Allowance for Credit Losses (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 3.4	$ 2.7
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		114.8	122.0
Provision for losses		3.4	2.7
Charge-offs		(5.9)	(3.0)
Recoveries		0.7	0.9
Currency translation and other		1.9	(4.8)
Ending Balance		114.9	117.8
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		7.3	9.0
Provision for losses		(0.5)	0.3
Recoveries		0.1
Currency translation and other		0.2	(0.5)
Ending Balance		7.1	8.8
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		10.3	11.9
Provision for losses		(0.5)	(0.2)
Currency translation and other		0.1	(0.2)
Ending Balance		9.9	11.5
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		88.9	93.6
Provision for losses		3.2	1.9
Charge-offs		(5.4)	(2.5)
Recoveries		0.6	0.8
Currency translation and other		1.2	(4.7)
Ending Balance		88.5	89.1
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	8.3	7.5
Provision for losses	[1]	1.2	0.7
Charge-offs	[1]	(0.5)	(0.5)
Recoveries	[1]		0.1
Currency translation and other	[1]	0.4	0.6
Ending Balance	[1]	$ 9.4	$ 8.4

[1] Operating leases and other trade receivables.