Commitments, Contingencies and Guarantees - Other Purchase Commitments (Details) - Jet Fuel, Facility Construction Projects and Information Technology Support [Member] $ in Millions |
Dec. 31, 2017
USD ($)
|
---|---|
Unrecorded Unconditional Purchase Obligation [Line Items] | |
Purchase commitments, 2018 | $ 2,000 |
Purchase commitments, 2019 | 1,400 |
Purchase commitments, 2020 | 890 |
Purchase commitments, 2021 | 950 |
American Airlines, Inc. [Member] | |
Unrecorded Unconditional Purchase Obligation [Line Items] | |
Purchase commitments, 2018 | 2,000 |
Purchase commitments, 2019 | 1,400 |
Purchase commitments, 2020 | 890 |
Purchase commitments, 2021 | $ 950 |