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Segment Geographic and Significant Customer Information - Schedule of Property and Equipment Net by Geographic Areas (Detail) (USD $)
In Millions, unless otherwise specified
Jul. 26, 2013
Apr. 26, 2013
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 1,163.4 $ 1,170.9
United States
   
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment 1,071.0 1,076.3
International
   
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 92.4 $ 94.6