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Components of Other Expense, Net - Additional Information (Detail) (Novellus Systems Incorporated, USD $) In Millions, unless otherwise specified | 6 Months Ended
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Dec. 28, 2014
Novellus Systems Incorporated |
Component Of Other Expense Income Nonoperating [Line Items] |
Net pre-tax gain associated with divestiture | $ 7.3 us-gaap_OtherExpenses / us-gaap_BusinessAcquisitionAxis = lrcx_NovellusSystemsIncorporatedMember

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- Details
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Namespace Prefix: | lrcx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents a sum total of expenses not separately reflected on the income statement for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 7 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4,6) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration