Summary of Non-Accrual Loans and Finance Leases with Specific Reserve and No Specific Reserve (Details) - Financial Services - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with a specific reserve	$ 42.4	$ 46.0
Amortized cost basis with no specific reserve	2.7	5.8
Total	45.1	51.8
Dealer | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with no specific reserve	1.1	1.1
Total	1.1	1.1
Customer Retail | Fleet
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with a specific reserve	37.8	40.3
Amortized cost basis with no specific reserve	1.6	4.7
Total	39.4	45.0
Customer Retail | Owner/Operator
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with a specific reserve	4.6	5.7
Total	$ 4.6	$ 5.7