current portion of long-term debt $ 41 $ — $ 212 $ — $ 253 Accounts payable and other current liabilities 83 9 2,165 — 2,257 124 9 2,377 — 2,510 Long-term debt, less current portion 5,801 304 2,571 — 8,676 Due to affiliates 7,289 76 — (7,365 ) — Other liabilities 24 — 3,790 — 3,814 Total liabilities 13,238 389 8,738 (7,365 ) 15,000 Equity: Stockholders’ equity 5,345 18,557 18,911 (37,468 ) 5,345 Noncontrolling interests — — 22 — 22 5,345 18,557 18,933 (37,468 ) 5,367 Total liabilities and equity $ 18,583 $ 18,946 $ 27,671 $ (44,833) $ 20,367
Condensed Consolidating Statements of Operations	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended June 30, 2016 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 3,425 $ — $ 3,425 Costs and expenses — — 2,814 — 2,814 Income from operations — — 611 — 611 Other income (expense): Interest expense, net (76 ) (5 ) (12 ) — (93 ) Loss on early extinguishment of debt — — (3 ) — (3 ) Equity in earnings of subsidiaries, net of taxes 333 336 — (669 ) — Other, net — — (56 ) — (56 ) 257 331 (71 ) (669 ) (152 ) Income (loss) before income taxes 257 331 540 (669 ) 459 Provision for (benefit from) income taxes (30 ) (2 ) 205 — 173 Consolidated net income 287 333 335 (669 ) 286 Less: Net income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Net income attributable to Waste Management, Inc. $ 287 $ 333 $ 336 $ (669 ) $ 287 Three Months Ended June 30, 2015 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 3,315 $ — $ 3,315 Costs and expenses — (6 ) 2,819 — 2,813 Income from operations — 6 496 — 502 Other income (expense): Interest expense, net (75 ) (5 ) (15 ) — (95 ) Loss on early extinguishment of debt (2 ) — — — (2 ) Equity in earnings of subsidiaries, net of taxes 320 317 — (637 ) — Other, net — — (16 ) — (16 ) 243 312 (31 ) (637 ) (113 ) Income (loss) before income taxes 243 318 465 (637 ) 389 Provision for (benefit from) income taxes (31 ) (2 ) 149 — 116 Consolidated net income 274 320 316 (637 ) 273 Less: Net income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Net income attributable to Waste Management, Inc. $ 274 $ 320 $ 317 $ (637 ) $ 274 CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Continued) Six Months Ended June 30, 2016 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 6,601 $ — $ 6,601 Costs and expenses — — 5,482 — 5,482 Income from operations — — 1,119 — 1,119 Other income (expense): Interest expense, net (150 ) (10 ) (28 ) — (188 ) Loss on early extinguishment of debt (1 ) — (3 ) — (4 ) Equity in earnings of subsidiaries, net of taxes 637 643 — (1,280 ) — Other, net — — (72 ) — (72 ) 486 633 (103 ) (1,280 ) (264 ) Income (loss) before income taxes 486 633 1,016 (1,280 ) 855 Provision for (benefit from) income taxes (59 ) (4 ) 376 — 313 Consolidated net income 545 637 640 (1,280 ) 542 Less: Net income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Net income attributable to Waste Management, Inc. $ 545 $ 637 $ 643 $ (1,280 ) $ 545 Six Months Ended June 30, 2015 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Operating revenues $ — $ — $ 6,355 $ — $ 6,355 Costs and expenses — — 5,413 — 5,413 Income from operations — — 942 — 942 Other income (expense): Interest expense, net (154 ) (12 ) (33 ) — (199 ) Loss on early extinguishment of debt (500 ) (52 ) — — (552 ) Equity in earnings of subsidiaries, net of taxes 551 590 — (1,141 ) — Other, net — — (24 ) — (24 ) (103 ) 526 (57 ) (1,141 ) (775 ) Income (loss) before income taxes (103 ) 526 885 (1,141 ) 167 Provision for (benefit from) income taxes (248 ) (25 ) 298 — 25 Consolidated net income 145 551 587 (1,141 ) 142 Less: Net income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Net income attributable to Waste Management, Inc. $ 145 $ 551 $ 590 $ (1,141 ) $ 145
Condensed Consolidating Statements of Comprehensive Income	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Three Months Ended June 30, 2016 Comprehensive income $ 289 $ 333 $ 342 $ (669 ) $ 295 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Comprehensive income attributable to Waste Management, Inc. $ 289 $ 333 $ 343 $ (669 ) $ 296 Three Months Ended June 30, 2015 Comprehensive income $ 276 $ 320 $ 330 $ (637 ) $ 289 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (1 ) — (1 ) Comprehensive income attributable to Waste Management, Inc. $ 276 $ 320 $ 331 $ (637 ) $ 290 WM WM Non-Guarantor Eliminations Consolidated Six Months Ended June 30, 2016 Comprehensive income $ 549 $ 637 $ 714 $ (1,280 ) $ 620 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Comprehensive income attributable to Waste Management, Inc. $ 549 $ 637 $ 717 $ (1,280 ) $ 623 Six Months Ended June 30, 2015 Comprehensive income $ 151 $ 551 $ 524 $ (1,141 ) $ 85 Less: Comprehensive income (loss) attributable to noncontrolling interests — — (3 ) — (3 ) Comprehensive income attributable to Waste Management, Inc. $ 151 $ 551 $ 527 $ (1,141 ) $ 88
Condensed Consolidating Statements of Cash Flows	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2016 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Cash flows from operating activities: Consolidated net income $ 545 $ 637 $ 640 $ (1,280 ) $ 542 Equity in earnings of subsidiaries, net of taxes (637 ) (643 ) — 1,280 — Other adjustments 6 (1 ) 907 — 912 Net cash provided by (used in) operating activities (86 ) (7 ) 1,547 — 1,454 Cash flows from investing activities: Acquisitions of businesses, net of cash acquired — — (572 ) — (572 ) Capital expenditures — — (629 ) — (629 ) Proceeds from divestitures of businesses and other assets (net of cash divested) — — 24 — 24 Net receipts from restricted trust and escrow accounts and other, net — — (9 ) — (9 ) Net cash used in investing activities — — (1,186 ) — (1,186 ) Cash flows from financing activities: New borrowings 1,647 — 447 — 2,094 Debt repayments (1,038 ) — (479 ) — (1,517 ) Premiums paid on early extinguishment of debt (1 ) — (1 ) — (2 ) Common stock repurchases (500 ) — — — (500 ) Cash dividends (364 ) — — — (364 ) Exercise of common stock options 44 — — — 44 Other, net 15 — (39 ) — (24 ) (Increase) decrease in intercompany and investments, net 283 7 (290 ) — — Net cash provided by (used in) financing activities 86 7 (362 ) — (269 ) Effect of exchange rate changes on cash and cash equivalents — — 1 — 1 Increase (decrease) in cash and cash equivalents — — — — — Cash and cash equivalents at beginning of period — — 39 — 39 Cash and cash equivalents at end of period $ — $ — $ 39 $ — $ 39 CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (Continued) Six Months Ended June 30, 2015 (Unaudited) WM WM Non-Guarantor Eliminations Consolidated Cash flows from operating activities: Consolidated net income $ 145 $ 551 $ 587 $ (1,141 ) $ 142 Equity in earnings of subsidiaries, net of taxes (551 ) (590 ) — 1,141 — Other adjustments 5 (5 ) 1,173 — 1,173 Net cash provided by (used in) operating activities (401 ) (44 ) 1,760 — 1,315 Cash flows from investing activities: Acquisitions of businesses, net of cash acquired — — (454 ) — (454 ) Capital expenditures — — (529 ) — (529 ) Proceeds from divestitures of businesses and other assets (net of cash divested) — — 78 — 78 Net receipts from restricted trust and escrow accounts and other, net — — 26 — 26 Net cash used in investing activities — — (879 ) — (879 ) Cash flows from financing activities: New borrowings 1,781 — 85 — 1,866 Debt repayments (1,825 ) (144 ) (212 ) — (2,181 ) Premiums paid on early extinguishment of debt (503 ) (52 ) — — (555 ) Common stock repurchases (300 ) — — — (300 ) Cash dividends (351 ) — — — (351 ) Exercise of common stock options 47 — — — 47 Other, net 5 — — — 5 (Increase) decrease in intercompany and investments, net 460 240 (700 ) — — Net cash provided by (used in) financing activities (686 ) 44 (827 ) — (1,469 ) Effect of exchange rate changes on cash and cash equivalents — — (1 ) — (1 ) Increase (decrease) in cash and cash equivalents (1,087 ) — 53 — (1,034 ) Cash and cash equivalents at beginning of period 1,235 — 72 — 1,307 Cash and cash equivalents at end of period $ 148 $ — $ 125 $ — $ 273

