Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Tax Credit Carryforward [Line Items]
Income tax provision	$ 115	$ 402	$ 404	$ 1,122
Income tax special items, net	0	0	40	0
Alternative Minimum Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Change in deferred tax assets valuation allowance			22
Alternative Minimum Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Alternative minimum tax credit carryforwards					$ 339
Federal [Member]
Tax Credit Carryforward [Line Items]
Gross NOL Carryforwards					10,000
State [Member]
Tax Credit Carryforward [Line Items]
Gross NOL Carryforwards					3,400
Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Income tax special items, net			18
American Airlines, Inc. [Member]
Tax Credit Carryforward [Line Items]
Income tax provision	133	417	467	1,170
Income tax special items, net	$ 0	$ 0	48	$ 0
American Airlines, Inc. [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Change in deferred tax assets valuation allowance			30
American Airlines, Inc. [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Alternative minimum tax credit carryforwards					452
American Airlines, Inc. [Member] | Federal [Member]
Tax Credit Carryforward [Line Items]
Gross NOL Carryforwards					10,600
American Airlines, Inc. [Member] | State [Member]
Tax Credit Carryforward [Line Items]
Gross NOL Carryforwards					$ 3,200
American Airlines, Inc. [Member] | Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Income tax special items, net			$ 18