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Intangible Assets - Additional Information (Detail) (USD $)
0 Months Ended 3 Months Ended 12 Months Ended
Sep. 03, 2014
Oct. 31, 2014
Oct. 31, 2014
Oct. 25, 2013
Oct. 26, 2012
Goodwill And Intangible Assets Disclosure [Abstract]          
Loss on assets held for sale $ 49,500,000us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalNetOfTax $ 49,500,000us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalNetOfTax $ 49,472,000us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalNetOfTax $ 0us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalNetOfTax $ 0us-gaap_DiscontinuedOperationProvisionForLossGainOnDisposalNetOfTax
Estimated net Loss against intangibles 12,900,000esl_EstimatedNetLossRecordedAgainstIntangiblesAttributableToDisposalGroup        
Amortization of intangible assets     49,628,000us-gaap_AmortizationOfIntangibleAssets 46,361,000us-gaap_AmortizationOfIntangibleAssets 44,976,000us-gaap_AmortizationOfIntangibleAssets
Amortization of intangible assets discontinued operations     $ 8,813,000us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization $ 8,637,000us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization $ 8,547,000us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization