Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flow from operating activities:
Net income	$ 2,516	$ 886
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	1,351	1,257
Net gain on sales of assets	(126)	(66)
Stock-based Compensation	70	58
Net charges for Cerro Verde royalty dispute	0	359
Payments for Cerro Verde royalty dispute	(32)	(32)
Net charges for environmental and asset retirement obligations, including accretion	206	196
Payments for environmental and asset retirement obligations	(179)	(85)
Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash	59	95
Payment for Pension and Other Postretirement Benefits	(60)	(152)
Net (gain) loss on early extinguishment of debt	(8)	(8)
Deferred income taxes	202	77
Loss (gain) on disposal of discontinued operations	19	(41)
Increase (decrease) in long term mill and leach stockpiles	(54)	(181)
Non-cash drillship settlements/idle rig costs and other oil and gas adjustments	0	(33)
Oil and gas contract settlement payments	0	(70)
Other, net	7	1
Changes in working capital and other tax payments:
Accounts receivable	321	420
Inventories	(326)	(314)
Other current assets	(16)	(17)
Accounts payable and accrued liabilities	(2)	(93)
Accrued income taxes and timing of other tax payments	(131)	393
Net cash provided by operating activities	3,925	3,012
Cash flow from investing activities:
Capital expenditures	(1,391)	(1,020)
Proceeds from Sale of Other Assets, Investing Activities	10	68
Intangible water rights and other, net	(91)	(2)
Net cash used in investing activities	(1,472)	(954)
Cash flow from financing activities:
Proceeds from debt	475	795
Repayments of debt	(2,410)	(1,991)
Cash dividends paid:
Common stock	(145)	(2)
Noncontrolling interests	(241)	(67)
Stock-based awards net proceeds (payments)	4	(10)
Debt financing costs and other, net	(23)	(12)
Net cash used in financing activities	(2,340)	(1,287)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	113	771
Decrease (increase) in cash and cash equivalents in assets held for sale	55	(45)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	4,631	4,403
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period	4,799	5,129
North America Copper Mines Segment [Member]
Cash flow from investing activities:
Capital expenditures	(413)	(106)
South America Mines Segment [Member]
Cash flow from investing activities:
Capital expenditures	(188)	(65)
Grasberg Segment [Member]
Cash flow from investing activities:
Capital expenditures	(695)	(663)
Molybdenum [Member]
Cash flow from investing activities:
Capital expenditures	(6)	(4)
Other Segments [Member]
Cash flow from investing activities:
Capital expenditures	$ (89)	$ (182)