Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Income tax provision (benefit)	$ 380	$ 452	$ 998	$ 1,412
Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Alternative minimum tax credit carryforwards					$ 339
Federal [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards					10,500
State [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards					3,700
American Airlines, Inc. [Member]
Income Taxes [Line Items]
Income tax provision (benefit)	$ 395	$ 465	$ 1,046	$ 1,445
American Airlines, Inc. [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Income Taxes [Line Items]
Alternative minimum tax credit carryforwards					452
American Airlines, Inc. [Member] | Federal [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards					11,300
American Airlines, Inc. [Member] | State [Member]
Income Taxes [Line Items]
Gross NOL Carryforwards					$ 3,400