Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating Expenses [Abstract]
Insurance Commissions	$ 93	$ 90
Communications and Information Technology	69	85
Marketing and Advertising Expense	31	29
Lease And Loan Administration	29	28
Regulatory and licensing fees	21	27
Professional Fees	20	28
Depreciation, Nonproduction	20	19
Vehicle remarketing and repossession	18	18
Occupancy, Net	12	11
Non-Income Taxes	8	10
Other Cost and Expense, Operating	63	46
Total other operating expenses	$ 384	$ 391