Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Additional Information (Detail)

v2.4.0.8
Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 0 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative asset fair value $ 2.4 $ 8.0
Derivative liability fair value 6.8 5.1
Foreign exchange currency contracts [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative aggregate notional amounts 569.1  
Derivative asset fair value 2.4 8.0
Derivative liability fair value 6.8 5.1
Foreign exchange currency contracts [Member] | Derivatives designated as cash flow hedging instruments [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative aggregate notional amounts 251.7 244.7
Derivative remaining maturity period 12 months  
Derivative asset fair value 0.9 5.7
Derivative liability fair value $ 4.6 $ 4.4
Foreign exchange forward contracts [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative maximum remaining maturity period 12 months 12 months
Freestanding derivatives [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative average remaining maturity period 2 months 3 months
Foreign currency option contracts [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Number of derivative instruments held 0 0