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Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
3 Months Ended 9 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Mar. 29, 2015
Mar. 30, 2014
Jun. 29, 2014
Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cost $ 202,734,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost   $ 202,734,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost   $ 158,439,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost  
Gross Unrealized Gains 0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain   0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain   0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain  
Gross Unrealized Losses 0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss   0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss   0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss  
Fair Value 202,734,000us-gaap_CashAndCashEquivalentsFairValueDisclosure   202,734,000us-gaap_CashAndCashEquivalentsFairValueDisclosure   158,439,000us-gaap_CashAndCashEquivalentsFairValueDisclosure  
Cash and cash equivalents 202,734,000us-gaap_CashAndCashEquivalentsAtCarryingValue 209,303,000us-gaap_CashAndCashEquivalentsAtCarryingValue 202,734,000us-gaap_CashAndCashEquivalentsAtCarryingValue 209,303,000us-gaap_CashAndCashEquivalentsAtCarryingValue 158,439,000us-gaap_CashAndCashEquivalentsAtCarryingValue 105,637,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Debt Instrument, Fair Value Disclosure 177,500,000us-gaap_DebtInstrumentFairValue   177,500,000us-gaap_DebtInstrumentFairValue      
Impairment of goodwill and intangible assets 57,895,000us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges 57,895,000us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges    
Cash [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cost 172,734,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  172,734,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  128,439,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
 
Gross Unrealized Gains 0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
 
Gross Unrealized Losses 0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
 
Fair Value 172,734,000us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  172,734,000us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  128,439,000us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
 
Cash and cash equivalents 172,734,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  172,734,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
  128,439,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CashMember
 
Money Market Funds [Member] | Level 1 [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Cost 30,000,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  30,000,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  30,000,000elx_CashAndCashEquivalentMarketableSecuritiesAmortizedCost
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
 
Gross Unrealized Gains 0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
 
Gross Unrealized Losses 0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  0us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
 
Fair Value 30,000,000us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  30,000,000us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  30,000,000us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
 
Cash and cash equivalents 30,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  30,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
  30,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FinancialInstrumentAxis
= us-gaap_MoneyMarketFundsMember
 
Goodwill [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of goodwill and intangible assets 35,290,000us-gaap_AssetImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
  35,290,000us-gaap_AssetImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_GoodwillMember
     
Finite-Lived Intangible Assets [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of goodwill and intangible assets $ 22,605,000us-gaap_AssetImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FiniteLivedIntangibleAssetsMember
  $ 22,605,000us-gaap_AssetImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FiniteLivedIntangibleAssetsMember