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016Areas	Dec. 31, 2015USD ($)
Basis Of Presentation [Line Items]
Number of geographical areas | Areas	17
Accounting Standards Update 2015-03 [Member]
Basis Of Presentation [Line Items]
Reclassification of debt issuance costs | $		$ 52

Landfill and Environmental Re34

Landfill and Environmental Remediation Liabilities - Liabilities for Landfill and Environmental Remediation Costs (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Site Contingency [Line Items]
Total, Environmental Remediation	$ 213
Current (in accrued liabilities)	147	$ 143
Long-term	1,622	1,584
Total	1,769	1,727
Landfill [Member]
Site Contingency [Line Items]
Current (in accrued liabilities), Landfill	116	112
Long-term, Landfill	1,440	1,406
Total, Landfill	1,556	1,518
Environmental Remediation Liabilities [Member]
Site Contingency [Line Items]
Current (in accrued liabilities), Environmental Remediation	31	31
Long-term, Environmental Remediation	182	178
Total, Environmental Remediation	$ 213	$ 209

Landfill and Environmental Re35

Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Environmental Exit Cost [Line Items]
Interest accretion	$ 44	$ 43
Ending balance, environmental remediation	213
Landfill [Member]
Environmental Exit Cost [Line Items]
Beginning balance, landfill	1,518
Obligations incurred and capitalized	29
Obligations settled	(40)
Interest accretion	44
Revisions in estimates and interest rate assumptions	1
Acquisitions, divestitures and other adjustments	4
Ending balance, landfill	1,556
Environmental Remediation Liabilities [Member]
Environmental Exit Cost [Line Items]
Beginning balance, environmental remediation	209
Obligations settled	(10)
Interest accretion	2
Revisions in estimates and interest rate assumptions	12
Acquisitions, divestitures and other adjustments	0
Ending balance, environmental remediation	$ 213

