Derivatives - Schedule of Gross and Net Amounts of Foreign Exchange Forward Contracts and Interest Rate Swaps (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Gross Amounts of Assets	$ 20.6	$ 1.7
Impact of Netting, Assets	0	0
Derivatives assets	20.6	1.7
All Other Amounts Subject to Master Netting Agreements, Assets	(1.9)	(0.6)
Potential Net Amounts of Assets	18.7	1.1
Gross Amounts of Liabilities	3.2	10.6
Impact of Netting, Liabilities	0	0
Derivatives liabilities	3.2	10.6
All Other Amounts Subject to Master Netting Agreements, Liabilities	(1.9)	(0.6)
Potential Net Amounts of Liabilities	1.3	10.0
Not Designated as Hedging Instrument | Foreign Exchange Forward Contracts
Derivative [Line Items]
Gross Amounts of Assets	20.6	0.4
Impact of Netting, Assets	0	0
Derivatives assets	20.6	0.4
All Other Amounts Subject to Master Netting Agreements, Assets	(1.9)	(0.4)
Potential Net Amounts of Assets	18.7
Gross Amounts of Liabilities	0.3	1.5
Impact of Netting, Liabilities	0	0
Derivatives liabilities	0.3	1.5
All Other Amounts Subject to Master Netting Agreements, Liabilities	(0.1)	(0.2)
Potential Net Amounts of Liabilities	0.2	1.3
Designated Fair Value Hedges | Interest Rate Swap
Derivative [Line Items]
Gross Amounts of Assets		1.3
Impact of Netting, Assets	0	0
Derivatives assets		1.3
All Other Amounts Subject to Master Netting Agreements, Assets		(0.2)
Potential Net Amounts of Assets		1.1
Gross Amounts of Liabilities	2.9	9.1
Impact of Netting, Liabilities	0	0
Derivatives liabilities	2.9	9.1
All Other Amounts Subject to Master Netting Agreements, Liabilities	(1.8)	(0.4)
Potential Net Amounts of Liabilities	$ 1.1	$ 8.7