Finance Receivables, Net - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision	$ 6	$ 66
Reserves as a percentage of receivables		4.00%
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	133	$ 89
Provision	6	66
Charge-offs	(3)	(8)
Recoveries and other	(1)	(1)
Ending Balance	135	146
Finance receivables collectively evaluated for impairment	$ 3,212	3,287
Loss rates of customers with investment grade credit quality	1.00%
Loss rates of customers with non investment grade credit quality, low range	2.00%
Loss rates of customers with non investment grade credit quality, high range	5.00%
Loss rates of customers with substandard doubtful credit quality - low	7.00%
Loss rates of customers with substandard doubtful credit quality - high	10.00%
COVID-19 Pandemic
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision		60
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision		60
United States
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision	$ 2	35
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	77	59
Provision	2	35
Charge-offs	(2)	(3)
Recoveries and other	1	0
Ending Balance	78	91
Finance receivables collectively evaluated for impairment	1,806	1,866
Canada
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision	1	6
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	15	10
Provision	1	6
Charge-offs	0	(1)
Recoveries and other	0	0
Ending Balance	16	15
Finance receivables collectively evaluated for impairment	288	289
Europe
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision	3	25
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	41	20
Provision	3	25
Charge-offs	(1)	(4)
Recoveries and other	(2)	(1)
Ending Balance	41	40
Finance receivables collectively evaluated for impairment	$ 1,118	$ 1,132