Financial Instruments And Risk Management (Effect Of Derivative Instruments On Statements Of Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative					$ (56)	[1]	$ 294	[1]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(1)	[1]	132	[1]	25	[1]	230	[1]
Amount of Gain (Loss) Recognized in Income, Ineffectiveness	$ (8)	[2]	$ 4	[2]	$ (5)	[2]	$ 7	[2]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income					Aircraft Fuel	[1]
Location Of Gain (Loss) Recognized in Income on Derivative	Aircraft Fuel	[2]			Aircraft Fuel	[2]

[1] Effective portion of gain (loss)

[2] Ineffective portion of gain (loss)