Interest Income Recognized on Cash Basis for Finance Receivables that are on Non-Accrual Status (Detail) - Financial Services - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest income recognized:
Interest income recognized on a cash basis	$ 1.6	$ 1.6	$ 2.2	$ 2.7
Dealer | Retail
Interest income recognized:
Interest income recognized on a cash basis	0.1	0.1	0.1	0.1
Customer Retail | Fleet
Interest income recognized:
Interest income recognized on a cash basis	1.4	1.4	1.9	2.4
Customer Retail | Owner/Operator
Interest income recognized:
Interest income recognized on a cash basis	$ 0.1	$ 0.1	$ 0.2	$ 0.2