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

12 Months Ended

Dec. 31, 2018

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, 2018	$	4,575	$	(345	)	a	$	8		b	$	269		c	$	4,507
Year Ended December 31, 2017	6,058		(1,484		)	d	1			b	—				4,575
Year Ended December 31, 2016	4,183		1,852				23			b	—				6,058
Reserves for non-income taxes:
Year Ended December 31, 2018	$	58	$	7			$	(1	)		$	(2	)	e	$	62
Year Ended December 31, 2017	64		(2		)		—				(4		)	e	58
Year Ended December 31, 2016	83		13				(3		)		(29		)	e	64

a. Primarily relates to a $305 million decrease in U.S. foreign tax credits associated with expirations and 2017 tax reform adjustments, and a decrease of $54 million in U.S. federal net operating losses associated with 2018 usage and 2017 tax reform.

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. Primarily relates to a $244 million increase in foreign net operating losses for which no benefit is expected to be realized resulting from PT-FI’s acquisition of PT Rio Tinto Indonesia.

d. Relates to a $1.1 billion decrease associated with a reduction in the corporate income tax rate applicable to U.S. federal deferred tax assets and $371 million for the reversal of valuation allowances on U.S. federal alternative minimum tax credits.

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