Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) aircraft	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Number of leased aircraft | aircraft	722
Operating lease cost	$ 2,007	$ 2,012	$ 1,957
Operating lease, impairment loss			109
Operating lease commitments that have not yet commenced	$ 1,100
Operating lease commitments that have not yet commenced, number of aircraft | aircraft	9
Operating lease commitments that have not yet commenced, lease term	10 years
Republic Holdings
Lessee, Lease, Description [Line Items]
Ownership Interest	25.00%
Republic Holdings
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 242	190	172
American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Number of leased aircraft | aircraft	722
Operating lease cost	$ 1,987	1,998	1,943
Operating lease, impairment loss			109
Operating lease commitments that have not yet commenced	$ 1,100
Operating lease commitments that have not yet commenced, number of aircraft | aircraft	9
Operating lease commitments that have not yet commenced, lease term	10 years
American Airlines, Inc. | Republic Holdings
Lessee, Lease, Description [Line Items]
Ownership Interest	25.00%
American Airlines, Inc. | Republic Holdings
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 242	$ 190	$ 172
Minimum
Lessee, Lease, Description [Line Items]
Lease terms	1 year
Minimum | American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease terms	11 years
Maximum | American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Lease terms	11 years