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Components of Other Expense, Net - Additional Information (Detail) (Novellus Systems Incorporated, USD $)
In Millions, unless otherwise specified
9 Months Ended
Mar. 29, 2015
Novellus Systems Incorporated
 
Component Of Other Expense Income Nonoperating [Line Items]  
Net pre-tax gain associated with divestiture $ 7.3us-gaap_OtherExpenses
/ us-gaap_BusinessAcquisitionAxis
= lrcx_NovellusSystemsIncorporatedMember