Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Operating leases:
Operating lease ROU assets	$ 7,333	$ 7,939
Current operating lease liabilities	1,092	1,309
Noncurrent operating lease liabilities	5,976	6,452
Total operating lease liabilities	7,068	7,761
Finance leases:
Property and equipment, at cost	1,632	1,380
Accumulated amortization	(952)	(891)
Property and equipment, net	680	489
Current finance lease liabilities	132	131
Noncurrent finance lease liabilities	531	375
Total finance lease liabilities	$ 663	$ 506
Weighted average remaining lease term:
Operating leases	8 years 2 months 12 days	8 years 4 months 24 days
Finance leases	7 years 4 months 24 days	5 years 9 months 18 days
Weighted average discount rate:
Operating leases	7.50%	7.60%
Finance leases	7.00%	7.20%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt and finance leases	Current maturities of long-term debt and finance leases
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Debt and Lease Obligation	Long-Term Debt and Lease Obligation
American Airlines, Inc.
Operating leases:
Operating lease ROU assets	$ 7,274	$ 7,886
Current operating lease liabilities	1,082	1,292
Noncurrent operating lease liabilities	5,926	6,416
Total operating lease liabilities	7,008	7,708
Finance leases:
Property and equipment, at cost	1,604	1,352
Accumulated amortization	(924)	(870)
Property and equipment, net	680	482
Current finance lease liabilities	132	124
Noncurrent finance lease liabilities	531	374
Total finance lease liabilities	$ 663	$ 498
Weighted average remaining lease term:
Operating leases	8 years 2 months 12 days	8 years 4 months 24 days
Finance leases	7 years 4 months 24 days	5 years 9 months 18 days
Weighted average discount rate:
Operating leases	7.50%	7.60%
Finance leases	7.00%	7.10%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt and finance leases	Current maturities of long-term debt and finance leases
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Debt and Lease Obligation	Long-Term Debt and Lease Obligation