Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Consolidated net income	$ 446	$ 450
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	618	600
Deferred income tax provision	39	25
Interest accretion on landfill liabilities	41	40
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets	3	15
Provision for bad debts	15	19
Equity-based compensation expense	27	20
Net gain on disposal of assets	(8)	(10)
Excess tax benefits associated with equity-based transactions	(7)	(1)
Equity in net losses of unconsolidated entities, net of dividends	13	5
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	(115)	(110)
Other current assets	(18)	(18)
Other assets	31	8
Accounts payable and accrued liabilities	25	(98)
Deferred revenues and other liabilities	(32)	31
Net cash provided by (used in) operating activities	1,078	976
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(157)	(237)
Capital expenditures	(596)	(475)
Proceeds from divestitures of businesses (net of cash divested) and other sales of assets	13	27
Net receipts from restricted trust and escrow accounts	7	26
Investments in unconsolidated entities	(91)	(161)
Other	0	(3)
Net cash used in investing activities	(824)	(823)
Cash flows from financing activities:
New borrowings	404	706
Debt repayments	(314)	(213)
Common stock repurchases	(168)	(286)
Cash dividends	(323)	(305)
Exercise of common stock options	35	13
Excess tax benefits associated with equity-based transactions	7	1
Distributions paid to noncontrolling interests	(22)	(22)
Other	(44)	(17)
Net cash provided by (used in) financing activities	(425)	(123)
Effect of exchange rate changes on cash and cash equivalents	3	(1)
Increase (decrease) in cash and cash equivalents	(168)	29
Cash and cash equivalents at beginning of period	539	1,140
Cash and cash equivalents at end of period	$ 371	$ 1,169