Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) by component for the six months ended June 30, 2021 and 2020 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 attributable to Westlake Chemical Corporation	—		8		8
Balances at June 30, 2021	$	(24)	$	(32)	$	(56)
Balances at December 31, 2019	$	3	$	(77)	$	(74)
Net other comprehensive loss attributable to Westlake Chemical Corporation	—		(13)		(13)
Balances at June 30, 2020	$	3	$	(90)	$	(87)