Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Nonoperating Income (Expense) [Abstract]
Income from equity-method investments	$ 161	$ 62	$ 46
Gain on nonmarketable equity investments, net	99	9	4
Late charges and other administrative fees	93	114	110
Remarketing fees	73	74	79
Servicing fees	10	17	27
Other, net	129	129	152
Total other income, net of losses	$ 565	$ 405	$ 418