Finance Receivables, Net - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 146	$ 89	$ 93	$ 92	$ 89
Provision	4	66	8	9
Charge-offs	(8)	(8)	(11)	(8)
Recoveries and other	1	(1)	3	0
Ending Balance	143	146	93	93	143
Finance receivables collectively evaluated for impairment	3,213		3,442		$ 3,213
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%
United States
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	91	59	53	53	$ 59
Provision	3	35	4	4
Charge-offs	(5)	(3)	(5)	(4)
Recoveries and other	0	0	1	0
Ending Balance	89	91	53	53	89
Finance receivables collectively evaluated for impairment	1,824		1,885		1,824
Canada
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	15	11	12	12	11
Provision	1	6	1	1
Charge-offs	(1)	(1)	(3)	(1)
Recoveries and other	1	(1)	2	0
Ending Balance	16	15	12	12	16
Finance receivables collectively evaluated for impairment	289		336		289
Europe
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	40	19	28	27	19
Provision	0	25	3	4
Charge-offs	(2)	(4)	(3)	(3)
Recoveries and other	0	0	0	0
Ending Balance	38	$ 40	28	$ 28	38
Finance receivables collectively evaluated for impairment	$ 1,100		$ 1,221		$ 1,100