v3.26.1
Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Statement of Comprehensive Income [Abstract]        
Net income (loss) $ 271 $ (131) $ 114 $ (166)
Pension and other post-retirement benefits liability        
Pension and other post-retirement benefits reserves adjustment 0 1 0 1
Income tax provision on pension and other post-retirement benefits liability 0 0 0 0
Foreign currency translation adjustments        
Foreign currency translation gain (loss) (14) 51 (29) 57
Income tax benefit (provision) on foreign currency translation (2) 18 (6) 26
Available-for-sale investments        
Unrealized holding losses on investments 0 0 (1) 0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax 0 0 0 0
Other comprehensive income (loss), net of income taxes (16) 70 (36) 84
Comprehensive income (loss) 255 (61) 78 (82)
Comprehensive income attributable to noncontrolling interests, net of tax of $1 and $0 for the three months ended June 30, 2026 and 2025, respectively; and net of tax of $2 and $1 for the six months ended June 30, 2026 and 2025, respectively 12 15 23 20
Comprehensive income (loss) attributable to Westlake Corporation $ 243 $ (76) $ 55 $ (102)