Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating Leases
2021	$ 1,946
2022	1,777
2023	1,586
2024	1,192
2025	812
2026 and thereafter	3,307
Total lease payments	10,620
Less: Imputed interest	(2,192)
Total operating lease liabilities	8,428	$ 9,129
Less: Current obligations	(1,651)	(1,708)
Long-term lease obligations	6,777	7,421
Finance Leases
2021	131
2022	136
2023	114
2024	120
2025	85
2026 and thereafter	89
Total lease payments	675
Less: Imputed interest	(103)
Total finance lease liabilities	572	670
Less: Current obligations	(100)	(112)
Long-term lease obligations	472	558
American Airlines, Inc.
Operating Leases
2021	1,932
2022	1,764
2023	1,575
2024	1,184
2025	808
2026 and thereafter	3,291
Total lease payments	10,554
Less: Imputed interest	(2,174)
Total operating lease liabilities	8,380	9,083
Less: Current obligations	(1,641)	(1,695)
Long-term lease obligations	6,739	7,388
Finance Leases
2021	131
2022	136
2023	114
2024	120
2025	85
2026 and thereafter	89
Total lease payments	675
Less: Imputed interest	(103)
Total finance lease liabilities	572	670
Less: Current obligations	(100)	(112)
Long-term lease obligations	$ 472	$ 558