Finance Receivables, Net - Aging of Billed Finance Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total	$ 3,250	$ 3,298
Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	92	103
Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	3,158	3,195
United States
Financing Receivable, Past Due [Line Items]
Total	1,845	1,823
United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	69	76
United States | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	1,776	1,747
Canada
Financing Receivable, Past Due [Line Items]
Total	283	297
Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	8	10
Canada | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	275	287
EMEA
Financing Receivable, Past Due [Line Items]
Total	1,122	1,178
EMEA | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	15	17
EMEA | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	1,107	1,161
Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	66	74
Current | United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	49	54
Current | Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	6	8
Current | EMEA | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	11	12
31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	14	15
31-90 Days Past Due | United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	10	10
31-90 Days Past Due | Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	2	2
31-90 Days Past Due | EMEA | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	2	3
>90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	12	14
>90 Days Past Due | United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	10	12
>90 Days Past Due | Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	0	0
>90 Days Past Due | EMEA | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	2	2
>90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	89	109
>90 Days and Accruing | United States
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	60	74
>90 Days and Accruing | Canada
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	12	12
>90 Days and Accruing | EMEA
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	17	23
Direct
Financing Receivable, Past Due [Line Items]
Total	921	967
Direct | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	42	48
Direct | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	879	919
Direct | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	29	33
Direct | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	6	6
Direct | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	7	9
Direct | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	60	74
Indirect
Financing Receivable, Past Due [Line Items]
Total	924	856
Indirect | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	27	28
Indirect | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	897	828
Indirect | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	20	21
Indirect | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	4	4
Indirect | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	3	3
Indirect | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	$ 0	$ 0