SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Notes)

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

			Additions (Deductions)
	Balance at		Charged to			Charged to			Other			Balance at
	Beginning of		Costs and			Other			Additions			End of
	Year		Expense			Accounts			(Deductions)			Year
Reserves and allowances deducted
from asset accounts:
Valuation allowance for deferred tax assets
Year Ended December 31, 2020	$	4,576	$	200	a	$	(16)	b	$	(28)	c	$	4,732
Year Ended December 31, 2019	4,507		50		d	19		b	—			4,576
Year Ended December 31, 2018	4,575		(345)		e	8		b	269		f	4,507
Reserves for non-income taxes:
Year Ended December 31, 2020	$	58	$	21		$	(1)		$	4	g	$	82
Year Ended December 31, 2019	62		—			—			(4)		g	58
Year Ended December 31, 2018	58		7			(1)			(2)		g	62

a.Primarily relates to a $250 million increase in United States (U.S.) federal net operating loss (NOL) carryforwards, partly offset by a $75 million decrease in U.S foreign tax credits associated with expirations, and an $11 million decrease in U.S. deferred tax assets for which no benefit is expected to be realized.

b.Relates to a valuation allowance for tax benefits primarily associated with actuarial losses for U.S. defined benefit plans included in other comprehensive income (loss).

c.Relates to sale of interest in Kisanfu.

d.Primarily relates to a $208 million increase in U.S. federal deferred tax assets for which no benefit is expected to be realized, partly offset by a $98 million decrease in U.S. foreign tax credits associated with expirations and prior year adjustments, and a $44 million decrease in U.S. federal and state NOL carryforwards.

e.Primarily relates to a $315 million decrease in U.S. foreign tax credits associated with expirations and 2017 U.S. tax reform adjustments, and a decrease of $45 million in U.S. federal NOLs associated with 2018 usage and 2017 U.S. tax reform.

f.Primarily relates to a $244 million increase in foreign NOLs for which no benefit is expected to be realized resulting from PT Freeport Indonesia’s acquisition of PT Rio Tinto Indonesia.

g.Represents amounts paid or adjustments to reserves based on revised estimates.