Allowance for Credit Losses (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses		$ 18.4	$ 12.4	$ 15.4
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		114.8	122.0	129.3
Provision for losses		18.4	12.4	15.4
Charge-offs		(25.0)	(17.1)	(21.3)
Recoveries		5.8	4.0	5.3
Currency translation and other		(2.8)	(6.5)	(6.7)
Ending Balance		111.2	114.8	122.0
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		7.3	9.0	10.4
Provision for losses		(1.7)	(0.8)	0.3
Charge-offs		0.0	(0.3)	(0.9)
Recoveries		0.0	0.0	0.0
Currency translation and other		(0.1)	(0.6)	(0.8)
Ending Balance		5.5	7.3	9.0
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		10.3	11.9	13.4
Provision for losses		(0.7)	(1.4)	(1.4)
Charge-offs		0.0	0.0	0.0
Recoveries		0.0	0.0	0.0
Currency translation and other		0.0	(0.2)	(0.1)
Ending Balance		9.6	10.3	11.9
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance		88.9	93.6	97.5
Provision for losses		18.6	11.6	14.8
Charge-offs		(22.9)	(13.6)	(18.2)
Recoveries		5.5	3.5	4.6
Currency translation and other		(2.6)	(6.2)	(5.1)
Ending Balance		87.5	88.9	93.6
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]	8.3	7.5	8.0
Provision for losses	[1]	2.2	3.0	1.7
Charge-offs	[1]	(2.1)	(3.2)	(2.2)
Recoveries	[1]	0.3	0.5	0.7
Currency translation and other	[1]	(0.1)	0.5	(0.7)
Ending Balance	[1]	$ 8.6	$ 8.3	$ 7.5

[1] Operating lease and other trade receivables.