v2.4.0.6
Derivatives and Hedging Activities - Schedule of Derivative Instruments Not Designated as Cash Flow Hedges (Detail) (Foreign Exchange Forward Purchase Contracts, USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Oct. 26, 2012
Oct. 28, 2011
Oct. 26, 2012
Oct. 28, 2011
Foreign Exchange Forward Purchase Contracts
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized into Income $ (9.7) $ 7.9 $ 6.2 $ 14.1