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Consolidated Condensed Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Statement of Comprehensive Income [Abstract]        
Gains on derivatives, tax expense $ 0 $ 10 $ 0 $ 18
Pension and postretirement gains, tax benefit (expense) $ 1 $ (3) $ 2 $ (3)