Allowance for Credit Losses (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses					$ 12.5		$ 15.4
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					129.3		130.0
Provision for losses	4.8		3.6		12.5		15.4
Charge-offs					(14.1)		(18.0)
Recoveries					3.9		5.2
Currency translation and other					(3.7)		(0.9)
Ending Balance	127.9		131.7		127.9		131.7
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					10.4		11.8
Provision for losses					0.2		(0.7)
Charge-offs							(0.2)
Currency translation and other					(0.5)
Ending Balance	10.1		10.9		10.1		10.9
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					13.4		13.4
Provision for losses					(0.5)		(0.7)
Currency translation and other					(0.1)		(0.1)
Ending Balance	12.8		12.6		12.8		12.6
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					97.5		99.2
Provision for losses					11.5		11.2
Charge-offs					(11.4)		(11.1)
Recoveries					3.3		4.2
Currency translation and other					(3.9)		(4.0)
Ending Balance	97.0		99.5		97.0		99.5
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					8.0	[1]	5.6	[1]
Provision for losses					1.3	[1]	5.6	[1]
Charge-offs					(2.7)	[1]	(6.7)	[1]
Recoveries					0.6	[1]	1.0	[1]
Currency translation and other					0.8	[1]	3.2	[1]
Ending Balance	$ 8.0	[1]	$ 8.7	[1]	$ 8.0	[1]	$ 8.7	[1]

[1] Operating lease and other trade receivables.