Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating Expenses [Abstract]
Insurance commissions	$ 142	$ 130	$ 416	$ 383
Technology and communications	90	77	249	236
Lease and loan administration	56	57	168	141
Advertising and marketing	57	36	143	112
Property and equipment depreciation	40	34	114	102
Professional services	36	28	97	87
Vehicle remarketing and repossession	19	17	57	51
Charitable contributions	2	2	57	6
Regulatory and licensing fees	19	18	54	76
Occupancy	14	14	47	43
Non-income taxes	8	9	23	23
Amortization of intangible assets	5	4	14	14
Other	56	52	145	149
Total other operating expenses	$ 544	$ 478	$ 1,584	$ 1,423