Debt - Components of Long-Term Debt - Other Equipment Notes Issued in 2019 (Details) - Secured Debt [Member] - Equipment Loans and Other Notes Payable [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Proceeds from notes payable	$ 400
Average interest rate	4.27%
American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Proceeds from notes payable	$ 400
Average interest rate	4.27%
LIBOR [Member]
Debt Instrument [Line Items]
Average interest rate	4.07%
LIBOR [Member] | American Airlines, Inc. [Member]
Debt Instrument [Line Items]
Average interest rate	4.07%