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Commitments, Contingencies and Guarantees - Capacity Purchase Agreements (Details) - American Airlines, Inc. [Member] - Airline Capacity Purchase Arrangements [Member]
$ in Millions
Dec. 31, 2019
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
Capacity purchase agreement, percentage of reimbursement for certain variable costs 100.00%
2020 $ 1,115
2021 1,185
2022 1,126
2023 1,077
2024 1,077
2025 and Thereafter 3,402
Total $ 8,982