Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating leases:
Operating lease ROU assets	$ 7,850	$ 8,039
Current operating lease liabilities	1,507	1,651
Noncurrent operating lease liabilities	6,610	6,777
Total operating lease liabilities	8,117	8,428
Finance leases:
Property and equipment, at cost	1,201	1,021
Accumulated amortization	(653)	(539)
Property and equipment, net	548	482
Current finance lease liabilities	174	100
Noncurrent finance lease liabilities	563	472
Total finance lease liabilities	$ 737	$ 572
Weighted average remaining lease term:
Operating leases	7 years 7 months 6 days	7 years 4 months 24 days
Finance leases	4 years 7 months 6 days	5 years 4 months 24 days
Weighted average discount rate:
Operating leases	6.30%	5.60%
Finance leases	6.10%	6.30%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Total property and equipment, net	Total property and equipment, net
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	$ 7,810	$ 7,994
Current operating lease liabilities	1,496	1,641
Noncurrent operating lease liabilities	6,578	6,739
Total operating lease liabilities	8,074	8,380
Finance leases:
Property and equipment, at cost	1,201	1,021
Accumulated amortization	(653)	(539)
Property and equipment, net	548	482
Current finance lease liabilities	174	100
Noncurrent finance lease liabilities	563	472
Total finance lease liabilities	$ 737	$ 572
Weighted average remaining lease term:
Operating leases	7 years 7 months 6 days	7 years 4 months 24 days
Finance leases	4 years 7 months 6 days	5 years 4 months 24 days
Weighted average discount rate:
Operating leases	6.20%	5.60%
Finance leases	6.10%	6.30%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Total property and equipment, net	Total property and equipment, net
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