Landfill and Environmental Re36

Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Environmental Remediation Obligations [Abstract]
Risk-free discount rate of the obligations	1.50%	2.25%
Increase (Decrease) to operating expenses due to change in discount rate used to estimate the present value of environmental remediation obligations	$ 9

Debt - Components of Debt (Deta

Debt - Components of Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 9,530	$ 8,929
Current portion of long-term debt	614	253
Long-term debt, less current portion	8,916	8,676
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt and capital lease obligations		20
Letter of Credit Facilities [Member]
Debt Instrument [Line Items]
Debt and capital lease obligations	0	0
Canadian Credit Facility and Term Loan [Member]
Debt Instrument [Line Items]
Debt and capital lease obligations	313	84
Senior Notes [Member]
Debt Instrument [Line Items]
Debt and capital lease obligations	6,534	6,050
Tax-exempt Bonds [Member]
Debt Instrument [Line Items]
Debt and capital lease obligations	2,350	2,447
Capital Leases and Other [Member]
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 333	$ 328

Debt - Components of Debt (Pare

Debt - Components of Debt (Parenthetical) (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Senior Notes [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.50%	4.70%
Interest rate lower range	2.40%
Interest rate upper range	7.75%
End period of maturity for debt instrument	Mar. 1, 2045
Tax-exempt Bonds [Member]
Debt Instrument [Line Items]
Weighted average interest rate	1.70%	1.90%
Interest rate lower range	0.45%
Interest rate upper range	5.70%
End period of maturity for debt instrument	Aug. 1, 2045
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]
Credit Facility, aggregate capacity	$ 2,250,000,000
Maturity date of credit facility	Jul. 30, 2020
Canadian Credit Facility and Term Loan [Member]
Debt Instrument [Line Items]
Weighted average interest rate	2.00%	2.20%
Maturity date of credit facility	Mar. 31, 2019
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Maturity date of credit facility	Dec. 31, 2018

Debt - Additional Information (

Debt - Additional Information (Detail)	1 Months Ended		3 Months Ended					6 Months Ended
	May 31, 2016USD ($)	Mar. 31, 2016CAD	Jun. 30, 2016USD ($)	Jun. 30, 2016CAD	Mar. 31, 2016USD ($)	Mar. 31, 2016CAD	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)
Debt Instrument [Line Items]
Debt maturing within twelve months, excluding 2.6% senior notes due September 2016			$ 114,000,000					$ 114,000,000
Tax-exempt bonds subject to re-pricing within next 12 months			454,000,000					454,000,000
Letters of credit outstanding under credit facility			964,000,000					964,000,000
Loss on early extinguishment of debt			(3,000,000)				$ (2,000,000)	(4,000,000)	$ (552,000,000)
Tax-exempt Bonds [Member]
Debt Instrument [Line Items]
Debt maturing within twelve months, excluding 2.6% senior notes due September 2016			48,000,000					48,000,000
Repayment of tax exempt bonds	$ 143,000,000
Proceeds from tax-exempt bonds	$ 143,000,000
Loss on early extinguishment of debt			(3,000,000)					(3,000,000)
Tax-exempt Bonds [Member] | Variable Rate [Member]
Debt Instrument [Line Items]
Variable-rate tax-exempt bonds			491,000,000					491,000,000
2.4% Senior Notes Due May 2023 [Member]
Debt Instrument [Line Items]
Interest rate	2.40%
Debt instrument face amount	$ 500,000,000
Net proceeds from issuance of senior notes	$ 496,000,000
2.6% Senior Notes Mature in September 2016 [Member]
Debt Instrument [Line Items]
Senior note amount			$ 500,000,000					$ 500,000,000
Interest rate			2.60%					2.60%
Maturity period								2016-09
Senior Notes [Member]
Debt Instrument [Line Items]
Loss on early extinguishment of debt									(552,000,000)
Early extinguishment of high-coupon senior notes									$ 2,000,000,000
Canadian Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility, aggregate capacity | CAD		CAD 50,000,000				CAD 50,000,000
Maturity date of credit facility		Mar. 31, 2019
2016 Canadian Credit Agreement [Member] | Intercompany Debt [Member]
Debt Instrument [Line Items]
Repayment of debt		CAD 370,000,000			$ 280,000,000	370,000,000
Cash [Member] | Tax-exempt Bonds [Member]
Debt Instrument [Line Items]
Repayment of tax exempt bonds								$ 98,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility, aggregate capacity			$ 2,250,000,000					2,250,000,000
Letters of credit outstanding under credit facility			814,000,000					$ 814,000,000
Maturity date of credit facility								Jul. 30, 2020
Outstanding borrowings under credit facility			0					$ 0
Credit Facility, remaining capacity			1,436,000,000					1,436,000,000
Letter of Credit Facilities [Member]
Debt Instrument [Line Items]
Credit Facility, aggregate capacity			2,400,000,000					$ 2,400,000,000
Maturity date of credit facility								Dec. 31, 2018
Non Revolving Term Credit Facility [Member]
Debt Instrument [Line Items]
Credit Facility, aggregate capacity | CAD		460,000,000				460,000,000
Canadian Term Loan [Member]
Debt Instrument [Line Items]
Credit Facility, aggregate capacity | CAD		500,000,000				500,000,000
Credit Facility, remaining capacity | CAD		CAD 90,000,000				90,000,000
Net borrowings (repayments)			$ (42,000,000)	CAD (55,000,000)	(20,000,000)	(27,000,000)
Canadian Term Loan [Member] | 2016 Canadian Credit Agreement [Member]
Debt Instrument [Line Items]
Net borrowings (repayments)					$ 347,000,000	CAD 460,000,000

