2.4.0.81070 - Disclosure - Recognized or Realized Equity Based Compensation Expenses and Benefits (Detail)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$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$2false USDfalsefalse$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$3false USDfalsefalse$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$1true 3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false 4us-gaap_AllocatedShareBasedCompensationExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse9930000099.3USD$falsetruefalse2truefalsefalse8160000081.6USD$falsetruefalse3truefalsefalse5300000053.0USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F false23false 4us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpenseus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1760000017.6falsefalsefalse2truefalsefalse1220000012.2falsefalsefalse3truefalsefalse86000008.6falsefalsefalsexbrli:monetaryItemTypemonetaryThe total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false24false 4us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptionsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2160000021.6USD$falsetruefalse2truefalsefalse1180000011.8USD$falsetruefalse3truefalsefalse1630000016.3USD$falsetruefalsexbrli:monetaryItemTypemonetaryDisclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false2falseRecognized or Realized Equity Based Compensation Expenses and Benefits (Detail) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.lamresearch.com/taxonomy/role/DisclosureRecognizedOrRealizedEquityBasedCompensationExpensesAndBenefits34