Other Operating Expenses (Details Of Other Operating Expenses) (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 Cost and Expense Disclosure, Operating [Abstract]
Insurance Commissions	$ 93	$ 94	$ 185	$ 193
Communications and Information Technology	92	80	163	169
Professional Fees	54	32	102	70
Lease And Loan Administration	31	57	112	111
Regulatory and licensing fees	29	31	62	64
Marketing and Advertising Expense	28	32	63	67
Depreciation, Nonproduction	21	19	41	36
Vehicle remarketing and repossession	13	12	27	28
Occupancy, Net	11	12	22	26
Mortgage Representation And Warranty, Net	(2)	141	81	141
Other Cost and Expense, Operating	33	42	103	101
Total other operating expenses	$ 403	$ 552	$ 961	$ 1,006