CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Consolidated net income	$ 1,671	$ 1,923	$ 1,949
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	1,574	1,477	1,376
Deferred income tax expense (benefit)	100	25	(251)
Interest accretion on landfill liabilities	98	95	92
Provision for bad debts	39	54	43
Equity-based compensation expense	86	89	101
Net gain on disposal of assets	(27)	(47)	(20)
(Gain) loss from divestitures, asset impairments and other, net	113	(58)	43
Equity in net losses of unconsolidated entities, net of dividends	55	41	39
Loss on early extinguishment of debt	85		6
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	(53)	(16)	(271)
Other current assets	(23)	(16)	50
Other assets	10	(14)	(66)
Accounts payable and accrued liabilities	243	203	126
Deferred revenues and other liabilities	(97)	(186)	(37)
Net cash provided by operating activities	3,874	3,570	3,180
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(521)	(460)	(198)
Capital expenditures	(1,818)	(1,694)	(1,509)
Proceeds from divestitures of businesses and other assets (net of cash divested)	49	208	99
Other, net	(86)	(223)	(12)
Net cash used in investing activities	(2,376)	(2,169)	(1,620)
Cash flows from financing activities:
New borrowings	4,683	359	1,479
Debt repayments	(533)	(499)	(1,907)
Premiums paid on early extinguishment of debt	(84)		(8)
Net commercial paper borrowings (repayments)	(1,001)	453	513
Common stock repurchase program	(248)	(1,004)	(750)
Cash dividends	(876)	(802)	(750)
Exercise of common stock options	67	52	95
Tax payments associated with equity-based compensation transactions	(33)	(29)	(47)
Other, net	(11)	(38)	14
Net cash provided by (used in) financing activities	1,964	(1,508)	(1,361)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents	2	(3)
Increase (decrease) in cash, cash equivalents and restricted cash and cash equivalents	3,464	(110)	199
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	183	293	94
Cash, cash equivalents and restricted cash and cash equivalents at end of period	$ 3,647	$ 183	$ 293