Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2014 AA [Member]	Jun. 30, 2013 AA [Member]	Jun. 30, 2013 AA [Member]	Jun. 30, 2014 Fuel Hedging Contract [Member]	Dec. 31, 2013 Fuel Hedging Contract [Member]	Jun. 30, 2014 Fuel Hedging Contract [Member] AA [Member]	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Maximum [Member] AA [Member]
Derivative [Line Items]
Proceeds from sale of derivative instrument							$ 71,000,000		$ 71,000,000
Gain on sale of fuel hedging contracts							25,000,000		25,000,000
Amount of gain (loss) recognized in condensed consolidated statements of operations	2,000,000	(31,000,000)	(23,000,000)	2,000,000	(31,000,000)	(23,000,000)				1,000,000	1,000,000
Fuel derivatives, gross asset								$ 109,000,000