Interest Income Recognized on Cash Basis for Finance Receivables that are on Non-accrual Status (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest income recognized on cash basis for finance receivables that are on non-accrual status	$ 0.2	$ 0.4	$ 0.4	$ 0.8
Fleet
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest income recognized on cash basis for finance receivables that are on non-accrual status	$ 0.2	0.3	$ 0.4	0.7
Owner Operator
Financing Receivable, Recorded Investment, Past Due [Line Items]
Interest income recognized on cash basis for finance receivables that are on non-accrual status		$ 0.1		$ 0.1