Condensed Consolidated Balance Sheets (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 371	$ 539
Accounts receivable, net of allowance for doubtful accounts of $24 and $26, respectively	1,609	1,510
Other receivables	104	146
Parts and supplies	137	130
Deferred income taxes	39	40
Other assets	114	117
Total current assets	2,374	2,482
Property and equipment, net of accumulated depreciation and amortization of $14,957 and $14,690, respectively	11,919	11,868
Goodwill	5,793	5,726
Other intangible assets, net	310	295
Other assets	1,187	1,105
Total assets	21,583	21,476
Current liabilities:
Accounts payable	576	692
Accrued liabilities	1,056	1,100
Deferred revenues	465	460
Current portion of long-term debt	198	233
Total current liabilities	2,295	2,485
Long-term debt, less current portion	8,839	8,674
Deferred income taxes	1,704	1,662
Landfill and environmental remediation liabilities	1,436	1,402
Other liabilities	686	662
Total liabilities	14,960	14,885
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	4,545	4,528
Retained earnings	6,499	6,400
Accumulated other comprehensive income	259	230
Treasury stock at cost, 157,950,900 and 155,235,711 shares, respectively	(5,018)	(4,904)
Total Waste Management, Inc. stockholders' equity	6,291	6,260
Noncontrolling interests	332	331
Total equity	6,623	6,591
Total liabilities and equity	$ 21,583	$ 21,476