Debt - Components of Long-Term Debt - 2013 Credit Facilities (Details) - Secured Debt [Member] - 2013 Credit Facilities [Member] - Term Loan Facility [Member] - USD ($) $ in Billions		1 Months Ended
	Apr. 30, 2018	May 31, 2018
Debt Instrument [Line Items]
Long-term debt outstanding		$ 1.8
LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%	1.75%
Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%	0.75%
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 1.8
American Airlines, Inc. [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%	1.75%
American Airlines, Inc. [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%	0.75%