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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Cash flow from operating activities:    
Net (loss) income $ (4,205) $ 1,286
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation, depletion and amortization 1,829 1,979
Impairment of oil and gas properties 5,790 0
Lower of cost or market inventory adjustments 63 0
Net gain on sale of assets (39) 0
Net (gains) losses on crude oil and natural gas derivative contracts (58) 120
Net charges for environmental and asset retirement obligations, including accretion 109 97
Payments for environmental and asset retirement obligations (81) (96)
Net gain on early extinguishment of debt 0 (5)
Deferred income taxes (1,432) 37
Increase in long-term mill and leach stockpiles (104) (131)
Other, net 104 77
Changes in working capital and other tax payments, excluding amounts from acquisitions and disposition:    
Accounts receivable 493 (243)
Inventories 8 (230)
Other current assets (1) 35
Accounts payable and accrued liabilities (205) (186)
Accrued income taxes and changes in other tax payments (485) (153)
Net cash provided by operating activities 1,786 2,587
Capital expenditures:    
North America copper mines (214) (627)
South America (902) (839)
Indonesia (438) (479)
Africa (97) (60)
Molybdenum mines (7) (33)
United States oil and gas operations (1,795) (1,484)
Other (75) (40)
Acquisition of Deepwater Gulf of Mexico interests 0 (925)
Net proceeds from sale of Eagle Ford shale assets 0 3,009
Other, net 136 (363)
Net cash used in investing activities (3,392) (1,841)
Cash flow from financing activities:    
Proceeds from debt 4,422 1,248
Repayments of debt (2,360) (1,611)
Cash dividends and distributions paid:    
Common stock (380) (653)
Noncontrolling interests (60) (250)
Stock-based awards net (payments) proceeds, including excess tax benefit (7) 3
Debt financing costs and other, net (7) (10)
Net cash provided by (used in) financing activities 1,608 (1,273)
Net increase (decrease) in cash and cash equivalents 2 (527)
Cash and cash equivalents at beginning of year 464 1,985
Cash and cash equivalents at end of period $ 466 $ 1,458