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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Statement of Comprehensive Income [Abstract]    
Unrealized losses from cash flow hedges net of adjustment for de-designation of fuel hedges, tax benefit/(expense) $ (1) $ 2