Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating Expenses [Abstract]
Insurance commissions	$ 152	$ 142	$ 452	$ 416
Technology and communications	100	90	297	249
Advertising and marketing	89	57	238	143
Lease and loan administration	45	56	150	168
Professional services	42	36	132	97
Property and equipment depreciation	42	40	122	114
Regulatory and licensing fees	33	19	81	54
Vehicle remarketing and repossession	23	19	65	57
Amortization of intangible assets	9	5	25	14
Charitable contributions	4	2	11	57
Other	85	78	234	215
Total other operating expenses	$ 624	$ 544	$ 1,807	$ 1,584