Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Expenses [Abstract]
Insurance commissions	$ 138	$ 127	$ 274	$ 253
Technology and communications	81	80	159	159
Lease and loan administration	57	46	112	84
Advertising and marketing	45	32	86	76
Property and equipment depreciation	38	34	74	68
Professional services	28	28	61	59
Charitable contributions	54	3	55	4
Vehicle remarketing and repossession	17	11	38	34
Regulatory and licensing fees	17	29	35	58
Occupancy	18	13	33	29
Non-income taxes	9	7	15	14
Amortization of intangible assets	4	5	9	10
Other	49	44	89	97
Total other operating expenses	$ 555	$ 459	$ 1,040	$ 945