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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities:    
Consolidated net income $ 658 $ 542
Adjustments to reconcile consolidated net income to net cash provided by operating activities:    
Depreciation and amortization 684 652
Deferred income tax benefit (3) (14)
Interest accretion on landfill liabilities 45 44
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets 1 8
Provision for bad debts 21 18
Equity-based compensation expense 54 51
Net gain from disposal of assets (5) (10)
Expense from divestitures, asset impairments and other, net 29 42
Equity in net losses of unconsolidated entities, net of dividends 17 23
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:    
Receivables 43 66
Other current assets (3) (8)
Other assets (6) 75
Accounts payable and accrued liabilities 32 44
Deferred revenues and other liabilities (33) (39)
Net cash provided by operating activities 1,534 1,494
Cash flows from investing activities:    
Acquisitions of businesses, net of cash acquired (51) (572)
Capital expenditures (631) (629)
Proceeds from divestitures of businesses and other assets (net of cash divested) 13 24
Other, net (8) (9)
Net cash used in investing activities (677) (1,186)
Cash flows from financing activities:    
New borrowings 86 2,094
Debt repayments (627) (1,517)
Net commercial paper borrowings 253  
Common stock repurchase program (250) (500)
Cash dividends (381) (364)
Exercise of common stock options 86 44
Tax payments associated with equity-based compensation transactions (47) (23)
Other, net 23 (43)
Net cash used in financing activities (857) (309)
Effect of exchange rate changes on cash and cash equivalents   1
Increase (decrease) in cash and cash equivalents 0 0
Cash and cash equivalents at beginning of period 32 39
Cash and cash equivalents at end of period $ 32 $ 39