Interest Income Recognized on Cash Basis for Finance Receivables that are on Non-Accrual Status (Detail) - Financial Services - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income recognized:
Interest income recognized on a cash basis	$ 3.6	$ 2.6	$ 2.8
Customer Retail | Fleet
Interest income recognized:
Interest income recognized on a cash basis	3.3	2.2	2.5
Customer Retail | Owner/Operator
Interest income recognized:
Interest income recognized on a cash basis	$ 0.3	$ 0.4	0.2
Dealer | Retail
Interest income recognized:
Interest income recognized on a cash basis			$ 0.1