Stockholders' Equity - Schedule Of Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Stockholders' Equity Note [Abstract]
Net unrealized gains on cash flow hedges	$ 296	$ 276
Net unrealized gains (losses) on available-for-sale securities portfolio	139	273
Net unrealized gains (losses) related to reclassified available-for-sale securities	30	39
Net unrealized gains (losses) on available-for-sale securities	169	312
Net unrealized losses on available-for-sale securities designated in fair value hedges	(113)	(121)
Other-than-temporary impairment on available-for-sale securities related to factors other than credit	0	1
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	(22)	(29)
Net unrealized losses on retirement plans	(257)	(272)
Foreign currency translation	(1,070)	(660)
Total	$ (1,011)	$ (507)	$ 489	$ (95)