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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Statement of Comprehensive Income [Abstract]    
Net income $ 466 $ 703
Other comprehensive income (loss), before tax:    
Pension and other postretirement benefit (expense) (5) 6
Other comprehensive income (loss) of equity investees (1) 6
Other comprehensive income (loss), before tax (6) 12
Income tax benefit (expense) related to items of other comprehensive income (loss) 2 (4)
Other comprehensive income (loss), net of tax (4) 8
Total comprehensive income $ 462 $ 711