Derivative And Financial Instruments (Effect Of Derivative Instruments On Statements Of Operations) (Details) (USD $) In Millions	3 Months Ended						6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2009		Jun. 30, 2011		Jun. 30, 2010
Derivative And Financial Instruments
Amount of Gain (Loss) Recognized in OCI on Derivative							$ 294	[1]	$ (123)	[1]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	132	[1]	(52)	[1]			230	[1]	(103)	[1]
Amount of Gain (Loss) Recognized in Income on Derivative	$ 4	[2]			$ (12)	[2]	$ 7	[2]	$ (11)	[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]

[1] Effective portion of gain (loss)

[2] Ineffective portion of gain (loss)