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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash Flows From Operating Activities    
Net income $ 689 $ 761
Adjustments to reconcile net income to net cash provided by operating activities    
Depreciation, depletion and amortization 1,103 1,108
Deferred income taxes 388 413
Amortization of excess cost of equity investments 30 26
Loss on impairments and disposals of long-lived assets, net 231 104
Earnings from equity investments (200) (190)
Distributions from equity investment earnings 203 187
Noncash pension benefit credits 0 (23)
Changes in components of working capital, net of the effects of acquisitions and dispositions    
Accounts receivable, net 81 366
Income tax receivable 0 195
Inventories 49 (34)
Other current assets 7 50
Accounts payable (144) (222)
Accrued interest, net of interest rate swaps (49) 9
Accrued contingencies and other current liabilities 72 (7)
Rate reparations, refunds and other litigation reserve adjustments 31 27
Other, net (147) (232)
Net Cash Provided by Operating Activities 2,344 2,538
Cash Flows From Investing Activities    
Acquisitions of assets and investments, net of cash acquired (333) (1,919)
Capital expenditures (1,470) (1,909)
Sale of property, plant and equipment, investments, and other net assets, net of removal costs 220 4
Contributions to investments (363) (45)
Distributions from equity investments in excess of cumulative earnings 81 114
Other, net (15) 11
Net Cash Used in Investing Activities (1,880) (3,744)
Cash Flows From Financing Activities    
Issuances of debt 6,847 9,485
Payments of debt (6,800) (8,941)
Debt issue costs (6) (20)
Issuances of common shares 0 2,562
Cash dividends - common shares (559) (2,006)
Cash dividends - preferred shares (76) 0
Repurchases of warrants 0 (5)
Contributions from noncontrolling interests 87 0
Distributions to noncontrolling interests (11) (16)
Other, net 0 (1)
Net Cash (Used in) Provided by Financing Activities (518) 1,058
Effect of Exchange Rate Changes on Cash and Cash Equivalents 5 (4)
Net decrease in Cash and Cash Equivalents (49) (152)
Cash and Cash Equivalents, beginning of period 229 315
Cash and Cash Equivalents, end of period 180 163
Non-cash Investing and Financing Activities    
Assets acquired by the assumption or incurrence of liabilities 43 1,671
Net assets contributed to equity investment 37 34
Supplemental Disclosures of Cash Flow Information    
Cash paid during the period for interest (net of capitalized interest) 1,047 1,002
Cash paid (refunded) during the period for income taxes, net $ 5 $ (185)