Finance Receivables, Net - Aging of Billed Finance Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total	$ 3,212	$ 3,298
Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	96	103
Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	3,116	3,195
United States
Financing Receivable, Past Due [Line Items]
Total	1,806	1,823
United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	70	76
United States | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	1,736	1,747
Canada
Financing Receivable, Past Due [Line Items]
Total	288	297
Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	9	10
Canada | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	279	287
Europe
Financing Receivable, Past Due [Line Items]
Total	1,118	1,178
Europe | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	17	17
Europe | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	1,101	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	48	54
Current | Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	6	8
Current | Europe | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	12	12
31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	16	15
31-90 Days Past Due | United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	11	10
31-90 Days Past Due | Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	2	2
31-90 Days Past Due | Europe | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	3	3
>90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	14	14
>90 Days Past Due | United States | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	11	12
>90 Days Past Due | Canada | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	1	0
>90 Days Past Due | Europe | 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	100	109
>90 Days and Accruing | United States
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	70	74
>90 Days and Accruing | Canada
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	13	12
>90 Days and Accruing | Europe
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	935	967
Direct | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	45	48
Direct | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	890	919
Direct | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	30	33
Direct | 31-90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	7	6
Direct | >90 Days Past Due | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	8	9
Direct | >90 Days and Accruing
Financing Receivable, Past Due [Line Items]
Financing receivable, 90 days or more past due, still accruing	70	74
Indirect
Financing Receivable, Past Due [Line Items]
Total	871	856
Indirect | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	25	28
Indirect | Unbilled Revenues
Financing Receivable, Past Due [Line Items]
Total	846	828
Indirect | Current | Billed Revenues
Financing Receivable, Past Due [Line Items]
Total	18	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