Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Expenses [Abstract]
Insurance Commissions	$ 95	$ 93	$ 188	$ 183
Communications and Information Technology	64	93	133	178
Lease And Loan Administration	32	32	61	60
Marketing and Advertising Expense	23	25	54	54
Professional Fees	25	25	45	53
Depreciation, Nonproduction	22	19	42	38
Regulatory and licensing fees	20	19	41	46
Vehicle remarketing and repossession	18	21	37	39
Occupancy, Net	13	12	24	23
Non-Income Taxes	7	10	15	20
Other Cost and Expense, Operating	47	69	110	115
Total other operating expenses	$ 366	$ 418	$ 750	$ 809