Restructuring and Other Items (Narrative) (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	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Deferred Gain on Sale of Property					$ 78
Restructuring, Settlement and Impairment Provisions	193	144	181	151
Gain on Divestiture of Slot Swaps [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, Settlement and Impairment Provisions	0	0	(39)	0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Restructuring Cost and Reserve [Line Items]
Defined Benefit Plan, Other Costs	$ 104	$ 0	$ 104	$ 0