Supplemental Financial Information - Other Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Other Assets [Abstract]
Asset derivative contracts, net	$ 86		$ 145
Intangible assets	366	[1]	166	[1]
Non-current investments	36		44
Other	131		175
Other assets	619		530
Accrued Liabilities | Fuel derivatives
Other Assets [Abstract]
Asset derivative contracts, net	0	[2]	0	[2]
Other Assets | Fuel derivatives
Other Assets [Abstract]
Asset derivative contracts, net	72	[2]	125	[2]
Other Assets | Interest rate derivatives
Other Assets [Abstract]
Asset derivative contracts, net	$ 14	[2]	$ 20	[2]

[1] Intangible assets primarily consist of acquired leasehold rights to certain airport owned gates at Chicago’s Midway International Airport, take-off and landing slots (a “slot” is the right of an air carrier, pursuant to regulations of the Federal Aviation Administration (“FAA”), to operate a takeoff or landing at a specific time at certain airports) at certain domestic slot-controlled airports, and certain intangible assets recognized from the AirTran acquisition. The increase in Intangible assets during 2014 was primarily due to the acquisition of additional slots at Washington Reagan National Airport, which were divested by AMR Corporation, the parent company of American Airlines, Inc., in connection with the merger with US Airways Group, Inc. The slots acquired are not subject to amortization due to the ability to renew the slots on an unlimited basis, the expectation that the slots will contribute positive cash flows for an indefinite period of time, and the Company's recent significant growth in certain slot-controlled airports. The purchase price paid for these slots was included as a component of Capital expenditures in the accompanying unaudited Condensed Consolidated Statement of Cash Flows.

[2] The net amounts of derivative assets and liabilities are reconciled to the individual line item amounts presented in the unaudited Condensed Consolidated Balance Sheet in Note 5.