Other Income, Net Of Losses (Other Income, Net Of Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Nonoperating Income (Expense) [Abstract]
Fees and Commissions, Other	$ 23	$ 21	$ 46	$ 42
Remarketing Fees	19	15	39	32
Unrealized Gain (Loss) on Derivatives	10	(46)	10	(34)
Fees and Commissions, Mortgage Banking	2	108	81	230
Other Nonoperating Income	20	46	55	84
Other Income	$ 74	$ 144	$ 231	$ 354