CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Income (Loss) Attributable to Parent	$ 1,911	$ 1,923	$ 1,957
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(106)	(265)	(5)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	44	37	(38)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	70	19	60
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	(77)	(49)	(21)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(28)	(45)	2
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	7	(5)	(1)
Other comprehensive income (loss) related to equity method investee, net of tax	(11)	(12)	0
Other Comprehensive Income (Loss), Net of Tax	(101)	(320)	(3)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 1,810	$ 1,603	$ 1,954