Commitments, Contingencies and Guarantees - Additional Information (Detail) shares in Millions	1 Months Ended
	Jun. 30, 2015 Lawsuits	Dec. 31, 2017 USD ($) Employees Aircraft shares
Long-term Purchase Commitment [Line Items]
Number of aircraft owned through financing under EETC | Aircraft		387
Number of aircraft operating leased under trusts | Aircraft		113
Operating leases future minimum payments		$ 11,717,000,000
Letters of credit outstanding and surety bonds, amount		$ 448,000,000
Shares reserved for future issuance | shares		24.5
Number of putative class action lawsuits | Lawsuits	100
Number of full-time equivalent employees | Employees		126,600
Percentage of employees covered by collective bargaining agreements with various labor unions		85.00%
Regional Carrier [Member]
Long-term Purchase Commitment [Line Items]
Number of full-time equivalent employees | Employees		23,500
EETC Leveraged Lease Financings [Member]
Long-term Purchase Commitment [Line Items]
Operating leases future minimum payments		$ 572,000,000
Special Facility Revenue Bonds [Member]
Long-term Purchase Commitment [Line Items]
Operating leases future minimum payments		589,000,000
Enhanced Equipment Trust Certificates (EETC) [Member]
Long-term Purchase Commitment [Line Items]
EETC Carrying Value		11,900,000,000
Restricted Cash [Member]
Long-term Purchase Commitment [Line Items]
Letters of credit outstanding and surety bonds, amount		$ 88,000,000
American Airlines, Inc. [Member]
Long-term Purchase Commitment [Line Items]
Number of aircraft owned through financing under EETC | Aircraft		387
Number of aircraft operating leased under trusts | Aircraft		113
Operating leases future minimum payments		$ 11,659,000,000
Letters of credit outstanding and surety bonds, amount		$ 448,000,000
Number of putative class action lawsuits | Lawsuits	100
Number of full-time equivalent employees | Employees		103,100
Percentage of employees covered by collective bargaining agreements with various labor unions		84.00%
American Airlines, Inc. [Member] | EETC Leveraged Lease Financings [Member]
Long-term Purchase Commitment [Line Items]
Operating leases future minimum payments		$ 572,000,000
American Airlines, Inc. [Member] | Special Facility Revenue Bonds [Member]
Long-term Purchase Commitment [Line Items]
Operating leases future minimum payments		589,000,000
American Airlines, Inc. [Member] | Enhanced Equipment Trust Certificates (EETC) [Member]
Long-term Purchase Commitment [Line Items]
EETC Carrying Value		11,900,000,000
American Airlines, Inc. [Member] | Unsecured Debt [Member] | Senior Notes 6.125% Due in 2018 [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		500,000,000
American Airlines, Inc. [Member] | Unsecured Debt [Member] | Senior Notes 5.50% Due in 2019 [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		750,000,000
American Airlines, Inc. [Member] | Unsecured Debt [Member] | Senior Notes 4.625% Due in 2020 [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		500,000,000
American Airlines, Inc. [Member] | Restricted Cash [Member]
Long-term Purchase Commitment [Line Items]
Letters of credit outstanding and surety bonds, amount		$ 88,000,000