Employee Benefit Plans - Schedule of Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 3,613	$ 5,252
Prior service cost (benefit)	18	47
Total accumulated other comprehensive loss (income), pre-tax	3,631	5,299
Retiree Medical and  Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(505)	(396)
Prior service cost (benefit)	(148)	(167)
Total accumulated other comprehensive loss (income), pre-tax	(653)	(563)
American Airlines, Inc. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	3,609	5,241
Prior service cost (benefit)	18	46
Total accumulated other comprehensive loss (income), pre-tax	3,627	5,287
American Airlines, Inc. | Retiree Medical and  Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(505)	(396)
Prior service cost (benefit)	(148)	(167)
Total accumulated other comprehensive loss (income), pre-tax	$ (653)	$ (563)