Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Consolidated net income	$ 1,046	$ 846
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	1,034	988
Deferred income tax expense (benefit)	(46)	20
Interest accretion on landfill liabilities	68	67
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets	2	8
Provision for bad debts	31	27
Equity-based compensation expense	74	67
Net gain from disposal of assets	(7)	(18)
Expense from divestitures, asset impairments and other, net	38	106
Equity in net losses of unconsolidated entities, net of dividends	25	32
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	112	32
Other current assets	(25)	(21)
Other assets		76
Accounts payable and accrued liabilities	105	73
Deferred revenues and other liabilities	(67)	(51)
Net cash provided by operating activities	2,390	2,252
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(80)	(600)
Capital expenditures	(981)	(962)
Proceeds from divestitures of businesses and other assets (net of cash divested)	19	32
Other, net	58	(20)
Net cash used in investing activities	(984)	(1,550)
Cash flows from financing activities:
New borrowings	122	2,536
Debt repayments	(749)	(2,210)
Net commercial paper borrowings	501
Common stock repurchase program	(750)	(500)
Cash dividends	(566)	(546)
Exercise of common stock options	92	57
Tax payments associated with equity-based compensation transactions	(47)	(30)
Other, net	(7)	(18)
Net cash used in financing activities	(1,404)	(711)
Effect of exchange rate changes on cash and cash equivalents	1
Increase (decrease) in cash and cash equivalents	3	(9)
Cash and cash equivalents at beginning of period	32	39
Cash and cash equivalents at end of period	$ 35	$ 30