Consolidated Statements of Cash Flows $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Cash flows from operating activities:
Consolidated net income	$ 752	$ 1,338	$ 130
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	1,245	1,292	1,333
Deferred income tax (benefit) provision	30	(118)	(149)
Interest accretion on landfill liabilities	89	88	87
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets	1	14	(10)
Provision for bad debts	36	42	39
Equity-based compensation expense	72	65	58
Excess tax benefits associated with equity-based transactions	(15)	(5)	(10)
Net gain on disposal of assets	(18)	(35)	(21)
Effect of goodwill impairments		10	509
Effect of (income) expense from divestitures, asset impairments (other than goodwill) and unusual items and other	87	(137)	535
Equity in net losses of unconsolidated entities, net of dividends	42	42	34
Loss on early extinguishment of debt	555
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	(178)	(268)	44
Other current assets	16	(19)	(7)
Other assets	(7)	22	4
Accounts payable and accrued liabilities	(112)	117	(27)
Deferred revenues and other liabilities	(97)	(117)	(94)
Net cash provided by operating activities	2,498	2,331	2,455
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(554)	(35)	(724)
Capital expenditures	(1,233)	(1,151)	(1,271)
Proceeds from divestitures of businesses and other assets (net of cash divested)	145	2,253	138
Net receipts from restricted trust and escrow accounts	51	19	71
Investments in unconsolidated entities	(20)	(33)	(33)
Other	3	(58)	(81)
Net cash provided by (used in) investing activities	(1,608)	995	(1,900)
Cash flows from financing activities:
New borrowings	2,337	2,817	2,232
Debt repayments	(2,764)	(3,568)	(2,077)
Premiums paid on early extinguishment of debt	(555)
Common stock repurchases	(600)	(600)	(239)
Cash dividends	(695)	(693)	(683)
Exercise of common stock options	77	93	132
Excess tax benefits associated with equity-based transactions	15	5	10
Acquisitions of and distributions paid to noncontrolling interests	(1)	(125)	(59)
Other	31	(1)	(3)
Net cash used in financing activities	(2,155)	(2,072)	(687)
Effect of exchange rate changes on cash and cash equivalents	(3)	(5)	(4)
Increase (decrease) in cash and cash equivalents	(1,268)	1,249	(136)
Cash and cash equivalents at beginning of year	1,307	58	194
Cash and cash equivalents at end of year	$ 39	$ 1,307	$ 58