Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating leases:
Operating lease ROU assets	$ 7,939	$ 8,094
Current operating lease liabilities	1,309	1,465
Noncurrent operating lease liabilities	6,452	6,559
Total operating lease liabilities	7,761	8,024
Finance leases:
Property and equipment, at cost	1,380	1,364
Accumulated amortization	(891)	(779)
Property and equipment, net	489	585
Current finance lease liabilities	131	216
Noncurrent finance lease liabilities	375	545
Total finance lease liabilities	$ 506	$ 761
Weighted average remaining lease term:
Operating leases	8 years 4 months 24 days	8 years 3 months 18 days
Finance leases	5 years 9 months 18 days	5 years 1 month 6 days
Weighted average discount rate:
Operating leases	7.60%	7.40%
Finance leases	7.20%	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	$ 7,886	$ 8,033
Current operating lease liabilities	1,292	1,449
Noncurrent operating lease liabilities	6,416	6,512
Total operating lease liabilities	7,708	7,961
Finance leases:
Property and equipment, at cost	1,352	1,336
Accumulated amortization	(870)	(767)
Property and equipment, net	482	569
Current finance lease liabilities	124	209
Noncurrent finance lease liabilities	374	535
Total finance lease liabilities	$ 498	$ 744
Weighted average remaining lease term:
Operating leases	8 years 4 months 24 days	8 years 3 months 18 days
Finance leases	5 years 9 months 18 days	5 years
Weighted average discount rate:
Operating leases	7.60%	7.40%
Finance leases	7.10%	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