2.4.0.81085 - Disclosure - Income Loss Before Income Taxes (Detail)truefalseIn Thousands, unless otherwise specifiedfalse1falseUSDfalsefalse$eol_PE5807----1310-K0007_STD_371_20130630_0http://www.sec.gov/CIK0000707549duration2012-06-25T00:00:002013-06-30T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falseUSDfalsefalse$eol_PE5807----1310-K0007_STD_364_20120624_0http://www.sec.gov/CIK0000707549duration2011-06-27T00:00:002012-06-24T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falseUSDfalsefalse$eol_PE5807----1310-K0007_STD_364_20110626_0http://www.sec.gov/CIK0000707549duration2010-06-28T00:00:002011-06-26T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true3lrcx_ScheduleOfIncomeBeforeIncomeTaxLineItemslrcx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomesticus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-46392000-46392USD$falsetruefalse2truefalsefalse-6950000-6950USD$falsetruefalse3truefalsefalse159250000159250USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690
false23false4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeignus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse113050000113050falsefalsefalse2truefalsefalse211368000211368falsefalsefalse3truefalsefalse641626000641626falsefalsefalsexbrli:monetaryItemTypemonetaryThe portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690
false24false4us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse6665800066658USD$falsetruefalse2truefalsefalse204418000204418USD$falsetruefalse3truefalsefalse800876000800876USD$falsetruefalsexbrli:monetaryItemTypemonetarySum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690
true2falseIncome Loss Before Income Taxes (Detail) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.lamresearch.com/taxonomy/role/DisclosureIncomeLossBeforeIncomeTaxes34
