Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Expenses [Abstract]
Insurance commissions	$ 149	$ 136
Technology and communications	97	78
Advertising and marketing	72	41
Lease and loan administration	51	55
Professional services	43	33
Property and equipment depreciation	39	36
Regulatory and licensing fees	26	18
Vehicle remarketing and repossession	20	21
Amortization of intangible assets	8	5
Other	66	62
Total other operating expenses	$ 571	$ 485