Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Nonoperating Income (Expense) [Abstract]
Income from equity-method investments	$ 53	$ 8	$ 52	$ 12
Late charges and other administrative fees	16	28	37	57
Remarketing fees	15	19	32	37
Servicing fees	2	4	5	10
Other, net	4	34	44	64
Total other income, net of losses	$ 90	$ 93	$ 170	$ 180