Debt - Collateral-Related Covenants (Details) - Secured Debt [Member]	12 Months Ended
	Dec. 31, 2018
2013 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	34.80%
2014 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	18.80%
April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	40.90%
December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	57.50%
American Airlines, Inc. [Member] | 2013 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	34.80%
American Airlines, Inc. [Member] | 2014 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	18.80%
American Airlines, Inc. [Member] | April 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	40.90%
American Airlines, Inc. [Member] | December 2016 Credit Facilities [Member]
Debt Instrument [Line Items]
LTV Multiplier	1.6
Maximum LTV	62.50%
LTV as of Last Measurement Date	57.50%