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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of Comprehensive Income [Abstract]        
Net income (loss) $ 8 $ 97 $ (2) $ 398
Amortization of prior service cost credit included in net periodic benefit cost, net of tax(a) [1] 0 0 (2) 0
Comprehensive income (loss) $ 8 $ 97 $ (4) $ 398
[1]
(a) Tax effects of the amortization of the prior service cost credit was insignificant for the three and six months ended June 30, 2024.