Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating Expenses [Abstract]
Insurance Commissions	$ 95	$ 93	$ 279	$ 278
Communications and Information Technology	77	87	255	250
Lease And Loan Administration	32	29	92	141
Marketing and Advertising Expense	27	33	81	96
Professional Fees	20	38	73	140
Regulatory and licensing fees	23	25	69	87
Depreciation, Nonproduction	23	20	61	61
Vehicle remarketing and repossession	22	15	61	42
Occupancy, Net	12	12	34	34
State And Local Non-Income Taxes Amount	12	1	32	17
Mortgage Representation And Warranty, Net	0	22	1	103
Other Cost and Expense, Operating	61	57	175	144
Total other operating expenses	$ 404	$ 432	$ 1,213	$ 1,393