Allowance for Credit Losses (Detail) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 14.1	$ 3.8
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.4
Ending Balance		2.6
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.9
Ending Balance		2.6
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		121.1	116.9
Provision for losses		14.1	3.8
Charge-offs		(17.2)	(6.4)
Recoveries		5.6	7.1
Currency translation and other		1.2	(3.5)
Ending Balance		124.8	117.9
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.4	3.3
Provision for losses		(0.8)	0.4
Recoveries			0.1
Currency translation and other			(0.3)
Ending Balance		2.6	3.5
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.2	7.1
Provision for losses		(0.8)	(3.3)
Ending Balance		1.4	3.8
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		112.6	104.4
Provision for losses		16.3	8.1
Charge-offs		(16.0)	(6.3)
Recoveries		4.3	5.2
Currency translation and other		1.0	(3.9)
Ending Balance		118.2	107.5
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	2.9	2.1
Provision for losses	[1]	(0.6)	(1.4)
Charge-offs	[1]	(1.2)	(0.1)
Recoveries	[1]	1.3	1.8
Currency translation and other	[1]	0.2	0.7
Ending Balance	[1]	$ 2.6	$ 3.1

[1] Operating leases and other trade receivables.