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Segment, Geographic, And Significant Customer Information (Schedule Of Assets By Geographic Areas) (Details) (USD $)
In Millions, unless otherwise specified
Jul. 29, 2011
Apr. 29, 2011
Segment, Geographic, And Significant Customer Information    
United States $ 910.0 $ 840.2
International 83.3 71.4
Total property and equipment $ 993.3 $ 911.6
Concentration risk, percentage 10.00%