Allowance for Credit Losses (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for losses				$ 6.3	$ 7.7
Financial Services
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				122.0	129.3
Provision for losses		$ 3.6	$ 4.0	6.3	7.7
Charge-offs				(6.1)	(9.3)
Recoveries				1.7	2.9
Currency translation and other				(3.6)	0.5
Ending Balance		120.3	131.1	120.3	131.1
Financial Services | Dealer | Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				9.0	10.4
Provision for losses				0.2	(0.2)
Currency translation and other				(0.5)
Ending Balance		8.7	10.2	8.7	10.2
Financial Services | Dealer | Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				11.9	13.4
Provision for losses				(0.5)	(0.5)
Currency translation and other				(0.1)
Ending Balance		11.3	12.9	11.3	12.9
Financial Services | Customer Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance				93.6	97.5
Provision for losses				5.2	7.3
Charge-offs				(5.2)	(7.6)
Recoveries				1.5	2.6
Currency translation and other				(3.7)	0.5
Ending Balance		91.4	100.3	91.4	100.3
Financial Services | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	[1]			7.5	8.0
Provision for losses	[1]			1.4	1.1
Charge-offs	[1]			(0.9)	(1.7)
Recoveries	[1]			0.2	0.3
Currency translation and other	[1]			0.7
Ending Balance	[1]	$ 8.9	$ 7.7	$ 8.9	$ 7.7

[1] Operating leases and other trade receivables.