Allowance for Credit Losses (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 16.1	$ 3.1
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.7
Ending Balance		2.7
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.3
Ending Balance		3.3
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		133.0	121.1
Provision for losses		16.1	3.1
Charge-offs		(10.8)	(3.4)
Recoveries		2.2	1.5
Currency translation and other		(1.2)	1.5
Ending Balance		139.3	123.8
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		2.7	3.4
Provision for losses			0.2
Ending Balance		2.7	3.6
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		1.9	2.2
Provision for losses		(0.2)	(0.1)
Ending Balance		1.7	2.1
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		125.1	112.6
Provision for losses		15.9	3.0
Charge-offs		(10.4)	(3.3)
Recoveries		2.2	1.4
Currency translation and other		(1.2)	1.3
Ending Balance		131.6	115.0
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	3.3	2.9
Provision for losses	[1]	0.4
Charge-offs	[1]	(0.4)	(0.1)
Recoveries	[1]		0.1
Currency translation and other	[1]		0.2
Ending Balance	[1]	$ 3.3	$ 3.1

[1] Operating leases and other trade receivables.