2.4.0.81067 - Disclosure - Equity Based Compensation Plans - Additional Information (Detail)truefalseIn Millions, except Share data, unless otherwise specifiedfalse1falseUSDfalsefalseeol_PE5807----1310-K0007_STD_371_20130630_0_713115x740241http://www.sec.gov/CIK0000707549duration2012-06-25T00:00:002013-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instanceshares0pureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$2falsefalsefalseeol_PE5807----1310-K0007_STD_0_20120624_0_713115x740241http://www.sec.gov/CIK0000707549instant2012-06-24T00:00:000001-01-01T00:00:00sharesStandardhttp://www.xbrl.org/2003/instanceshares03falsefalsefalseeol_PE5807----1310-K0007_STD_0_20110626_0_713115x740241http://www.sec.gov/CIK0000707549instant2011-06-26T00:00:000001-01-01T00:00:00sharesStandardhttp://www.xbrl.org/2003/instanceshares01true3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false4lrcx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndRestrictedStockUnitsVestingPeriodMaximumlrcx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:positiveIntegerItemTypepositiveintegerShare-based compensation arrangement by share-based payment award, options and restricted stock units vesting period, maximum.No definition available.false2563false4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptionsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse74000007.4USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUnrecognized cost of unvested options awarded to employees as compensation.No definition available.false24false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse2falsetruefalseeol_PE5807----1310-K0007_STD_371_20130630_0_713879x708980http://www.sec.gov/CIK0000707549duration2012-06-25T00:00:002013-06-30T00:00:00falsefalseStock Optionsus-gaap_PlanNameAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EmployeeStockOptionMemberus-gaap_PlanNameAxisexplicitMembernanafalse05true3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse06false4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse001 year 4 months 24 daysfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaWeighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false07false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse3falsetruefalseeol_PE5807----1310-K0007_STD_0_20130630_0_713879x739989http://www.sec.gov/CIK0000707549instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseExisting Stock Plansus-gaap_PlanNameAxisxbrldihttp://xbrl.org/2006/xbrldilrcx_ExistingStockPlansMemberus-gaap_PlanNameAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instanceshares0nanafalse08true3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse09false4lrcx_OptionsAndRestrictedStockUnitsIssuedAndOutstandingUnderStockPlanlrcx_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse74127197412719falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesOptions And Restricted Stock Units Issued And Outstanding Under Stock PlanNo definition available.false110false4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1330271213302712falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesThe difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false111false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falseUSDtruefalseeol_PE5807----1310-K0007_STD_371_20130630_0_713115x740241http://www.sec.gov/CIK0000707549duration2012-06-25T00:00:002013-06-30T00:00:00falsefalseEmployee Stock Purchase Planus-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldilrcx_EmployeeStockPurchasePlanMemberus-gaap_AwardTypeAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instanceshares0pureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse012true3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse013false4lrcx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentOfMarketPricelrcx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.850.85falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsenum:percentItemTypepurePercentage of market price at which ESPP allows employees to purchase stock. Price is based on the lower of market price on the first or last day of purchase period.No definition available.false014false4lrcx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAdditionalNumberOfSharesAuthorizedlrcx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse20000002000000falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesShare Based Compensation Arrangement By Share Based Payment Award Additional Number Of Shares AuthorizedNo definition available.false115false4lrcx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantAsPercentageOfCompanySOutstandingCommonStocklrcx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.0150.015falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsenum:percentItemTypepureShare Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant As Percentage Of Company S Outstanding Common StockNo definition available.false016false4lrcx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAvailableForAdditionalGrantlrcx_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00falsefalsefalse2truefalsefalse18000001800000falsefalsefalse3truefalsefalse19000001900000falsefalsefalsexbrli:sharesItemTypesharesShare-based Compensation Arrangement by Share-based Payment Award, Options, Available for Additional GrantNo definition available.false117false4us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlansus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse10723961072396falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesNumber of shares issued during the period as a result of an employee stock purchase plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5
false118false4lrcx_NumberOfSharesAvailableForPurchaseUnderEmployeesStockPurchasePlanlrcx_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse95742079574207falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesNumber Of Shares Available For Purchase Under Employees Stock Purchase Plan.No definition available.false119false4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse002 monthsfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaWeighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false020false4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse22000002.2USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUnrecognized cost of unvested share-based compensation awards.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false221false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse7falseUSDtruefalseeol_PE5807----1310-K0007_STD_371_20130630_0_713115x715834http://www.sec.gov/CIK0000707549duration2012-06-25T00:00:002013-06-30T00:00:00falsefalseRestricted Stock Units (RSUs)us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RestrictedStockUnitsRSUMemberus-gaap_AwardTypeAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse022true3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse023false4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse001 year 10 months 24 daysfalsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaWeighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
false024false4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse126300000126.3USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUnrecognized cost of unvested share-based compensation awards.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
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