Derivative Instruments and He40

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Millions	1 Months Ended	6 Months Ended
	Mar. 31, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2015CAD
Currency Swaps [Member] | Principal [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivatives for intercompany debt | CAD				CAD 370,000,000
Foreign Currency Derivatives [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash received in termination of foreign exchange cross currency swaps	$ 67
Expense associated with termination of foreign exchange cross currency swaps	$ 8
Foreign Currency Derivatives [Member] | Cash Flow Hedging [Member] | Long-term other assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency derivatives, Assets			$ 63
Foreign Currency Derivatives [Member] | Cash Flow Hedging [Member] | Current Other Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency derivatives, Assets			15
Forward Starting Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Deferred losses, net of taxes, related to cash flow hedges included in accumulated other comprehensive income (loss)		$ 39	$ 43
Term of senior notes to amortize deferred losses		10 years
Treasury Rate Locks [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Deferred losses scheduled to be reclassified out of accumulated other comprehensive into interest expense over next 12 months, pre-tax		$ 10

Income Taxes - Additional infor

Income Taxes - Additional information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Taxes [Line Items]
Effective tax rate of income (loss) before income taxes	37.60%	29.60%	36.50%	14.50%
Equity in net losses of unconsolidated entities	$ 16	$ 15	$ 23	$ 23
Interest expense	93	95	188	199
Investments Qualifying for Federal Tax Credits [Member]
Income Taxes [Line Items]
Equity in net losses of unconsolidated entities	9	7	15	14
Interest expense	1	1	2	2
Income tax benefit, including tax credits, from equity method investment	$ 14	$ 13	$ 25	$ 24

Earnings Per Share - Common Sha

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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Number of common shares outstanding at end of period	441.7	451.8	441.7	451.8
Effect of using weighted average common shares outstanding	2.3	3.7	3.3	5.2
Weighted average basic common shares outstanding	444	455.5	445	457
Dilutive effect of equity-based compensation awards and other contingently issuable shares	2.7	2.5	2.5	2.6
Weighted average diluted common shares outstanding	446.7	458	447.5	459.6
Potentially issuable shares	10.1	11.2	10.1	11.2
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding	0.5	2.3	0.8	2.3

Commitments and Contingencies -

Commitments and Contingencies - Additional information (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)siteLandfillProperty	Dec. 31, 2015USD ($)
Commitments And Contingencies [Line Items]
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | Landfill		21
Approximate number of homeowners' properties adjacent to or near certain of our landfills with agreements guaranteeing market value | Property		850
Environmental remediation reasonably possible additional losses high estimate		$ 195,000,000
Environmental remediation liabilities		$ 213,000,000
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP | site		75
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		60
Approximate percentage of workforce covered by collective bargaining agreements		20.00%
Withdrawal from Multiemployer Pension Plans [Member]
Commitments And Contingencies [Line Items]
Charge to "Operating" expenses	$ 55,000,000
2014 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits		3 months
2015 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits		12 months
2016 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits		24 months
Wheelabrator [Member]
Commitments And Contingencies [Line Items]
Maximum future payments regarding guarantees of unconsolidated entities financial obligations		$ 106,000,000	$ 106,000,000
Financial and performance obligations, net liability		$ 12,000,000	$ 13,000,000
Term of financial and performance obligation		2,038
Maximum [Member]
Commitments And Contingencies [Line Items]
Dollar threshold for environmental matters requiring disclosure under item 103 of the SEC's Regulation S-K		$ 100,000
Domestic Line of Credit [Member]
Commitments And Contingencies [Line Items]
Credit Facility, aggregate capacity		$ 2,250,000,000

Segment and Related Informati44

Segment and Related Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016Areas
Segment Reporting Information [Line Items]
Number of geographical areas	17
Solid Waste [Member]
Segment Reporting Information [Line Items]
Number of geographical areas	17

