Merger and Related Matters - Schedule of Allocation of Consideration Transferred (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 09, 2013
Business Acquisition [Line Items]
Goodwill	$ 4,091	$ 4,091
American Airlines, Inc. [Member]
Business Acquisition [Line Items]
Goodwill	$ 4,091	$ 4,091
US Airways Group [Member]
Business Acquisition [Line Items]
Cash			$ 206
Short-term investments			3,517
Other current assets			1,459
Operating property and equipment			5,536
Goodwill			4,091
Identifiable intangibles			1,501
Other noncurrent assets			123
Long-term debt and capital leases, including current portion			(6,026)
Air traffic liability			(1,417)
Loyalty program liability			(1,256)
Other liabilities assumed			(3,142)
Total purchase price			4,592
US Airways Group [Member] | American Airlines, Inc. [Member]
Business Acquisition [Line Items]
Cash			200
Short-term investments			3,517
Other current assets			1,417
Operating property and equipment			5,383
Goodwill			4,091
Identifiable intangibles			1,501
Other noncurrent assets			125
Long-term debt and capital leases, including current portion			(5,481)
Air traffic liability			(1,417)
Loyalty program liability			(1,256)
Other liabilities assumed			(2,649)
Total purchase price			$ 5,431