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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement of Comprehensive Income [Abstract]      
Net income $ 1,827 $ 3,270 $ 3,005
Other comprehensive income, before tax:      
Pension and other postretirement benefits 36 51 226
Other comprehensive income of equity investees 4 17 24
Other comprehensive income, before tax 40 68 250
Income tax benefit (expense) related to items of other comprehensive income (loss) (9) (17) (58)
Other comprehensive income, net of tax 31 51 192
Total comprehensive income $ 1,858 $ 3,321 $ 3,197