Segment and Related Informati45

Segment and Related Information - Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Operating revenues	$ 3,425	$ 3,315	$ 6,601	$ 6,355
Income from operations	611	502	1,119	942
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,091	3,934	7,873	7,509
Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(666)	(619)	(1,272)	(1,154)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	(123)	(119)	(266)	(262)
Solid Waste: Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,087	1,074	2,116	2,079
Income from operations	362	297	696	593
Solid Waste: Tier 1 [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,316	1,292	2,557	2,487
Solid Waste: Tier 1 [Member] | Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(229)	(218)	(441)	(408)
Solid Waste: Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	698	691	1,337	1,328
Income from operations	157	151	302	290
Solid Waste: Tier 2 [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	856	853	1,637	1,633
Solid Waste: Tier 2 [Member] | Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(158)	(162)	(300)	(305)
Solid Waste: Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,114	1,049	2,162	1,991
Income from operations	235	182	443	360
Solid Waste: Tier 3 [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,347	1,264	2,607	2,386
Solid Waste: Tier 3 [Member] | Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(233)	(215)	(445)	(395)
Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	2,899	2,814	5,615	5,398
Income from operations	754	630	1,441	1,243
Solid Waste [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,519	3,409	6,801	6,506
Solid Waste [Member] | Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(620)	(595)	(1,186)	(1,108)
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	526	501	986	957
Income from operations	(20)	(17)	(56)	(40)
Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	572	525	1,072	1,003
Other [Member] | Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(46)	(24)	(86)	(46)
Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,425	3,315	6,601	6,355
Income from operations	734	621	1,385	1,204
Operating Group Total [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,091	3,934	7,873	7,509
Operating Group Total [Member] | Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	$ (666)	(619)	$ (1,272)	(1,154)
Wheelabrator [Member]
Segment Reporting Information [Line Items]
Income from operations		$ 8		$ 1

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($)	Jan. 08, 2016	Mar. 26, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Allocation of purchase price to goodwill			$ 6,230,000,000		$ 6,230,000,000		$ 5,984,000,000
Total operating revenues			3,425,000,000	$ 3,315,000,000	6,601,000,000	$ 6,355,000,000
Consolidated net income			286,000,000	$ 273,000,000	542,000,000	$ 142,000,000
Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Credit Facility, aggregate capacity			2,250,000,000		2,250,000,000
Southern Waste Systems [Member]
Business Acquisition [Line Items]
Total consideration, net of cash acquired, for business acquisitions closed during the year	$ 525,000,000
Allocation of purchase price to property and equipment	93,000,000
Allocation of purchase price to other intangible assets	182,000,000
Allocation of purchase price to goodwill	$ 250,000,000
Total operating revenues			39,000,000		76,000,000
Consolidated net income					$ 1,000,000
Southern Waste Systems [Member] | Maximum [Member]
Business Acquisition [Line Items]
Consolidated net income			$ 1,000,000
Deffenbaugh Disposal, Inc. [Member]
Business Acquisition [Line Items]
Total consideration, net of cash acquired, for business acquisitions closed during the year		$ 400,000,000

Acquisitions - Schedule of Prel

Acquisitions - Schedule of Preliminary Allocation of Purchase Price (Detail) - Southern Waste Systems [Member] $ in Millions	Jan. 08, 2016USD ($)
Finite-Lived Intangible Assets [Line Items]
Total other intangible assets subject to amortization, Amount	$ 182
Total other intangible assets subject to amortization, Weighted Average Amortization Periods	9 years 6 months
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Total other intangible assets subject to amortization, Amount	$ 160
Total other intangible assets subject to amortization, Weighted Average Amortization Periods	10 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Total other intangible assets subject to amortization, Amount	$ 18
Total other intangible assets subject to amortization, Weighted Average Amortization Periods	5 years
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Total other intangible assets subject to amortization, Amount	$ 4
Total other intangible assets subject to amortization, Weighted Average Amortization Periods	10 years

Acquisitions - ProForma Consoli

Acquisitions - ProForma Consolidated Results of Operations (Detail) - Deffenbaugh Disposal Inc And Southern Waste Systems [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Operating revenues	$ 3,350	$ 6,603	$ 6,461
Net income attributable to Waste Management, Inc.	$ 274	$ 545	$ 144
Basic earnings per common share	$ 0.60	$ 1.23	$ 0.31
Diluted earnings per common share	$ 0.60	$ 1.22	$ 0.31

Asset Impairments and Unusual49

Asset Impairments and Unusual Items - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Expense from divestitures, asset impairments and unusual items	$ 2	$ 2	$ 1	$ 15
Oil and Gas Well [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
(Income) expense from divestitures				(6)
Investment in Waste Diversion Technology Company [Member] | Other, net [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Impairment charges	$ 41
Western Canada Area [Member] | Landfill [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Impairment charges				5
Recycling Operations [Member]
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items]
Impairment charges				$ 16

Accumulated Other Comprehensi50

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			$ (127)
Other comprehensive income (loss) before reclassifications, net of tax			62
Amounts reclassified from accumulated other comprehensive (income) loss net of tax			16
Other comprehensive income (loss), net of taxes	$ 9	$ 16	78	$ (57)
Accumulated Other Comprehensive Income (Loss), Ending balance	(49)		(49)
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			(52)
Other comprehensive income (loss) before reclassifications, net of tax			(7)
Amounts reclassified from accumulated other comprehensive (income) loss net of tax			16
Other comprehensive income (loss), net of taxes			9
Accumulated Other Comprehensive Income (Loss), Ending balance	(43)		(43)
Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			8
Other comprehensive income (loss) before reclassifications, net of tax			2
Other comprehensive income (loss), net of taxes			2
Accumulated Other Comprehensive Income (Loss), Ending balance	10		10
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			(75)
Other comprehensive income (loss) before reclassifications, net of tax			67
Other comprehensive income (loss), net of taxes			67
Accumulated Other Comprehensive Income (Loss), Ending balance	(8)		(8)
Post - Retirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning balance			(8)
Accumulated Other Comprehensive Income (Loss), Ending balance	$ (8)		$ (8)

