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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities:      
Consolidated net income $ 1,180 $ 752 $ 1,338
Adjustments to reconcile consolidated net income to net cash provided by operating activities:      
Depreciation and amortization 1,301 1,245 1,292
Deferred income tax (benefit) provision 73 30 (118)
Interest accretion on landfill liabilities 91 89 88
Interest accretion on and discount rate adjustments to environmental remediation liabilities and recovery assets   1 14
Provision for bad debts 42 36 42
Equity-based compensation expense 90 72 65
Excess tax benefits associated with equity-based transactions (28) (15) (5)
Net gain on disposal of assets (24) (18) (35)
(Income) expense from divestitures, asset impairments and other, net 110 87 (127)
Equity in net losses of unconsolidated entities, net of dividends 44 42 42
Loss on early extinguishment of debt 4 555  
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:      
Receivables (78) (178) (268)
Other current assets (12) 16 (19)
Other assets 78 (7) 22
Accounts payable and accrued liabilities 174 (112) 117
Deferred revenues and other liabilities (85) (97) (117)
Net cash provided by operating activities 2,960 2,498 2,331
Cash flows from investing activities:      
Acquisitions of businesses, net of cash acquired (611) (554) (35)
Capital expenditures (1,339) (1,233) (1,151)
Proceeds from divestitures of businesses and other assets (net of cash divested) 43 145 2,253
Net receipts from restricted trust and escrow accounts   51 19
Investments in unconsolidated entities (21) (20) (33)
Other, net (4) 3 (58)
Net cash provided by (used in) investing activities (1,932) (1,608) 995
Cash flows from financing activities:      
New borrowings 3,057 2,337 2,817
Debt repayments (2,682) (2,764) (3,568)
Premiums paid on early extinguishment of debt (2) (555)  
Common stock repurchase program (725) (600) (600)
Cash dividends (726) (695) (693)
Exercise of common stock options 63 77 93
Excess tax benefits associated with equity-based transactions 28 15 5
Acquisitions of and distributions paid to noncontrolling interests (1) (1) (125)
Other, net (47) 31 (1)
Net cash used in financing activities (1,035) (2,155) (2,072)
Effect of exchange rate changes on cash and cash equivalents   (3) (5)
Increase (decrease) in cash and cash equivalents (7) (1,268) 1,249
Cash and cash equivalents at beginning of year 39 1,307 58
Cash and cash equivalents at end of year $ 32 $ 39 $ 1,307