Allowance for Credit Losses (Detail) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 27.8	$ 7.9
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.7
Ending Balance		2.9
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.3
Ending Balance		3.1
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		133.0	121.1
Provision for losses		27.8	7.9
Charge-offs		(24.8)	(9.4)
Recoveries		5.5	3.2
Currency translation and other		(4.3)	3.4
Ending Balance		137.2	126.2
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.7	3.4
Provision for losses		0.3	0.3
Currency translation and other		(0.1)	0.1
Ending Balance		2.9	3.8
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		1.9	2.2
Provision for losses		(0.4)	(0.3)
Ending Balance		1.5	1.9
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		125.1	112.6
Provision for losses		28.4	8.4
Charge-offs		(24.3)	(9.4)
Recoveries		4.5	3.1
Currency translation and other		(4.0)	3.0
Ending Balance		129.7	117.7
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	3.3	2.9
Provision for losses	[1]	(0.5)	(0.5)
Charge-offs	[1]	(0.5)
Recoveries	[1]	1.0	0.1
Currency translation and other	[1]	(0.2)	0.3
Ending Balance	[1]	$ 3.1	$ 2.8

[1] Operating leases and other trade receivables.