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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended
Aug. 10, 2011
LegalMatter
Jul. 28, 2012
Year
Jul. 30, 2011
Jul. 31, 2010
Commitments and Contingencies [Line Items]        
Initial terms of lease, period (in years)   10    
Option to extend lease, period (in years)   5    
Interest and other income, net   $ 4.7 $ 1.1 $ 4.3
Total future minimum rentals   1,702.2 [1],[2]    
Period prior to shipment date to cancel commitments (in days)   30 days    
Other off-balance sheet firm commitments   573.8    
Number of class action lawsuits settled 1      
Suffern, New York facility
        
Commitments and Contingencies [Line Items]        
Number of tenants   2    
Interest and other income, net   1.1 1.8 1.8
Minimum
        
Commitments and Contingencies [Line Items]        
Period of preliminary commitments made in advance of planned receipt (in months)   5 months    
Maximum
        
Commitments and Contingencies [Line Items]        
Period of preliminary commitments made in advance of planned receipt (in months)   7 months    
Chairman or related trusts
        
Commitments and Contingencies [Line Items]        
Number of leased stores   2    
Annual future minimum rentals related-party leases   0.4    
Total future minimum rentals   1.5    
Rent expense on leases   $ 0.4 $ 0.4 $ 0.4
[1] Net of sublease income, which is not significant in any period.
[2] Although certain leases are cancelable if specified sales levels are not achieved, future minimum rentals under such leases have been included in the above table.