Special Charges And Restructuring Activities (Components Of Company's Special Charges) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Restructuring Cost and Reserve [Line Items]
Remaining accrual, beginning	$ 86	$ 175	$ 142
Capacity reduction charges			171
Non-cash charges	(724)		(68)
Adjustments	743	3	(2)
Payments	(40)	(92)	(68)
Remaining accrual, ending	65	86	175
Aircraft Charges [Member]
Restructuring Cost and Reserve [Line Items]
Remaining accrual, beginning	59	155	110
Capacity reduction charges			164
Non-cash charges	(725)		(68)
Adjustments	751	(8)	(2)
Payments	(36)	(88)	(49)
Remaining accrual, ending	49	59	155
Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Remaining accrual, beginning	27	20	16
Capacity reduction charges			7
Non-cash charges	1
Adjustments	(8)	11
Payments	(4)	(4)	(3)
Remaining accrual, ending	16	27	20
Employee Charges [Member]
Restructuring Cost and Reserve [Line Items]
Remaining accrual, beginning			16
Payments			$ (16)