Allowance for Credit Losses (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 12.4	$ 15.4	$ 12.9
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		122.0	129.3	130.0
Provision for losses		12.4	15.4	12.9
Charge-offs		(17.1)	(21.3)	(24.5)
Recoveries		4.0	5.3	10.9
Currency translation and other		(6.5)	(6.7)
Ending Balance		114.8	122.0	129.3
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		9.0	10.4	11.8
Provision for losses		(0.8)	0.3	(0.9)
Charge-offs		(0.3)	(0.9)	(0.5)
Currency translation and other		(0.6)	(0.8)
Ending Balance		7.3	9.0	10.4
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		11.9	13.4	13.4
Provision for losses		(1.4)	(1.4)	0.2
Currency translation and other		(0.2)	(0.1)	(0.2)
Ending Balance		10.3	11.9	13.4
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		93.6	97.5	99.2
Provision for losses		11.6	14.8	9.8
Charge-offs		(13.6)	(18.2)	(21.2)
Recoveries		3.5	4.6	9.9
Currency translation and other		(6.2)	(5.1)	(0.2)
Ending Balance		88.9	93.6	97.5
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	7.5	8.0	5.6
Provision for losses	[1]	3.0	1.7	3.8
Charge-offs	[1]	(3.2)	(2.2)	(2.8)
Recoveries	[1]	0.5	0.7	1.0
Currency translation and other	[1]	0.5	(0.7)	0.4
Ending Balance	[1]	$ 8.3	$ 7.5	$ 8.0

[1] Operating lease and other trade receivables.