2.4.0.81084 - Disclosure - Schedule of Changes in Product Warranty Reserves (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$1true3lrcx_ProductWarrantyLiabilityLineItemslrcx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false4us-gaap_StandardProductWarrantyAccrualus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse7016100070161USD$falsetruefalse2truefalsefalse4095100040951USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249
false23false4us-gaap_StandardProductWarrantyAccrualWarrantiesIssuedus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse7477900074779falsefalsefalse2truefalsefalse4509500045095falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
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false26false4us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecreaseus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse55940005594falsefalsefalse2truefalsefalse38580003858falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard product warranties (including adjustments related to changes in estimates). Does not include any Increase or Decrease in the liability for accruals related to extended product warranties.Reference 1: http://www.xbrl.org/2003/role/presentationRef
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