Emergence from Chapter 11 and Merger with US Airways Group - Additional Information (Detail) $ / shares in Units, $ in Millions				3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 14, 2015 USD ($) shares	Feb. 10, 2015 USD ($) shares	Dec. 09, 2013 USD ($) $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Sep. 30, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares
Bankruptcy [Line Items]
Common stock, par value | $ / shares				$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized				1,750,000,000	1,750,000,000	1,750,000,000
Common stock, shares issued				640,107,543	640,107,543	697,474,535
Single-Dip General Unsecured Claims | $			$ 2,500	$ 135	$ 135	$ 248
Double-Dip General Unsecured Claims | $			$ 2,500
Shares released from restriction and issued	600,000	800,000
Merger common stock conversion ratio			1
Federal NOL carryforwards, maximum allowable utilization | $			$ 9,000
Series A Convertible Preferred Stock [Member]
Bankruptcy [Line Items]
Preferred stock, shares issued			168,000,000
Preferred stock, par or stated value per share | $ / shares			$ 0.01
American Airlines, Inc. [Member]
Bankruptcy [Line Items]
Common stock, par value | $ / shares			$ 0.01	$ 1.00	$ 1.00	$ 1.00
Common stock, shares authorized				1,000	1,000	1,000
Common stock, shares issued			53,000,000	1,000	1,000	1,000
Single-Dip General Unsecured Claims | $			$ 2,500	$ 135	$ 135	$ 248
Double-Dip General Unsecured Claims | $			2,500
Shares released from restriction and issued	600,000	800,000
Federal NOL carryforwards, maximum allowable utilization | $			$ 9,500
American Airlines, Inc. [Member] | Series A Convertible Preferred Stock [Member]
Bankruptcy [Line Items]
Preferred stock, shares issued			168,000,000
Preferred stock, par or stated value per share | $ / shares			$ 0.01
American Airlines, Inc. [Member] | Maximum [Member]
Bankruptcy [Line Items]
Common stock, shares authorized			544,000,000
Common Stock [Member]
Bankruptcy [Line Items]
Shares reserved for future issuance			30,400,000	25,300,000	25,300,000	26,800,000
Shares released from restriction and issued	600,000	800,000
Stock repurchased (in shares)	100,000	100,000		38,400,000	59,500,000
Aggregate stock repurchase price | $	$ 2	$ 4		$ 1,600	$ 2,500
Common Stock [Member] | American Airlines, Inc. [Member]
Bankruptcy [Line Items]
Shares reserved for future issuance			30,400,000	25,300,000	25,300,000	26,800,000
Shares released from restriction and issued	600,000	800,000
Stock repurchased (in shares)	100,000	100,000
Aggregate stock repurchase price | $	$ 2	$ 4
American Airlines Group [Member]
Bankruptcy [Line Items]
Common stock, par value | $ / shares			$ 0.01
Common stock, shares authorized				544,000,000	544,000,000
Common stock, shares issued			53,000,000
Distributions made to holders			0.0665			0.6776
Percentage of common stock to holders of US Airways Group equity instruments				28.00%	28.00%
Percentage of common stock to AMR claimholders and certain employees				72.00%	72.00%
American Airlines Group [Member] | Maximum [Member]
Bankruptcy [Line Items]
Common stock, shares authorized			544,000,000
American Airlines Group [Member] | American Airlines, Inc. [Member]
Bankruptcy [Line Items]
Distributions made to holders			0.0665			0.6776