Allowance for Credit Losses (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses				$ 9.4	$ 6.3
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				114.8	122.0
Provision for losses		$ 6.0	$ 3.6	9.4	6.3
Charge-offs				(11.3)	(6.1)
Recoveries				1.4	1.7
Currency translation and other				0.1	(3.6)
Ending Balance		114.4	120.3	114.4	120.3
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				7.3	9.0
Provision for losses				(1.1)	0.2
Charge-offs				0.0	0.0
Recoveries				0.0	0.0
Currency translation and other				0.1	(0.5)
Ending Balance		6.3	8.7	6.3	8.7
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				10.3	11.9
Provision for losses				(0.5)	(0.5)
Charge-offs				0.0	0.0
Recoveries				0.0	0.0
Currency translation and other				0.1	(0.1)
Ending Balance		9.9	11.3	9.9	11.3
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				88.9	93.6
Provision for losses				9.6	5.2
Charge-offs				(9.7)	(5.2)
Recoveries				1.3	1.5
Currency translation and other				(0.4)	(3.7)
Ending Balance		89.7	91.4	89.7	91.4
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]			8.3	7.5
Provision for losses	[1]			1.4	1.4
Charge-offs	[1]			(1.6)	(0.9)
Recoveries	[1]			0.1	0.2
Currency translation and other	[1]			0.3	0.7
Ending Balance	[1]	$ 8.5	$ 8.9	$ 8.5	$ 8.9

[1] Operating leases and other trade receivables.