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Restructuring - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended
Jan. 30, 2015
Oct. 31, 2014
Dec. 05, 2013
Oct. 25, 2013
Restructuring And Related Activities [Abstract]        
Total expected integration cost     $ 35,000,000us-gaap_RestructuringAndRelatedCostExpectedCost1  
Restructuring expense 5,000,000us-gaap_RestructuringCosts 20,400,000us-gaap_RestructuringCosts    
Accrued restructuring $ 4,566,000us-gaap_RestructuringReserve $ 7,103,000us-gaap_RestructuringReserve   $ 0us-gaap_RestructuringReserve