Basis of Presentation and Summary of Significant Accounting Policies - Definite-Lived Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (827)	$ (786)
Total	115	156
American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	(827)	(786)
Total	115	156
Domestic airport slots
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	365	365
Domestic airport slots | American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	365	365
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	300	300
Customer relationships | American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	300	300
Marketing agreements
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 105	105
Useful life of intangible assets	30 years
Marketing agreements | American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 105	105
Useful life of intangible assets	30 years
Tradenames
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 35	35
Tradenames | American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	35	35
Airport gate leasehold rights
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	137	137
Airport gate leasehold rights | American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross	$ 137	$ 137
Domestic Airport Slots and Airport Gate Leasehold Rights
Finite-Lived Intangible Assets [Line Items]
Useful life of intangible assets	25 years
Domestic Airport Slots and Airport Gate Leasehold Rights | American Airlines, Inc.
Finite-Lived Intangible Assets [Line Items]
Useful life of intangible assets	25 years