v2.4.0.6
Document and Entity Information
6 Months Ended
Dec. 23, 2012
Jan. 25, 2013
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 23, 2012  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Trading Symbol LRCX  
Entity Registrant Name LAM RESEARCH CORP  
Entity Central Index Key 0000707549  
Current Fiscal Year End Date --06-29  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   162,346,938