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, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest income recognized on a cash basis on finance loans/leases:
Interest income recognized on a cash basis	$ 3.8	$ 2.0	$ 1.8
Customer Retail | Fleet
Interest income recognized on a cash basis on finance loans/leases:
Interest income recognized on a cash basis	3.1	1.6	1.4
Customer Retail | Owner/Operator
Interest income recognized on a cash basis on finance loans/leases:
Interest income recognized on a cash basis	0.5	0.2	0.2
Dealer | Retail
Interest income recognized on a cash basis on finance loans/leases:
Interest income recognized on a cash basis	$ 0.2	$ 0.2	$ 0.2