Allowance for Credit Losses (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 0.5		$ 28.8		$ 15.4
Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.4
Ending Balance		3.3		3.4
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.2
Ending Balance		2.1		3.2
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		127.0	[1]	112.4		113.8
Provision for losses		0.5		28.8	[1]	15.4
Charge-offs		(14.8)		(28.0)	[1]	(28.4)
Recoveries		6.5		5.7	[1]	11.0
Currency translation and other		(2.3)		1.9	[1]	0.6
Ending Balance		116.9		127.0	[1]	112.4
Financial Services | ASU 2016-13
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]			118.6
Ending Balance	[1]					118.6
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		3.4		4.3		6.8
Provision for losses				(1.0)		(1.6)
Charge-offs						(0.6)
Currency translation and other		(0.1)		0.1		(0.3)
Ending Balance		3.3		3.4		4.3
Financial Services | Dealer | Wholesale | ASU 2016-13
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				4.3
Ending Balance						4.3
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		8.4		9.2		10.0
Provision for losses		(1.3)		(0.8)		(1.0)
Currency translation and other						0.2
Ending Balance		7.1		8.4		9.2
Financial Services | Dealer | Retail | ASU 2016-13
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				9.2
Ending Balance						9.2
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		112.0		95.2		93.8
Provision for losses		0.6		30.1		14.2
Charge-offs		(12.3)		(26.6)		(24.2)
Recoveries		6.2		5.3		10.7
Currency translation and other		(2.1)		1.8		0.7
Ending Balance		104.4		112.0		95.2
Financial Services | Customer Retail | ASU 2016-13
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				101.4
Ending Balance						101.4
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[2]	3.2		3.7		3.2
Provision for losses	[2]	1.2		0.5		3.8
Charge-offs	[2]	(2.5)		(1.4)		(3.6)
Recoveries	[2]	0.3		0.4		0.3
Currency translation and other	[2]	(0.1)
Ending Balance	[2]	$ 2.1		3.2		3.7
Financial Services | Other | ASU 2016-13
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[2]			$ 3.7
Ending Balance	[2]					$ 3.7

[1] The beginning balance has been adjusted for the adoption of ASU 2016-13.

[2] Operating lease and other trade receivables.