Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Metals inventory adjustments	$ 83	$ 59
Cash flow from operating activities:
Net income (loss)	(425)	2
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation, depletion and amortization	699	699
Metals inventory adjustments		59
Gain (Loss) on Disposition of Assets	(11)	25
Stock-based compensation	43	40
Net charges for environmental and asset retirement obligations, including accretion	112	109
Payments for environmental and asset retirement obligations	(119)	(100)
Net charges for defined pension and postretirement plans	45	53
Pension plan contributions	(29)	(33)
Net loss on early extinguishment of debt	41	6
Deferred income taxes	(28)	20
Other, net	(46)	40
Changes in working capital and other:
Accounts receivable	83	256
Inventories	168	254
Other current assets	(4)	(26)
Accounts payable and accrued liabilities	(73)	9
Accrued income taxes and timing of other tax payments	(33)	(245)
Net cash provided by operating activities	453	1,088
Cash flow from investing activities:
Capital expenditures	(1,137)	(1,251)
Proceeds from Sale of Other Assets, Investing Activities	116	94
Other, net	(5)	(10)
Net cash used in investing activities	(1,026)	(1,167)
Cash flow from financing activities:
Proceeds from debt	1,585	328
Repayments of debt	(1,527)	(1,563)
Cash dividends and distributions paid:
Common stock	(73)	(146)
Noncontrolling interests	0	(79)
Contributions from noncontrolling interests	74	100
Stock-based awards net payments	(4)	(6)
Payments of Financing Costs	(31)	(4)
Net cash provided by (used in) financing activities	24	(1,370)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(549)	(1,449)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	2,278	4,455
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period	1,729	3,006
North America Copper Mines Segment [Member]
Cash flow from investing activities:
Capital expenditures	(332)	(417)
South America Mines Segment [Member]
Cash flow from investing activities:
Capital expenditures	(125)	(108)
Grasberg Segment [Member]
Cash flow from investing activities:
Capital expenditures	(634)	(658)
Molybdenum
Cash flow from investing activities:
Capital expenditures	(11)	(6)
Other Segments [Member]
Cash flow from investing activities:
Capital expenditures	(35)	(62)
Surface Water Taxes, Papua, Indonesia [Member]
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Charges for Cerro Verde royalty dispute	0	28
Cerro Verde Royalty Dispute
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Charges for Cerro Verde royalty dispute	15	28
Payments for Cerro Verde royalty dispute	$ (90)	$ (86)