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Schedule of Outstanding Foreign Currency Forward Contracts (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 28, 2014
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Buy Contracts |
Derivative [Line Items] |
Derivatives Designated as Hedging Instruments | $ 42,164 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractOneMember
Derivatives Not Designated as Hedging Instruments | 60,790 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractOneMember
Buy Contracts | Euro |
Derivative [Line Items] |
Derivatives Designated as Hedging Instruments | 42,164 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = currency_EUR / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractOneMember
Derivatives Not Designated as Hedging Instruments | 13,776 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeByNatureAxis = currency_EUR / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractOneMember
Buy Contracts | Korea (South), Won |
Derivative [Line Items] |
Derivatives Not Designated as Hedging Instruments | 13,774 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeByNatureAxis = currency_KRW / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractOneMember
Buy Contracts | Taiwan Dollar |
Derivative [Line Items] |
Derivatives Not Designated as Hedging Instruments | 33,240 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeByNatureAxis = currency_TWD / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractOneMember
Sell Contracts |
Derivative [Line Items] |
Derivatives Designated as Hedging Instruments | 66,567 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractTwoMember
Derivatives Not Designated as Hedging Instruments | 48,150 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractTwoMember
Sell Contracts | Japanese Yen |
Derivative [Line Items] |
Derivatives Designated as Hedging Instruments | 66,567 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = currency_JPY / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractTwoMember
Derivatives Not Designated as Hedging Instruments | 46,806 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeByNatureAxis = currency_JPY / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractTwoMember
Sell Contracts | Swiss Francs |
Derivative [Line Items] |
Derivatives Not Designated as Hedging Instruments | $ 1,344 lrcx_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsContractValue / us-gaap_DerivativeByNatureAxis = currency_CHF / us-gaap_DerivativeInstrumentRiskAxis = lrcx_ContractTwoMember

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References No definition available. + Details
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