Allowance for Credit Losses (Detail) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 4.6	$ 3.2
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.3
Ending Balance		3.9
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.1
Ending Balance		2.9
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		116.9	127.0
Provision for losses		4.6	3.2
Charge-offs		(4.7)	(7.5)
Recoveries		3.6	3.0
Currency translation and other		(0.8)	(0.4)
Ending Balance		119.6	125.3
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.3	3.4
Provision for losses		0.8
Currency translation and other		(0.2)
Ending Balance		3.9	3.4
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		7.1	8.4
Provision for losses		(2.5)	(0.3)
Ending Balance		4.6	8.1
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		104.4	112.0
Provision for losses		6.1	2.7
Charge-offs		(4.4)	(6.9)
Recoveries		3.3	2.8
Currency translation and other		(1.2)	(0.4)
Ending Balance		108.2	110.2
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	2.1	3.2
Provision for losses	[1]	0.2	0.8
Charge-offs	[1]	(0.3)	(0.6)
Recoveries	[1]	0.3	0.2
Currency translation and other	[1]	0.6
Ending Balance	[1]	$ 2.9	$ 3.6

[1] Operating leases and other trade receivables.