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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:      
Consolidated net income $ 1,817 $ 1,496 $ 1,671
Adjustments to reconcile consolidated net income to net cash provided by operating activities:      
Depreciation and amortization 1,999 1,671 1,574
Deferred income tax (benefit) expense (77) 165 100
Interest accretion on landfill and environmental remediation liabilities 111 103 98
Provision for bad debts 37 54 39
Equity-based compensation expense 108 94 86
Net gain on disposal of assets (25) (9) (27)
(Gain) loss from divestitures, asset impairments and other, net (16) 43 113
Equity in net losses of unconsolidated entities, net of dividends 38 60 55
Loss on early extinguishment of debt 220 53 85
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:      
Receivables 28 (179) (53)
Other current assets (39) 10 (23)
Other assets 34 53 10
Accounts payable and accrued liabilities 206 (37) 243
Deferred revenues and other liabilities (103) (174) (97)
Net cash provided by operating activities 4,338 3,403 3,874
Cash flows from investing activities:      
Acquisitions of businesses, net of cash acquired (75) (4,085) (521)
Capital expenditures (1,904) (1,632) (1,818)
Proceeds from divestitures of businesses and other assets, net of cash divested 96 885 49
Other, net (11) (15) (86)
Net cash used in investing activities (1,894) (4,847) (2,376)
Cash flows from financing activities:      
New borrowings 7,948 9,420 13,237
Debt repayments (8,404) (9,629) (10,088)
Premiums and other paid on early extinguishment of debt (211) (30) (84)
Common stock repurchase program (1,350) (402) (248)
Cash dividends (970) (927) (876)
Exercise of common stock options 66 63 67
Tax payments associated with equity-based compensation transactions (28) (34) (33)
Other, net 49 (20) (11)
Net cash (used in) provided by financing activities (2,900) (1,559) 1,964
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents 2 4 2
(Decrease) increase in cash, cash equivalents and restricted cash and cash equivalents (454) (2,999) 3,464
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period 648 3,647 183
Cash, cash equivalents and restricted cash and cash equivalents at end of period $ 194 $ 648 $ 3,647