Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Total Outstanding Notional Amount and Fair Value of Company's Derivative Instruments (Detail)

v2.4.0.8
Fair Value Measurements - Schedule of Total Outstanding Notional Amount and Fair Value of Company's Derivative Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Derivatives, Fair Value [Line Items]    
Notional Amount $ 258.7 $ 25.0
Derivative Assets 2.3   
Derivative Liabilities 0.5 1.3
Interest rate swap contracts [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount 100.0  
Derivatives accounted for as hedges [Member] | Foreign currency forward contracts [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount 9.7   
Derivative Assets 0.5   
Derivative Liabilities      
Derivatives not accounted for as hedges [Member] | Foreign currency forward contracts [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount 124.0   
Derivative Assets 1.8   
Derivative Liabilities      
Derivatives not accounted for as hedges [Member] | Interest rate swap contracts [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount 125.0 25.0
Derivative Assets      
Derivative Liabilities $ 0.5 $ 1.3