Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) aircraft	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Lease cost | $	$ 5,275	$ 5,097	$ 4,909
Leased Aircrafts
Lessee, Lease, Description [Line Items]
Number of operated aircrafts | aircraft	677
Aircrafts Leased Under Capacity Purchase Agreements
Lessee, Lease, Description [Line Items]
Number of operated aircrafts | aircraft	171
Republic Holdings
Lessee, Lease, Description [Line Items]
Ownership Interest	20.80%
Republic Holdings
Lessee, Lease, Description [Line Items]
Lease cost | $	$ 248	225	274
American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Lease cost | $	$ 5,236	5,051	4,858
American Airlines, Inc. | Leased Aircrafts
Lessee, Lease, Description [Line Items]
Number of operated aircrafts | aircraft	677
American Airlines, Inc. | Aircrafts Leased Under Capacity Purchase Agreements
Lessee, Lease, Description [Line Items]
Number of operated aircrafts | aircraft	171
American Airlines, Inc. | Republic Holdings
Lessee, Lease, Description [Line Items]
Ownership Interest	20.80%
American Airlines, Inc. | Republic Holdings
Lessee, Lease, Description [Line Items]
Lease cost | $	$ 248	$ 225	$ 274
Minimum
Lessee, Lease, Description [Line Items]
Lease terms (in years)	1 year
Minimum | American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Lease terms (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease terms (in years)	13 years
Maximum | American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Lease terms (in years)	13 years