Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Expenses [Abstract]
Insurance commissions	$ 114	$ 110
Technology and communications	77	71
Advertising and marketing	48	39
Lease and loan administration	39	42
Professional services	29	32
Regulatory and licensing fees	28	30
Vehicle remarketing and repossession	27	32
Premises and equipment depreciation	22	20
Occupancy	13	11
Non-income taxes	9	8
Amortization of intangible assets	3	3
Other operating expenses	44	47
Total other operating expenses	$ 453	$ 445