Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2023 and 2022 were as follows:

	Pension and Other Post-Retirement Benefits Liability, Net of Tax		Cumulative Foreign Currency Exchange, Net of Tax		Other, Net of Tax		Total
Balances at December 31, 2022	$	52	$	(141)	$	—	$	(89)
Net other comprehensive income (loss) attributable to Westlake Corporation	—		23		(1)		22
Balances at March 31, 2023	$	52	$	(118)	$	(1)	$	(67)
Balances at December 31, 2021	$	20	$	(56)	$	—	$	(36)
Net other comprehensive loss attributable to Westlake Corporation	—		(9)		—		(9)
Balances at March 31, 2022	$	20	$	(65)	$	—	$	(45)