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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:      
Consolidated net income $ 1,496 $ 1,671 $ 1,923
Adjustments to reconcile consolidated net income to net cash provided by operating activities:      
Depreciation and amortization 1,671 1,574 1,477
Deferred income tax expense (benefit) 165 100 25
Interest accretion on landfill liabilities 103 98 95
Provision for bad debts 54 39 54
Equity-based compensation expense 94 86 89
Net gain on disposal of assets (9) (27) (47)
(Gain) loss from divestitures, asset impairments and other, net 43 113 (58)
Equity in net losses of unconsolidated entities, net of dividends 60 55 41
Loss on early extinguishment of debt, net 53 85  
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:      
Receivables (179) (53) (16)
Other current assets 10 (23) (16)
Other assets 53 10 (14)
Accounts payable and accrued liabilities (37) 243 203
Deferred revenues and other liabilities (174) (97) (186)
Net cash provided by operating activities 3,403 3,874 3,570
Cash flows from investing activities:      
Acquisitions of businesses, net of cash acquired (4,085) (521) (460)
Capital expenditures (1,632) (1,818) (1,694)
Proceeds from divestitures of businesses and other assets (net of cash divested) 885 49 208
Other, net (15) (86) (223)
Net cash used in investing activities (4,847) (2,376) (2,169)
Cash flows from financing activities:      
New borrowings 5,790 4,683 359
Debt repayments (7,807) (533) (499)
Premiums paid on early extinguishment of debt (30) (84)  
Net commercial paper borrowings (repayments) 1,808 (1,001) 453
Common stock repurchase program (402) (248) (1,004)
Cash dividends (927) (876) (802)
Exercise of common stock options 63 67 52
Tax payments associated with equity-based compensation transactions (34) (33) (29)
Other, net (20) (11) (38)
Net cash (used in) provided by financing activities (1,559) 1,964 (1,508)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents 4 2 (3)
(Decrease) increase in cash, cash equivalents and restricted cash and cash equivalents (2,999) 3,464 (110)
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period 3,647 183 293
Cash, cash equivalents and restricted cash and cash equivalents at end of period $ 648 $ 3,647 $ 183