CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Tax expense (benefit) of unrealized gains/losses on cash flow hedges	$ (15)	$ (92)	$ (41)	$ (125)
Tax expense (benefit) on cash flow hedges reclassified from AOCI to net income	7	10	18	18
Tax expense (benefit) of unrealized gains/losses on available for sale securities still held	18	(27)	44	(12)
Tax expense (benefit) on available for sale securities reclassified from AOCI to net income	(18)	(17)	(43)	(32)
Tax expense (benefit) of defined benefit pension and other benefits plans	0		(3)	4
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	2	(10)	3	(4)
Other comprehensive income (loss) related to equity method investee, tax	$ (3)		$ (7)