Shareholders' Equity (Schedule Of Accumulated Other Comprehensive (Loss) Income) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stockholders' Equity Note [Abstract]
Foreign currency translation	$ 134	$ 0	$ 216
Net unrealized losses on hedges of net investments in non-U.S. subsidiaries	(14)	(14)	(14)
Net unrealized gains (losses) on available-for-sale securities portfolio	815	110	(90)
Net unrealized losses related to reclassified available-for-sale securities	(110)	(189)	(317)
Net unrealized gains (losses) on available-for-sale securities	705	(79)	(407)
Net unrealized losses on available-for-sale securities designated in fair value hedges	(183)	(210)	(135)
Other-than-temporary impairment on available-for-sale securities related to factors other than credit	(3)	(17)	(17)
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit	(65)	(86)	(111)
Net unrealized losses on cash flow hedges	69	(5)	(11)
Minimum pension liability	(283)	(248)	(210)
Total	$ 360	$ (659)	$ (689)