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Restructuring - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Impact Of Global Pandemic [Line Items]      
Restructuring charges $ (19) $ 8,219 $ 0
Retired aircraft      
Impact Of Global Pandemic [Line Items]      
Cumulative net book value of retired aircraft $ 340 500  
Voluntary early retirement and separation programs      
Impact Of Global Pandemic [Line Items]      
Restructuring charges   3,400  
Voluntary early retirement and separation programs | Special termination benefits      
Impact Of Global Pandemic [Line Items]      
Special termination benefits   1,300  
Reserve against outstanding receivables from LATAM, Grupo Aeromexico, GOL, Virgin Atlantic and others      
Impact Of Global Pandemic [Line Items]      
Reserves against outstanding receivables   $ 100