Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Expenses [Abstract]
Insurance commissions	$ 126	$ 114
Technology and communications	79	77
Advertising and marketing	44	48
Lease and loan administration	38	39
Premises and equipment depreciation	34	22
Professional services	31	29
Regulatory and licensing fees	29	28
Vehicle remarketing and repossession	23	27
Occupancy	16	13
Non-income taxes	7	9
Amortization of intangible assets	5	3
Other operating expenses	54	44
Total other operating expenses	$ 486	$ 453