Finance Receivables, Net - Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 567
2019	1,106
2018	815
2017	462
2016	215
Prior	48
Subtotal	3,213	$ 3,440
United States (Direct):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	145
2019	328
2018	257
2017	158
2016	90
Prior	23
Subtotal	1,001	1,103
United States (Indirect):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	164
2019	319
2018	203
2017	99
2016	33
Prior	5
Subtotal	823	819
Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	50
2019	89
2018	70
2017	50
2016	25
Prior	5
Subtotal	289	326
Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	208
2019	370
2018	285
2017	155
2016	67
Prior	15
Subtotal	1,100	1,192
Low Credit Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2020	301
2019	613
2018	483
2017	264
2016	134
Prior	30
Subtotal	1,825	1,716
Low Credit Risk | United States (Direct):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	86
2019	187
2018	179
2017	115
2016	68
Prior	16
Subtotal	651	640
Low Credit Risk | United States (Indirect):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	100
2019	194
2018	116
2017	55
2016	19
Prior	3
Subtotal	487	258
Low Credit Risk | Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	16
2019	36
2018	29
2017	13
2016	11
Prior	3
Subtotal	108	163
Low Credit Risk | Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	99
2019	196
2018	159
2017	81
2016	36
Prior	8
Subtotal	579	655
Average Credit Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2020	203
2019	415
2018	275
2017	157
2016	64
Prior	14
Subtotal	1,128	1,352
Average Credit Risk | United States (Direct):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	25
2019	97
2018	50
2017	29
2016	14
Prior	4
Subtotal	219	331
Average Credit Risk | United States (Indirect):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	54
2019	119
2018	81
2017	41
2016	13
Prior	2
Subtotal	310	445
Average Credit Risk | Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	23
2019	42
2018	30
2017	23
2016	10
Prior	2
Subtotal	130	97
Average Credit Risk | Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	101
2019	157
2018	114
2017	64
2016	27
Prior	6
Subtotal	469	479
High Credit Risk
Financing Receivable, Credit Quality Indicator [Line Items]
2020	63
2019	78
2018	57
2017	41
2016	17
Prior	4
Subtotal	260	372
High Credit Risk | United States (Direct):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	34
2019	44
2018	28
2017	14
2016	8
Prior	3
Subtotal	131	132
High Credit Risk | United States (Indirect):
Financing Receivable, Credit Quality Indicator [Line Items]
2020	10
2019	6
2018	6
2017	3
2016	1
Prior	0
Subtotal	26	116
High Credit Risk | Canada
Financing Receivable, Credit Quality Indicator [Line Items]
2020	11
2019	11
2018	11
2017	14
2016	4
Prior	0
Subtotal	51	66
High Credit Risk | Europe
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8
2019	17
2018	12
2017	10
2016	4
Prior	1
Subtotal	$ 52	$ 58