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-Topic 718
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Topic 718
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-Section 50
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-Publisher FASB
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-Topic 718
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false316true4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse017false5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberus-gaap_truenainstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse43314784331478falsefalsefalse2truefalsefalse23313402331340falsefalsefalse3truefalsefalse27407622740762falsefalsefalsexbrli:sharesItemTypesharesThe number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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false118false5lrcx_RestrictedStockUnitsAssumedlrcx_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse12918081291808falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesRestricted stock units assumed in connection with acquisitionNo definition available.false119false5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse25636702563670falsefalsefalse2truefalsefalse23362832336283falsefalsefalse3truefalsefalse922210922210falsefalsefalsexbrli:sharesItemTypesharesThe number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 718
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false120false5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-299079-299079falsefalsefalse2truefalsefalse-120070-120070falsefalsefalse3truefalsefalse-154185-154185falsefalsefalsexbrli:sharesItemTypesharesThe number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false121false5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1754273-1754273falsefalsefalse2truefalsefalse-1507883-1507883falsefalsefalse3truefalsefalse-1177447-1177447falsefalsefalsexbrli:sharesItemTypesharesThe number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false122false5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberus-gaap_truenainstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse48417964841796falsefalsefalse2truefalsefalse43314784331478falsefalsefalse3truefalsefalse23313402331340falsefalsefalsexbrli:sharesItemTypesharesThe number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Topic 718
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false325false5lrcx_RestrictedStockUnitsAssumedWeightedAverageFairValueAtGrantlrcx_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse35.9935.99USD$falsetruefalse3falsefalsefalse00falsefalsefalsenum:perShareItemTypedecimalWeighted average fair value at grant of restricted stock units assumed in connection with acquisitionNo definition available.false326false5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValueus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse38.7638.76USD$falsetruefalse2truefalsefalse41.2341.23USD$falsetruefalse3truefalsefalse50.1150.11USD$falsetruefalsenum:perShareItemTypedecimalThe weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
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