Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating Expenses [Abstract]
Insurance Commissions	$ 93	$ 93	$ 183	$ 185
Communications and Information Technology	93	92	178	163
Lease And Loan Administration	32	31	60	112
Marketing and Advertising Expense	25	28	54	63
Professional Fees	25	54	53	102
Vehicle remarketing and repossession	21	13	39	27
Depreciation, Nonproduction	19	21	38	41
Regulatory and licensing fees	19	29	46	62
Occupancy, Net	12	11	23	22
State And Local Non-Income Taxes Amount	10	6	20	16
Mortgage Representation And Warranty, Net	0	(2)	1	81
Other Cost and Expense, Operating	69	27	114	87
Total other operating expenses	$ 418	$ 403	$ 809	$ 961