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Commitments And Contingencies (Tables)
 3 Months Ended
Jul. 29, 2011
Commitments And Contingencies  
Product Warranty Disclosure
     Three Months Ended  
     July 29,
2011		     July 30,
2010		  

Beginning balance

    $ 40.5      $ 31.9   

Liability assumed in acquisition

      17.5        0.0   

Expense accrued during the period

      11.7        5.9   

Warranty costs incurred

      (10.2 )      (5.7 ) 
  

 

 

    

 

 

  

Ending balance

    $ 59.5      $ 32.1