Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Nonoperating Income (Expense) [Abstract]
Income from equity-method investments	$ 63	$ 7	$ 115	$ 19
Late charges and other administrative fees	28	28	65	85
Remarketing fees	20	19	52	56
Servicing fees	3	4	8	14
Other, net	46	37	91	104
Total other income, net of losses	$ 160	$ 95	$ 331	$ 278