CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 194	$ 258
Accounts receivable, net of allowance for doubtful accounts of $45 and $29, respectively	1,737	1,631
Other receivables	102	144
Parts and supplies	174	153
Deferred income taxes	76	78
Other assets	140	115
Total current assets	2,423	2,379
Property and equipment, net of accumulated depreciation and amortization of $16,112 and $15,308, respectively	12,651	12,242
Goodwill	6,291	6,215
Other intangible assets, net	397	457
Investments in unconsolidated entities	667	637
Other assets	668	639
Total assets	23,097	22,569
Current liabilities:
Accounts payable	842	838
Accrued liabilities	986	1,129
Deferred revenues	465	470
Current portion of long-term debt	743	631
Total current liabilities	3,036	3,068
Long-term debt, less current portion	9,173	9,125
Deferred income taxes	1,947	1,884
Landfill and environmental remediation liabilities	1,459	1,404
Other liabilities	807	698
Total liabilities	16,422	16,179
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	4,549	4,561
Retained earnings	6,879	6,721
Accumulated other comprehensive income	193	172
Treasury stock at cost, 166,062,235 and 169,749,709 shares, respectively	(5,273)	(5,390)
Total Waste Management, Inc. stockholders' equity	6,354	6,070
Noncontrolling interests	321	320
Total equity	6,675	6,390
Total liabilities and equity	$ 23,097	$ 22,569