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GOVERNMENT GRANTS AND RESTRUCTURING - Restructuring Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
employee
Restructuring Cost and Reserve [Line Items]      
Grant payments received through payroll support program $ 4,500 $ 3,900  
Asset impairment charges     $ 4,400
Restructuring charges (124) (19) $ 8,219
Number of employees participating | employee     18,000
Retired aircraft      
Restructuring Cost and Reserve [Line Items]      
Cumulative net book value of retired aircraft 220 340  
Voluntary early retirement and separation programs      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges   3,400  
Voluntary early retirement and separation programs | Special termination benefits      
Restructuring Cost and Reserve [Line Items]      
Special termination benefits   1,300  
Voluntary early retirement and separation programs | Separation payments and healthcare benefits      
Restructuring Cost and Reserve [Line Items]      
Cash payments disbursed to participants 440 575 $ 720
Voluntary early retirement and separation programs | Unpaid vacation and other benefits      
Restructuring Cost and Reserve [Line Items]      
Cash payments disbursed to participants   $ 250  
Reserve against outstanding receivables from LATAM, Grupo Aeromexico, GOL, Virgin Atlantic and others      
Restructuring Cost and Reserve [Line Items]      
Reserves against outstanding receivables $ 7   $ 100