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

12 Months Ended

Dec. 31, 2023

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						Balance at
	Beginning of		Costs and			Other			Other			End of
	Year		Expense			Accounts			Deductions			Year
Reserves and allowances deducted
from asset accounts:
Valuation allowance for deferred tax assets
Year Ended December 31, 2023	$	3,985	$	(80)	a	$	(11)	b	$	—		$	3,894
Year Ended December 31, 2022	4,087		(87)		c	(15)		b	—			3,985
Year Ended December 31, 2021	4,732		(596)		d	(49)		b	—			4,087
Reserves for non-income taxes:
Year Ended December 31, 2023	$	24	$	9		$	—		$	(5)	e	$	28
Year Ended December 31, 2022	59		(32)			—			(3)		e	24
Year Ended December 31, 2021	82		18			—			(41)		e	59

a.Primarily relates to $32 million of United States (U.S.) federal net operating losses (NOLs) utilized during 2023, and a $292 million decrease related to expirations of U.S. foreign tax credits, partially offset by an increase of $188 million, primarily associated with current year changes in U.S. federal temporary differences and a $22 million increase in valuation allowances against Section 163(j) deferred tax assets related to current year activity.

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

c.Primarily relates to $163 million of U.S. federal NOLs utilized during 2022 and a $22 million decrease related to expirations of U.S. foreign tax credits, partially offset by an increase of $104 million, primarily associated with current year changes in U.S. federal temporary differences.

d.Primarily relates to decreases of $219 million associated with U.S. federal NOL carryforwards utilized during 2021, $105 million related to expiration of U.S. foreign tax credits and $228 million associated with PT Rio Tinto NOLs resulting from positive evidence supporting future taxable income against which NOLs can be used.

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