Accumulated Other Comprehensi51

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), tax	$ (1)	$ (4)	$ 8
Amounts reclassified from accumulated other comprehensive (income) loss, tax		10
Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), tax		1
Amounts reclassified from accumulated other comprehensive (income) loss, tax		0
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), tax		0
Amounts reclassified from accumulated other comprehensive (income) loss, tax		0
Post - Retirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), tax		0
Amounts reclassified from accumulated other comprehensive (income) loss, tax		$ 0

Accumulated Other Comprehensi52

Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Income (Loss) Before Reclassifications Associated With the Effective Portion of Derivatives Designated as Cash Flow Hedges (Detail) - Derivative Instruments [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax (expense) benefit	$ 1	$ 4	$ (8)
Net of tax	(2)	(7)	13
Foreign Currency Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) on derivatives before tax	$ (3)	$ (11)	$ 21

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Income (Loss) - Reclassification of Component of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ (93)	$ (95)	$ (188)	$ (199)
Other, net	(40)	(1)	(49)	(1)
Income (loss) before income taxes	459	389	855	167
Tax (expense) benefit	(173)	(116)	(313)	(25)
Total reclassifications for the period, Net of tax	286	273	542	142
Amount Reclassified from Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before income taxes	(3)	(7)	(26)	13
Tax (expense) benefit	1	3	10	(5)
Total reclassifications for the period, Net of tax	(2)	(4)	(16)	8
Interest Rate Swaps [Member] | Amount Reclassified from Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ (3)	(2)	(6)	(5)
Treasury Rate Locks [Member] | Amount Reclassified from Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net				(3)
Foreign Currency Derivatives [Member] | Amount Reclassified from Accumulated Other Comprehensive Income [Member] | Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other, net		$ (5)	$ (20)	$ 21

Share Repurchases - Additional

Share Repurchases - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended						6 Months Ended
	May 31, 2016	Apr. 30, 2016	Mar. 31, 2016	Feb. 29, 2016	Jan. 31, 2016	Dec. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Accelerated Share Repurchases [Line Items]
Common stock repurchases							$ 500,000,000
Cash paid for repurchase of common stock							500,000,000	$ 300,000,000
Authorization of future share repurchase							$ 650,000,000
Accelerated Share Repurchase Agreement (ASR) [Member]
Accelerated Share Repurchases [Line Items]
Common stock repurchases	$ 250,000,000		$ 100,000,000			$ 150,000,000
Shares of common stock received under ASR	3.3	0.5	1.2	0.9	2
Cash paid for repurchase of common stock	$ 250,000,000		$ 100,000,000		$ 150,000,000
Accelerated share repurchase, price per share	$ 60.49		$ 56.95		$ 53.37
Accelerated Share Repurchase Agreement (ASR) [Member] | Weighted Average [Member]
Accelerated Share Repurchases [Line Items]
Final weighted average per share purchase price during the repurchase period		$ 58.33		$ 53.15

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	$ 169	$ 243
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	40	35
Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	45	43
Fixed-Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	36	40
Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	48	47
Foreign Currency Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivatives		78
Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	40	35
Quoted Prices in Active Markets (Level 1) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	40	35
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	81	161
Significant Other Observable Inputs (Level 2) [Member] | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	45	43
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	36	40
Significant Other Observable Inputs (Level 2) [Member] | Foreign Currency Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivatives		78
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	48	47
Significant Unobservable Inputs (Level 3) [Member] | Redeemable Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 48	$ 47

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Carrying value of debt	$ 9,530	$ 8,929
Net borrowings	577
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Carrying value of debt	9,500	8,900
Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Fair value of debt	$ 10,400	$ 9,200

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Trust for Final Capping Closure Post Closure or Environmental Remediation Obligations [Member]
Variable Interest Entity [Line Items]
Variable interest entities primary beneficiary trust fair value assets	$ 95	$ 94
Carrying value of trusts for which company is not the sole beneficiary	95	93
Investment in Refined Coal Facility and Low Income Housing Properties [Member]
Variable Interest Entity [Line Items]
Aggregate investment balance	98	110
Investment in Low-Income Housing Properties [Member]
Variable Interest Entity [Line Items]
Equity method investments debt balance	$ 68	$ 80

