CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Consolidated net income	$ 1,392	$ 1,046
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	1,107	1,034
Deferred income tax benefit	(32)	(46)
Interest accretion on landfill liabilities	71	68
Provision for bad debts	35	31
Equity-based compensation expense	63	74
Net gain on disposal of assets	(21)	(7)
(Gain) loss from divestitures, asset impairments and unusual items, net	(14)	38
Equity in net losses of unconsolidated entities, net of dividends	29	25
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	43	112
Other current assets	(22)	(25)
Other assets	(3)	(2)
Accounts payable and accrued liabilities	177	105
Deferred revenues and other liabilities	(167)	(65)
Net cash provided by operating activities	2,658	2,388
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(342)	(78)
Capital expenditures	(1,240)	(981)
Proceeds from divestitures of businesses and other assets (net of cash divested)	106	19
Other, net	(30)	(10)
Net cash used in investing activities	(1,506)	(1,050)
Cash flows from financing activities:
New borrowings	174	197
Debt repayments	(338)	(749)
Net commercial paper borrowings	523	501
Common stock repurchase program	(750)	(750)
Cash dividends	(605)	(566)
Exercise of common stock options	45	92
Tax payments associated with equity-based compensation transactions	(28)	(47)
Other, net	(36)	(9)
Net cash used in financing activities	(1,015)	(1,331)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents		1
Increase in cash, cash equivalents and restricted cash and cash equivalents	137	8
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	293	94
Cash, cash equivalents and restricted cash and cash equivalents at end of period	$ 430	$ 102