Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating Expenses [Abstract]
Insurance Commissions	$ 93	$ 93	$ 278	$ 286
Communications and Information Technology	87	68	250	237
Professional Fees	38	43	140	113
Marketing and Advertising Expense	33	37	96	104
Lease And Loan Administration	29	89	141	200
Regulatory and licensing fees	25	30	87	94
Mortgage Representation And Warranty, Net	22	30	103	171
Depreciation, Nonproduction	20	20	61	56
Vehicle remarketing and repossession	15	11	42	39
Occupancy, Net	12	12	34	38
Other Cost and Expense, Operating	58	65	161	166
Total other operating expenses	$ 432	$ 498	$ 1,393	$ 1,504