Condensed Consolidating Finan58

Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 39	$ 39	$ 273	$ 1,307
Other current assets	2,237	2,306
Total current assets	2,276	2,345
Property and equipment, net	10,841	10,665
Other assets	7,635	7,357
Total assets	20,752	20,367
Current liabilities:
Current portion of long-term debt	614	253
Accounts payable and other current liabilities	2,192	2,257
Total current liabilities	2,806	2,510
Long-term debt, less current portion	8,916	8,676
Other liabilities	3,802	3,814
Total liabilities	15,524	15,000
Equity:
Stockholders' equity	5,208	5,345
Noncontrolling interests	20	22
Total equity	5,228	5,367
Total liabilities and equity	20,752	20,367
Eliminations [Member]
Current assets:
Investments in and advances to affiliates	(46,312)	(44,833)
Total assets	(46,312)	(44,833)
Current liabilities:
Due to affiliates	(7,490)	(7,365)
Total liabilities	(7,490)	(7,365)
Equity:
Stockholders' equity	(38,822)	(37,468)
Total equity	(38,822)	(37,468)
Total liabilities and equity	(46,312)	(44,833)
WM [Member]
Current assets:
Cash and cash equivalents			148	1,235
Other current assets	6	3
Total current assets	6	3
Investments in and advances to affiliates	19,194	18,557
Other assets	15	23
Total assets	19,215	18,583
Current liabilities:
Current portion of long-term debt	500	41
Accounts payable and other current liabilities	84	83
Total current liabilities	584	124
Long-term debt, less current portion	6,073	5,801
Due to affiliates	7,334	7,289
Other liabilities	16	24
Total liabilities	14,007	13,238
Equity:
Stockholders' equity	5,208	5,345
Total equity	5,208	5,345
Total liabilities and equity	19,215	18,583
WM Holdings [Member]
Current assets:
Other current assets	7	6
Total current assets	7	6
Investments in and advances to affiliates	19,628	18,911
Other assets	30	29
Total assets	19,665	18,946
Current liabilities:
Accounts payable and other current liabilities	11	9
Total current liabilities	11	9
Long-term debt, less current portion	304	304
Due to affiliates	156	76
Total liabilities	471	389
Equity:
Stockholders' equity	19,194	18,557
Total equity	19,194	18,557
Total liabilities and equity	19,665	18,946
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	39	39	$ 125	$ 72
Other current assets	2,224	2,297
Total current assets	2,263	2,336
Property and equipment, net	10,841	10,665
Investments in and advances to affiliates	7,490	7,365
Other assets	7,590	7,305
Total assets	28,184	27,671
Current liabilities:
Current portion of long-term debt	114	212
Accounts payable and other current liabilities	2,097	2,165
Total current liabilities	2,211	2,377
Long-term debt, less current portion	2,539	2,571
Other liabilities	3,786	3,790
Total liabilities	8,536	8,738
Equity:
Stockholders' equity	19,628	18,911
Noncontrolling interests	20	22
Total equity	19,648	18,933
Total liabilities and equity	$ 28,184	$ 27,671

Condensed Consolidating Finan59

Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheets (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Long-term debt, less current portion	$ 8,916	$ 8,676
WM [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term debt, less current portion	6,073	$ 5,801
WM [Member] | Immaterial Corrections from Non-Guarantor Subsidiaries to WM [Member] | Tax-exempt Bonds [Member]
Condensed Financial Statements, Captions [Line Items]
Long-term debt, less current portion	$ 126

Condensed Consolidating Finan60

Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]
Operating revenues	$ 3,425	$ 3,315	$ 6,601	$ 6,355
Costs and expenses	2,814	2,813	5,482	5,413
Income from operations	611	502	1,119	942
Other income (expense):
Interest expense, net	(93)	(95)	(188)	(199)
Loss on early extinguishment of debt	(3)	(2)	(4)	(552)
Other, net	(56)	(16)	(72)	(24)
Total other income (expense)	(152)	(113)	(264)	(775)
Income (loss) before income taxes	459	389	855	167
Provision for (benefit from) income taxes	173	116	313	25
Consolidated net income	286	273	542	142
Less: Net income (loss) attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Net income attributable to Waste Management, Inc.	287	274	545	145
Eliminations [Member]
Other income (expense):
Equity in earnings of subsidiaries, net of taxes	(669)	(637)	(1,280)	(1,141)
Total other income (expense)	(669)	(637)	(1,280)	(1,141)
Income (loss) before income taxes	(669)	(637)	(1,280)	(1,141)
Consolidated net income	(669)	(637)	(1,280)	(1,141)
Net income attributable to Waste Management, Inc.	(669)	(637)	(1,280)	(1,141)
WM [Member]
Other income (expense):
Interest expense, net	(76)	(75)	(150)	(154)
Loss on early extinguishment of debt		(2)	(1)	(500)
Equity in earnings of subsidiaries, net of taxes	333	320	637	551
Total other income (expense)	257	243	486	(103)
Income (loss) before income taxes	257	243	486	(103)
Provision for (benefit from) income taxes	(30)	(31)	(59)	(248)
Consolidated net income	287	274	545	145
Net income attributable to Waste Management, Inc.	287	274	545	145
WM Holdings [Member]
Condensed Income Statements, Captions [Line Items]
Costs and expenses		(6)
Income from operations		6
Other income (expense):
Interest expense, net	(5)	(5)	(10)	(12)
Loss on early extinguishment of debt				(52)
Equity in earnings of subsidiaries, net of taxes	336	317	643	590
Total other income (expense)	331	312	633	526
Income (loss) before income taxes	331	318	633	526
Provision for (benefit from) income taxes	(2)	(2)	(4)	(25)
Consolidated net income	333	320	637	551
Net income attributable to Waste Management, Inc.	333	320	637	551
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Operating revenues	3,425	3,315	6,601	6,355
Costs and expenses	2,814	2,819	5,482	5,413
Income from operations	611	496	1,119	942
Other income (expense):
Interest expense, net	(12)	(15)	(28)	(33)
Loss on early extinguishment of debt	(3)		(3)
Other, net	(56)	(16)	(72)	(24)
Total other income (expense)	(71)	(31)	(103)	(57)
Income (loss) before income taxes	540	465	1,016	885
Provision for (benefit from) income taxes	205	149	376	298
Consolidated net income	335	316	640	587
Less: Net income (loss) attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Net income attributable to Waste Management, Inc.	$ 336	$ 317	$ 643	$ 590

