Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accumulated amortization of intangibles	$ 622	$ 578
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,750,000,000	1,750,000,000
Common stock, shares issued	475,507,887	507,294,153
Common stock, shares outstanding	475,507,887	507,294,153
American Airlines, Inc. [Member]
Accumulated amortization of intangibles	$ 622	$ 578
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000