Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Expenses [Abstract]
Insurance commissions	$ 117	$ 109	$ 231	$ 219
Technology and communications	73	74	150	145
Advertising and marketing	35	29	83	68
Lease and loan administration	43	40	82	82
Professional services	30	35	59	67
Regulatory and licensing fees	28	35	56	65
Vehicle remarketing and repossession	25	26	52	58
Premises and equipment depreciation	25	22	47	42
Occupancy	16	11	29	22
Non-income taxes	11	6	20	14
Amortization of intangible assets	3	3	6	6
Other operating expenses	52	56	96	103
Total other operating expenses	$ 458	$ 446	$ 911	$ 891