v2.4.0.6
Derivatives And Hedging Activities (Schedule of Derivative Instruments Not Designated as Cash Flow Hedges) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Jan. 27, 2012
Jan. 28, 2011
Jan. 27, 2012
Jan. 28, 2011
Derivatives And Hedging Activities [Abstract]        
Gain (Loss) Recognized into Income $ 10.7 $ (0.2) $ 24.9 $ (4.4)