Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Tax Credit Carryforward [Line Items]
Income tax provision	$ 60	$ 79
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	10,200
State [Member]
Tax Credit Carryforward [Line Items]
Gross NOL Carryforwards	3,200
American Airlines, Inc. [Member]
Tax Credit Carryforward [Line Items]
Income tax provision	74	$ 105
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	$ 3,100