Shareholders' Equity (Schedule Of Accumulated Other Comprehensive (Loss) Income) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Stockholders' Equity Note [Abstract]
Net unrealized gains on cash flow hedges	$ 130	$ 69
Net unrealized gains on available-for-sale securities portfolio	138	815
Net unrealized losses related to reclassified available-for-sale securities	(81)	(110)
Net unrealized gains on available-for-sale securities	57	705
Net unrealized losses on available-for-sale securities designated in fair value hedges	(122)	(183)
Other-than-temporary impairment on available-for-sale securities related to factors other than credit	3	(3)
Net unrealized losses on hedges of net investments in non-U.S. subsidiaries	(14)	(14)
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit	(51)	(65)
Net unrealized losses on retirement plans	(274)	(283)
Foreign currency translation	157	134
Total	$ (114)	$ 360