Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) by component were as follows:

	Pension and Other Post-Retirement Benefits Liability, Net of Tax		Cumulative Foreign Currency Exchange, Net of Tax		Total
Balances at December 31, 2020	$	(24)	$	(40)	$	(64)
Net other comprehensive income (loss) attributable to Westlake Corporation	44		(16)		28
Balances at December 31, 2021	20		(56)		(36)
Net other comprehensive income (loss) attributable to Westlake Corporation	32		(85)		(53)
Balances at December 31, 2022	$	52	$	(141)	$	(89)