Shareholders' Equity (Schedule Of Accumulated Other Comprehensive (Loss) Income) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Shareholders' Equity [Abstract]
Foreign currency translation		$ 216	$ 281
Net unrealized loss on hedges of net investments in non-U.S. subsidiaries	(14)	(14)	(14)
Net unrealized gain (loss) on available-for-sale securities portfolio	110	(90)	(1,001)
Net unrealized loss related to reclassified available-for-sale securities	(189)	(317)	(635)
Net unrealized gain (loss) on available-for-sale securities	(79)	(407)	(1,636)
Net unrealized loss on available-for-sale securities designated in fair value hedges	(210)	(135)	(113)
Expected losses from other-than-temporary impairment on available-for-sale securities related to factors other than credit	(17)	(17)	(159)
Expected losses from other-than-temporary impairment on held-to-maturity securities related to factors other than credit	(86)	(111)	(387)
Net unrealized loss on cash flow hedges	(5)	(11)	(18)
Minimum pension liability	(248)	(210)	(192)
Total	$ (659)	$ (689)	$ (2,238)