Commitments, Contingencies and Guarantees - Aircraft, Engine and Other Purchase Commitments (Details) $ in Millions	Dec. 31, 2020 USD ($) aircraft	Dec. 31, 2019 USD ($)
Purchase Obligations
Equipment purchase deposits	$ 1,446	$ 1,674
Boeing 737 Max
Purchase Obligations
Number of aircraft delivered \| aircraft	10
Number of aircrafts, deferrable, scheduled to be delivered in period one \| aircraft	1
Number of aircrafts, deferrable, scheduled to be delivered period two \| aircraft	10
B-787-8
Purchase Obligations
Number of aircraft ordered, not delivered, to be financed under sale-leaseback financing \| aircraft	19
Jet Fuel, Facility Construction Projects and Information Technology Support
Unrecorded Unconditional Purchase Obligations
2021	$ 2,300
2022	1,300
2023	1,200
2024	242
2025	163
Aircraft and Engine Purchase Commitments
Purchase Obligations
2021	527
2022	1,661
2023	1,592
2024	2,377
2025	3,381
2026 and Thereafter	1,742
Total	11,280
American Airlines, Inc.
Purchase Obligations
Equipment purchase deposits	$ 1,446	$ 1,674
American Airlines, Inc. \| Boeing 737 Max
Purchase Obligations
Number of aircraft delivered \| aircraft	10
Number of aircrafts, deferrable, scheduled to be delivered in period one \| aircraft	1
Number of aircrafts, deferrable, scheduled to be delivered period two \| aircraft	10
American Airlines, Inc. \| B-787-8
Purchase Obligations
Number of aircraft ordered, not delivered, to be financed under sale-leaseback financing \| aircraft	19
American Airlines, Inc. \| Jet Fuel, Facility Construction Projects and Information Technology Support
Unrecorded Unconditional Purchase Obligations
2021	$ 2,300
2022	1,300
2023	1,200
2024	242
2025	163
2026 and thereafter	1,000
American Airlines, Inc. \| Aircraft and Engine Purchase Commitments
Purchase Obligations
2021	527
2022	1,661
2023	1,592
2024	2,377
2025	3,381
2026 and Thereafter	1,742
Total	$ 11,280

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Carrying amount, at the balance sheet date, of deposits made to the manufacturer for new flight equipment still under construction. May include capitalized interest.

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