Condensed Consolidating Finan61

Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]
Comprehensive income	$ 295	$ 289	$ 620	$ 85
Less: Comprehensive income (loss) attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Comprehensive income attributable to Waste Management, Inc.	296	290	623	88
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Comprehensive income	(669)	(637)	(1,280)	(1,141)
Comprehensive income attributable to Waste Management, Inc.	(669)	(637)	(1,280)	(1,141)
WM [Member]
Condensed Income Statements, Captions [Line Items]
Comprehensive income	289	276	549	151
Comprehensive income attributable to Waste Management, Inc.	289	276	549	151
WM Holdings [Member]
Condensed Income Statements, Captions [Line Items]
Comprehensive income	333	320	637	551
Comprehensive income attributable to Waste Management, Inc.	333	320	637	551
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Comprehensive income	342	330	714	524
Less: Comprehensive income (loss) attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Comprehensive income attributable to Waste Management, Inc.	$ 343	$ 331	$ 717	$ 527

Condensed Consolidating Finan62

Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Consolidated net income	$ 286	$ 273	$ 542	$ 142
Other adjustments			912	1,173
Net cash provided by operating activities			1,454	1,315
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired			(572)	(454)
Capital expenditures			(629)	(529)
Proceeds from divestitures of businesses and other assets (net of cash divested)			24	78
Net receipts from restricted trust and escrow accounts and other, net			(9)	26
Net cash used in investing activities			(1,186)	(879)
Cash flows from financing activities:
New borrowings			2,094	1,866
Debt repayments			(1,517)	(2,181)
Premiums paid on early extinguishment of debt			(2)	(555)
Common stock repurchases			(500)	(300)
Cash dividends			(364)	(351)
Exercise of common stock options			44	47
Other, net			(24)	5
Net cash used in financing activities			(269)	(1,469)
Effect of exchange rate changes on cash and cash equivalents			1	(1)
Increase (decrease) in cash and cash equivalents				(1,034)
Cash and cash equivalents at beginning of period			39	1,307
Cash and cash equivalents at end of period	39	273	39	273
Eliminations [Member]
Cash flows from operating activities:
Consolidated net income	(669)	(637)	(1,280)	(1,141)
Equity in earnings of subsidiaries, net of taxes	669	637	1,280	1,141
WM [Member]
Cash flows from operating activities:
Consolidated net income	287	274	545	145
Equity in earnings of subsidiaries, net of taxes	(333)	(320)	(637)	(551)
Other adjustments			6	5
Net cash provided by operating activities			(86)	(401)
Cash flows from financing activities:
New borrowings			1,647	1,781
Debt repayments			(1,038)	(1,825)
Premiums paid on early extinguishment of debt			(1)	(503)
Common stock repurchases			(500)	(300)
Cash dividends			(364)	(351)
Exercise of common stock options			44	47
Other, net			15	5
(Increase) decrease in intercompany and investments, net			283	460
Net cash used in financing activities			86	(686)
Increase (decrease) in cash and cash equivalents				(1,087)
Cash and cash equivalents at beginning of period				1,235
Cash and cash equivalents at end of period		148		148
WM Holdings [Member]
Cash flows from operating activities:
Consolidated net income	333	320	637	551
Equity in earnings of subsidiaries, net of taxes	(336)	(317)	(643)	(590)
Other adjustments			(1)	(5)
Net cash provided by operating activities			(7)	(44)
Cash flows from financing activities:
Debt repayments				(144)
Premiums paid on early extinguishment of debt				(52)
(Increase) decrease in intercompany and investments, net			7	240
Net cash used in financing activities			7	44
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Consolidated net income	335	316	640	587
Other adjustments			907	1,173
Net cash provided by operating activities			1,547	1,760
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired			(572)	(454)
Capital expenditures			(629)	(529)
Proceeds from divestitures of businesses and other assets (net of cash divested)			24	78
Net receipts from restricted trust and escrow accounts and other, net			(9)	26
Net cash used in investing activities			(1,186)	(879)
Cash flows from financing activities:
New borrowings			447	85
Debt repayments			(479)	(212)
Premiums paid on early extinguishment of debt			(1)
Other, net			(39)
(Increase) decrease in intercompany and investments, net			(290)	(700)
Net cash used in financing activities			(362)	(827)
Effect of exchange rate changes on cash and cash equivalents			1	(1)
Increase (decrease) in cash and cash equivalents				53
Cash and cash equivalents at beginning of period			39	72
Cash and cash equivalents at end of period	$ 39	$ 125	$ 39	$ 125