Finance Receivables, Net - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Finance receivable lease portfolio average maturity - low (years)	2 years
Finance receivable lease portfolio average maturity - high (years)	3 years
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	$ 89	$ 92
Provision	81	28
Charge-offs	(42)	(34)
Recoveries and other	5	3
Allowance for credit loss, end of period	133	89
Finance Receivables Collectively Evaluated for Impairment	$ 3,298	$ 3,440
Credit Concentration Risk | Finance Receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Concentration risk (percentage)	4.00%	2.60%
United States
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	$ 59	$ 53
Provision	41	20
Charge-offs	(23)	(15)
Recoveries and other	0	1
Allowance for credit loss, end of period	77	59
Finance Receivables Collectively Evaluated for Impairment	1,823	1,922
Canada
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	10	12
Provision	8	1
Charge-offs	(5)	(5)
Recoveries and other	2	2
Allowance for credit loss, end of period	15	10
Finance Receivables Collectively Evaluated for Impairment	297	326
Europe
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	20	27
Provision	32	7
Charge-offs	(14)	(14)
Recoveries and other	3	0
Allowance for credit loss, end of period	41	20
Finance Receivables Collectively Evaluated for Impairment	$ 1,178	$ 1,192