Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 2,085	$ 2,919
Available-for-sale securities	192	0
Accounts receivable, net	1,832	1,483
Inventories	1,731	1,697
Prepaid expenses and other current assets	106	115
Total current assets	5,946	6,214
Property, plant and equipment, net	8,827	8,633
Operating lease right-of-use assets	824	801
Goodwill	2,044	2,031
Customer relationships, net	785	820
Other intangible assets, net	454	462
Equity method investments	1,074	1,081
Other assets, net	852	708
Total assets	20,806	20,750
Current liabilities
Accounts payable	926	851
Accrued and other liabilities	1,477	1,368
Total current liabilities	2,403	2,219
Long-term debt, net	4,654	4,556
Deferred income taxes	1,524	1,553
Pension and other post-retirement benefits	325	304
Operating lease liabilities	731	713
Other liabilities	378	362
Total liabilities	10,015	9,707
Commitments and contingencies (Note 13)
Stockholders' equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value, 300,000,000 shares authorized; 134,651,380 and 134,651,380 shares issued at June 30, 2025 and December 31, 2024, respectively	1	1
Common stock, held in treasury, at cost; 6,412,294 and 6,424,366 shares at June 30, 2025 and December 31, 2024, respectively	(484)	(467)
Additional paid-in capital	662	656
Retained earnings	10,163	10,481
Accumulated other comprehensive loss	(64)	(144)
Total Westlake Corporation stockholders' equity	10,278	10,527
Noncontrolling interests	513	516
Total equity	10,791	11,043
Total liabilities and equity	$ 20,806	$ 20,750