Finance Receivables, Net - Aging of Billed Finance Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	$ 3,287	$ 3,440
Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	111	115
Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	3,176	3,325
Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	78	82
31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	17	19
>90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	16	14
>90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Finance receivables, greater than 90 days and accruing	111	106
United States (Direct):
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	1,038	1,103
United States (Direct): | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	53	56
United States (Direct): | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	985	1,047
United States (Direct): | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	35	37
United States (Direct): | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	7	11
United States (Direct): | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	11	8
United States (Direct): | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Finance receivables, greater than 90 days and accruing	71	57
United States (Indirect):
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	828	819
United States (Indirect): | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	31	33
United States (Indirect): | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	797	786
United States (Indirect): | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	23	25
United States (Indirect): | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	5	5
United States (Indirect): | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	3	3
United States (Indirect): | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Finance receivables, greater than 90 days and accruing	0	0
Total United States
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	1,866	1,922
Total United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	84	89
Total United States | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	1,782	1,833
Total United States | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	58	62
Total United States | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	12	16
Total United States | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	14	11
Total United States | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Finance receivables, greater than 90 days and accruing	71	57
Canada
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	289	326
Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	9	11
Canada | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	280	315
Canada | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	7	8
Canada | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	2	2
Canada | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	0	1
Canada | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Finance receivables, greater than 90 days and accruing	15	17
EMEA
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	1,132	1,192
EMEA | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	18	15
EMEA | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	1,114	1,177
EMEA | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	13	12
EMEA | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	3	1
EMEA | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total Finance Receivables	2	2
EMEA | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Finance receivables, greater than 90 days and accruing	$ 25	$ 32