Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Expenses [Abstract]
Insurance Commissions	$ 94	$ 93
Communications and Information Technology	66	69
Lease And Loan Administration	32	29
Marketing and Advertising Expense	27	31
Professional Fees	24	20
Vehicle remarketing and repossession	24	18
Depreciation, Nonproduction	21	20
Regulatory and licensing fees	21	21
Occupancy, Net	13	12
Non-Income Taxes	9	8
Other Cost and Expense, Operating	54	63
Total other operating expenses	$ 385	$ 384