Allowance for Credit Losses (Detail) (Financial Services, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 130.0		$ 139.0		$ 145.0
Provision for losses	12.9		20.0		41.4
Charge-offs	(24.5)		(38.7)		(58.9)
Recoveries	10.9		7.4		13.9
Currency translation and other			2.3		(2.4)
Ending Balance	129.3		130.0		139.0
Dealer wholesale financing
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	11.8		11.7		7.5
Provision for losses	(0.9)		1.8		5.8
Charge-offs	(0.5)				(1.4)
Currency translation and other			(1.7)		(0.2)
Ending Balance	10.4		11.8		11.7
Retail | Dealer
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	13.4		12.0		10.1
Provision for losses	0.2		1.4		1.9
Currency translation and other	(0.2)
Ending Balance	13.4		13.4		12.0
Retail | Customer
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	99.2		106.5		123.4
Provision for losses	9.8		13.1		19.8
Charge-offs	(21.2)		(32.1)		(47.3)
Recoveries	9.9		7.0		12.7
Currency translation and other	(0.2)		4.7		(2.1)
Ending Balance	97.5		99.2		106.5
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	5.6	[1]	8.8	[1]	4.0	[1]
Provision for losses	3.8	[1]	3.7	[1]	13.9	[1]
Charge-offs	(2.8)	[1]	(6.6)	[1]	(10.2)	[1]
Recoveries	1.0	[1]	0.4	[1]	1.2	[1]
Currency translation and other	0.4	[1]	(0.7)	[1]	(0.1)	[1]
Ending Balance	$ 8.0	[1]	$ 5.6	[1]	$ 8.8	[1]

[1] Operating lease and other trade receivables.