Summary of Non-Accrual Loans and Finance Leases with Specific Reserve and No Specific Reserve (Details) - Financial Services - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with a specific reserve	$ 34.1	$ 37.5
Amortized cost basis with no specific reserve	27.2	16.9
Total	61.3	54.4
Dealer | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with no specific reserve		0.7
Total		0.7
Customer Retail | Fleet
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with a specific reserve	27.9	33.9
Amortized cost basis with no specific reserve	26.7	16.2
Total	54.6	50.1
Customer Retail | Owner/Operator
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized cost basis with a specific reserve	6.2	3.6
Amortized cost basis with no specific reserve	0.5
Total	$ 6.7	$ 3.6