Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions		Sep. 30, 2015		Dec. 31, 2014
Derivatives Designated as Hedging Instruments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Nominal volume	[1]	$ 86.7
Derivatives Designated as Hedging Instruments | Other current assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	[1]	0.8
Derivatives Designated as Hedging Instruments | Other current liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liability	[1]	0.0
Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Nominal volume		427.4		$ 459.1
Not Designated as Hedging Instrument | Other current assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset		0.2		1.3
Not Designated as Hedging Instrument | Other current liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liability		0.4		0.4
Less Than One Year | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Nominal volume	[1]	61.2
Less Than One Year | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other current assets | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	[1]	0.6
Less Than One Year | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other current liabilities | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liability	[1]	0.0
Less Than Two Years | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Nominal volume	[1]	25.5
Less Than Two Years | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other Non-Current Asset | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset	[1]	0.2
Less Than Two Years | Derivatives Designated as Hedging Instruments | Foreign Exchange Forward | Other Non-Current Liabilities | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liability	[1]	0.0
Less Than Six Months | Not Designated as Hedging Instrument | Foreign Exchange Swaps
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Nominal volume		427.4	[2]	459.1	[3]
Less Than Six Months | Not Designated as Hedging Instrument | Foreign Exchange Swaps | Other current assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative asset		0.2	[4]	1.3	[5]
Less Than Six Months | Not Designated as Hedging Instrument | Foreign Exchange Swaps | Other current liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liability		$ 0.4	[6]	$ 0.4	[7]

[1] There is no netting since there are no offsetting contracts.

[2] Net nominal amount after deducting for offsetting swaps under ISDA agreements is $352.9 million.

[3] Net nominal amount after deducting for offsetting swaps under ISDA agreements is $390.9 million.

[4] Net amount after deducting for offsetting swaps under ISDA agreements is $0.2 million.

[5] Net amount after deducting for offsetting swaps under ISDA agreements is $1.3 million.

[6] Net amount after deducting for offsetting swaps under ISDA agreements is $0.3 million.

[7] Net amount after deducting for offsetting swaps under ISDA agreements is $0.4 million.