Finance Receivables, Net - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 143	$ 146	$ 89	$ 93	$ 93	$ 92	$ 89
Provision	9	4	66	8	8	9
Charge-offs	(13)	(8)	(8)	(9)	(11)	(8)
Recoveries and other	3	1	(1)	1	3	0
Ending Balance	142	143	146	93	93	93	142
Finance receivables collectively evaluated for impairment	3,218			3,381			$ 3,218
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	89	91	59	53	53	53	$ 59
Provision	6	3	35	6	4	4
Charge-offs	(6)	(5)	(3)	(5)	(5)	(4)
Recoveries and other	0	0	0	1	1	0
Ending Balance	89	89	91	55	53	53	89
Finance receivables collectively evaluated for impairment	1,819			1,900			1,819
Canada
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	16	15	11	12	12	12	11
Provision	0	1	6	0	1	1
Charge-offs	(2)	(1)	(1)	(1)	(3)	(1)
Recoveries and other	1	1	(1)	0	2	0
Ending Balance	15	16	15	11	12	12	15
Finance receivables collectively evaluated for impairment	284			324			284
Europe
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	38	40	19	28	28	27	19
Provision	3	0	25	2	3	4
Charge-offs	(5)	(2)	(4)	(3)	(3)	(3)
Recoveries and other	2	0	0	0	0	0
Ending Balance	38	$ 38	$ 40	27	$ 28	$ 28	38
Finance receivables collectively evaluated for impairment	$ 1,115			$ 1,157			$ 1,115