Allowance for Credit Losses (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses					$ 7.7		$ 11.8
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					129.3		130.0
Provision for losses	4.0		5.3		7.7		11.8
Charge-offs					(9.3)		(14.3)
Recoveries					2.9		3.5
Currency translation and other					0.5		(2.0)
Ending Balance	131.1		129.0		131.1		129.0
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					10.4		11.8
Provision for losses					(0.2)		(0.4)
Charge-offs							(0.1)
Currency translation and other							(0.3)
Ending Balance	10.2		11.0		10.2		11.0
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					13.4		13.4
Provision for losses					(0.5)		(1.0)
Currency translation and other							(0.1)
Ending Balance	12.9		12.3		12.9		12.3
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					97.5		99.2
Provision for losses					7.3		12.7
Charge-offs					(7.6)		(13.4)
Recoveries					2.6		3.0
Currency translation and other					0.5		(1.5)
Ending Balance	100.3		100.0		100.3		100.0
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance					8.0	[1]	5.6	[1]
Provision for losses					1.1	[1]	0.5	[1]
Charge-offs					(1.7)	[1]	(0.8)	[1]
Recoveries					0.3	[1]	0.5	[1]
Currency translation and other							(0.1)	[1]
Ending Balance	$ 7.7	[1]	$ 5.7	[1]	$ 7.7	[1]	$ 5.7	[1]

[1] Operating lease and other trade receivables.