Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Expenses [Abstract]
Insurance commissions	$ 610	$ 562	$ 517
Technology and communications	406	345	314
Advertising and marketing	366	241	171
Lease and loan administration	201	222	203
Professional services	173	146	118
Property and equipment depreciation	165	153	136
Regulatory and licensing fees	119	75	96
Vehicle remarketing and repossession	91	74	73
Amortization of intangible assets	31	20	18
Charitable contributions	16	63	43
Other	329	305	355
Total other operating expenses	$ 2,507	$ 2,206	$ 2,044