CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Consolidated net income	$ 772	$ 668
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	972	816
Deferred income tax benefit	(67)	(35)
Interest accretion on landfill liabilities	53	49
Provision for bad debts	17	36
Equity-based compensation expense	45	23
Net gain on disposal of assets	(12)	(7)
Loss from divestitures, asset impairments and other, net	17	68
Equity in net losses of unconsolidated entities, net of dividends	22	33
Loss on early extinguishment of debt, net	220
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Receivables	(24)	185
Other current assets	(22)	(1)
Other assets	9	14
Accounts payable and accrued liabilities	213	(171)
Deferred revenues and other liabilities	(52)	(57)
Net cash provided by operating activities	2,163	1,621
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(10)	(1)
Capital expenditures	(666)	(895)
Proceeds from divestitures of businesses and other assets (net of cash divested)	17	15
Other, net	(49)	(37)
Net cash used in investing activities	(708)	(918)
Cash flows from financing activities:
New borrowings	1,707
Debt repayments	(2,326)	(705)
Premiums and other paid on early extinguishment of debt	(211)
Common stock repurchase program	(500)	(402)
Cash dividends	(489)	(466)
Exercise of common stock options	41	42
Tax payments associated with equity-based compensation transactions	(28)	(34)
Other, net	(4)	(10)
Net cash used in financing activities	(1,810)	(1,575)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents	4	(3)
Decrease in cash, cash equivalents and restricted cash and cash equivalents	(351)	(875)
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	648	3,647
Cash, cash equivalents and restricted cash and cash equivalents at end of period	$ 297	$ 2,772