v2.4.0.8
Financial Instruments Measured At Fair Value, on Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Accumulated other comprehensive loss $ (81.2) $ (73.2)
Fair Value, Recurring
    
Financial instruments measured at fair value, on a recurring basis    
Trading securities 10.8  
Assets, Fair Value Disclosure 10.8  
Derivative Liability, Fair Value, Gross Liability (1.2)  
Business Combination, Contingent Consideration, Liability (2.2)  
Financial and Nonfinancial Liabilities, Fair Value Disclosure (3.4)  
Level 1 | Fair Value, Recurring
    
Financial instruments measured at fair value, on a recurring basis    
Trading securities 10.8  
Assets, Fair Value Disclosure 10.8  
Derivative Liability, Fair Value, Gross Liability 0  
Business Combination, Contingent Consideration, Liability 0  
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0  
Level 2 | Fair Value, Recurring
    
Financial instruments measured at fair value, on a recurring basis    
Trading securities 0  
Assets, Fair Value Disclosure 0  
Derivative Liability, Fair Value, Gross Liability (1.2)  
Business Combination, Contingent Consideration, Liability 0  
Financial and Nonfinancial Liabilities, Fair Value Disclosure (1.2)  
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring
    
Financial instruments measured at fair value, on a recurring basis    
Assets, Fair Value Disclosure 0  
Derivative Liability, Fair Value, Gross Liability 0  
Business Combination, Contingent Consideration, Liability (2.2)  
Financial and Nonfinancial Liabilities, Fair Value Disclosure (2.2)  
eScan
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Maximum payout for contingent obligation 17.0  
Swap
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Accumulated other comprehensive loss 0.7  
Swap | Level 2 | Fair Value, Recurring
    
Financial instruments measured at fair value, on a recurring basis    
Derivative Liability, Fair Value, Gross Liability $ (1.2)