Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Nonoperating Income (Expense) [Abstract]
Late charges and other administrative fees	$ 21	$ 29
Remarketing fees	17	18
Servicing fees	3	6
Income from equity-method investments	(1)	4
Other income, net	40	30
Total other income, net of losses	$ 80	$ 87