Commitments, Contingencies and Guarantees - Unrecorded Unconditional Purchase Obligations (Detail) $ in Millions	Dec. 31, 2016 USD ($)
Facility Construction or Improvement Contracts [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017	$ 182
2018	126
2019	13
Total	321
Facility Construction or Improvement Contracts [Member] | American Airlines, Inc. [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017	182
2018	126
2019	13
Total	321
Information Technology Contracts [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017	205
2018	168
2019	128
2020	47
2021	24
2022 and Thereafter	8
Total	580
Information Technology Contracts [Member] | American Airlines, Inc. [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017	205
2018	168
2019	128
2020	47
2021	24
2022 and Thereafter	8
Total	580
Capacity Purchase Arrangements [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017	1,710
2018	1,421
2019	1,283
2020	1,048
2021	855
2022 and Thereafter	2,738
Total	9,055
Capacity Purchase Arrangements [Member] | American Airlines, Inc. [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017	1,710
2018	1,421
2019	1,283
2020	1,048
2021	855
2022 and Thereafter	2,738
Total	$ 9,055