Finance Receivables, Net - Finance Receivables Credit Quality Indicators (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loss rates of customers with low risk credit quality (percentage)	1.00%
Loss rates of customers with average credit risk credit quality, low range (percentage)	2.00%
Loss rates of customers with average credit risk credit quality, high range (percentage)	5.00%
Loss rates of customers with high credit risk credit quality, low range (percentage)	7.00%
Loss rates of customers with high credit risk credit quality, high range (percentage)	10.00%
2020	$ 1,140
2019	1,005
2018	680
2017	337
2016	116
Prior	20
Total Finance Receivables	3,298	$ 3,440
United States
Financing Receivable, Credit Quality Indicator [Line Items]
Total Finance Receivables	1,823	1,922
Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	101
2019	83
2018	60
2017	37
2016	14
Prior	2
Total Finance Receivables	297	326
Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	390
2019	361
2018	254
2017	123
2016	41
Prior	9
Total Finance Receivables	1,178	1,192
Low Credit Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2020	591
2019	502
2018	362
2017	176
2016	64
Prior	9
Total Finance Receivables	1,704	1,716
Low Credit Risk | Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	37
2019	34
2018	24
2017	10
2016	5
Prior	1
Total Finance Receivables	111	163
Low Credit Risk | Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	197
2019	177
2018	131
2017	62
2016	20
Prior	4
Total Finance Receivables	591	655
Average Credit Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2020	399
2019	418
2018	257
2017	125
2016	39
Prior	7
Total Finance Receivables	1,245	1,352
Average Credit Risk | Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	46
2019	39
2018	26
2017	17
2016	6
Prior	1
Total Finance Receivables	135	97
Average Credit Risk | Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	170
2019	160
2018	108
2017	51
2016	17
Prior	4
Total Finance Receivables	510	479
High Credit Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2020	150
2019	85
2018	61
2017	36
2016	13
Prior	4
Total Finance Receivables	349	372
High Credit Risk | Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	18
2019	10
2018	10
2017	10
2016	3
Prior	0
Total Finance Receivables	51	66
High Credit Risk | Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	23
2019	24
2018	15
2017	10
2016	4
Prior	1
Total Finance Receivables	77	58
Direct
Financing Receivable, Credit Quality Indicator [Line Items]
Total Finance Receivables	967	1,103
Direct | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	308
2019	288
2018	207
2017	110
2016	45
Prior	9
Total Finance Receivables	967	1,103
Direct | Low Credit Risk | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	164
2019	151
2018	128
2017	71
2016	32
Prior	4
Total Finance Receivables	550	640
Direct | Average Credit Risk | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	54
2019	95
2018	52
2017	26
2016	8
Prior	2
Total Finance Receivables	237	331
Direct | High Credit Risk | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	90
2019	42
2018	27
2017	13
2016	5
Prior	3
Total Finance Receivables	180	132
Indirect
Financing Receivable, Credit Quality Indicator [Line Items]
Total Finance Receivables	856	819
Indirect | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	341
2019	273
2018	159
2017	67
2016	16
Prior	0
Total Finance Receivables	856	819
Indirect | Low Credit Risk | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	193
2019	140
2018	79
2017	33
2016	7
Prior	0
Total Finance Receivables	452	258
Indirect | Average Credit Risk | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	129
2019	124
2018	71
2017	31
2016	8
Prior	0
Total Finance Receivables	363	445
Indirect | High Credit Risk | United States
Financing Receivable, Credit Quality Indicator [Line Items]
2020	19
2019	9
2018	9
2017	3
2016	1
Prior	0
Total Finance Receivables	$ 41	$ 116