Debt - 2017-2 EETCs - Certain Information (Details) - Enhanced Equipment Trust Certificates (EETC) [Member]	Dec. 31, 2018 USD ($)
2017-2 EETC - Series AA [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 545,000,000
Fixed interest rate	3.35%
2017-2 EETC - Series A [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 252,000,000
Fixed interest rate	3.60%
2017-2 EETC - Series B [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 221,000,000
Fixed interest rate	3.70%
American Airlines, Inc. [Member] | 2017-2 EETC - Series AA [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 545,000,000
Fixed interest rate	3.35%
American Airlines, Inc. [Member] | 2017-2 EETC - Series A [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 252,000,000
Fixed interest rate	3.60%
American Airlines, Inc. [Member] | 2017-2 EETC - Series B [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal issued	$ 221,000,000
Fixed interest rate	3.70%