Acquisitions (Tables) - USD ($)
$ in Millions

3 Months Ended

Feb. 01, 2022

Mar. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Cash	$	42
Accounts receivable	299
Inventories	346
Prepaid expenses and other current assets	21
Property, plant and equipment	667
Operating lease right-of-use assets	66
Intangible assets:
Trade names	75
Technology	50
Customer relationships	30
Other assets	96
Total assets acquired	1,692
Accounts payable	191
Accrued and other liabilities	84
Deferred income taxes	94
Pensions and other post-retirement benefits	163
Operating lease liabilities	51
Other liabilities	19
Total liabilities assumed	602
Total identifiable net assets acquired	1,090
Noncontrolling interest	(2)
Goodwill	119
Total Westlake Corporation purchase consideration	$	1,207

Goodwill acquired during the period

$ 119

Business Acquisition, Pro Forma Information

	Three Months Ended March 31,
	2022		2021
Net sales	$	4,215	$	2,698
Net income attributable to Westlake Corporation	$	817	$	217