Shareholders' Equity (Schedule Of Accumulated Other Comprehensive (Loss) Income) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Stockholders' Equity Note [Abstract]
Foreign currency translation	$ 146
Net unrealized loss on hedges of net investments in non-U.S. subsidiaries	(14)		(14)
Net unrealized gain (loss) on available-for-sale securities portfolio	260		110
Net unrealized loss related to reclassified available-for-sale securities	(167)		(189)
Net unrealized gain (loss) on available-for-sale securities	93		(79)
Net unrealized loss on available-for-sale securities designated in fair value hedges	(178)		(210)
Expected losses from other-than-temporary impairment on available-for-sale securities related to factors other than credit	(13)		(17)
Expected losses from other-than-temporary impairment on held-to-maturity securities related to factors other than credit	(83)		(86)
Net unrealized loss on cash flow hedges	(4)		(5)
Minimum pension liability	(246)		(248)
Total	$ (299)	$ (659)	$ (659)