Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Operating leases:
Operating lease ROU assets	$ 7,091	$ 7,333
Current operating lease liabilities	1,058	1,092
Noncurrent operating lease liabilities	5,905	5,976
Total operating lease liabilities	6,963	7,068
Finance leases:
Property and equipment, at cost	1,445	1,632
Accumulated amortization	(673)	(952)
Property and equipment, net	772	680
Current finance lease liabilities	117	132
Noncurrent finance lease liabilities	610	531
Total finance lease liabilities	$ 727	$ 663
Weighted average remaining lease term (in years):
Operating leases	8 years 4 months 24 days	8 years 2 months 12 days
Finance leases	7 years 9 months 18 days	7 years 4 months 24 days
Weighted average discount rate:
Operating leases	7.40%	7.50%
Finance leases	7.10%	7.00%
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	$ 7,038	$ 7,274
Current operating lease liabilities	1,048	1,082
Noncurrent operating lease liabilities	5,860	5,926
Total operating lease liabilities	6,908	7,008
Finance leases:
Property and equipment, at cost	1,412	1,604
Accumulated amortization	(640)	(924)
Property and equipment, net	772	680
Current finance lease liabilities	114	132
Noncurrent finance lease liabilities	610	531
Total finance lease liabilities	$ 724	$ 663
Weighted average remaining lease term (in years):
Operating leases	8 years 4 months 24 days	8 years 2 months 12 days
Finance leases	7 years 9 months 18 days	7 years 4 months 24 days
Weighted average discount rate:
Operating leases	7.30%	7.50%
Finance leases	7.10%	7.00%
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