CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flow from operating activities:
Net income (loss)	$ 2,095	$ (4,025)	$ (12,089)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	1,714	2,610	3,497
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)	(393)	0	0
Litigation Settlement, Expense	355	0	0
Payments for Legal Settlements	(53)	(30)	(34)
Impairment of Oil and Gas Properties	0	4,317	13,144
Oil and gas noncash drillship settlement costs and other adjustments	(33)	803	137
Oil and gas contract settlement payments	(70)	0	0
Metals inventory adjustments	8	36	338
Mining asset impairments and restructuring	40	20	119
Net gain on sales of assets	(81)	(649)	(39)
Stock-based compensation	71	86	85
Net charges for environmental and asset retirement obligations, including accretion	383	191	209
Payments for environmental and asset retirement obligations	131	242	198
Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash	120	113	105
Payment for Pension and Other Postretirement Benefits	(174)	(57)	(140)
Net gain on early extinguishment and exchanges of debt	(21)	(26)	0
Deferred income taxes	76	239	(2,039)
Loss on disposal of discontinued operations	57	(198)	0
Decrease (increase) in long-term mill and leach stockpiles	224	10	(212)
Other Operating Activities, Cash Flow Statement	20	48	(70)
Changes in working capital and other tax payments, excluding disposition amounts:
Accounts receivable	427	(175)	813
Inventories	(393)	117	379
Other current assets	(28)	37	97
Accounts payable and accrued liabilities	110	(28)	(217)
Accrued income taxes and timing of other tax payments	473	136	(665)
Net cash provided by operating activities	4,682	3,729	3,220
Cash flow from investing activities:
Capital expenditures	(1,410)	(2,813)	(6,353)
Proceeds from sales of:
Other assets	72	423	160
Other, net	(25)	8	(53)
Net cash (used in) provided by investing activities	(1,363)	3,550	(6,246)
Cash flow from financing activities:
Proceeds from debt	955	3,681	8,272
Repayments of debt	(3,812)	(7,625)	(6,677)
Net proceeds from sale of common stock	0	1,515	1,936
Cash dividends and distributions paid:
Common stock	(2)	(6)	(605)
Noncontrolling interests, including redemption	(174)	(693)	(120)
Stock-based awards net payments	(10)	(6)	(4)
Debt financing costs and other, net	(12)	(32)	(16)
Net cash (used in) provided by financing activities	(3,055)	(3,166)	2,786
Net increase (decrease) in cash and cash equivalents	264	4,113	(240)
(Increase) decrease in cash and cash equivalents in assets held for sale	(62)	(45)	119
Cash and cash equivalents at beginning of year	4,245	177	298
Cash and cash equivalents at end of year	4,447	4,245	177
Tenke Fungurume mine
Proceeds from sales of:
Proceeds from sales	0	2,664	0
Deepwater Gulf of Mexico and onshore California oil and gas properties
Proceeds from sales of:
Proceeds from sales	0	2,272	0
Morenci
Proceeds from sales of:
Proceeds from sales	0		0
North America copper mines
Cash flow from investing activities:
Capital expenditures	(167)	(102)	(355)
South America
Cash flow from investing activities:
Capital expenditures	(115)	(382)	(1,722)
Indonesia
Cash flow from investing activities:
Capital expenditures	(875)	(1,025)	(901)
Molybdenum mines
Cash flow from investing activities:
Capital expenditures	(5)	(2)	(13)
Other, including oil and gas operations
Cash flow from investing activities:
Capital expenditures	$ (248)	$ (1,302)	$ (3,362)