Annual report pursuant to Section 13 and 15(d)

DEI Document

v2.4.0.6
DEI Document (USD $)
12 Months Ended
Jun. 30, 2012
Jul. 19, 2012
Dec. 31, 2011
Entity Information [Line Items]
Document Type 10-K
Amendment Flag false
Document Period End Date Jun. 30, 2012
Document Fiscal Year Focus 2012
Document Fiscal Period Focus Q4
Entity Registrant Name KLA TENCOR CORP
Entity Central Index Key 0000319201
Entity Filer Category Large Accelerated Filer
Current Fiscal Year End Date --06-30
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Well-known Seasoned Issuer Yes
Trading Symbol klac
Entity Common Stock, Shares Outstanding 166,516,316
Entity Public Float $ 8,000,000,000
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