Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details)

v2.4.1.9
Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Components of purchased intangible assets          
Gross Carrying Amount $ 291,479,000us-gaap_FiniteLivedIntangibleAssetsGross   $ 291,479,000us-gaap_FiniteLivedIntangibleAssetsGross   291,479,000us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization and Impairment 275,931,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization   275,931,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization   263,782,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Total 15,548,000us-gaap_FiniteLivedIntangibleAssetsNet   15,548,000us-gaap_FiniteLivedIntangibleAssetsNet   27,697,000us-gaap_FiniteLivedIntangibleAssetsNet
Intangible assets, amortization expense 4,000,000us-gaap_AmortizationOfIntangibleAssets 3,500,000us-gaap_AmortizationOfIntangibleAssets 12,100,000us-gaap_AmortizationOfIntangibleAssets 11,900,000us-gaap_AmortizationOfIntangibleAssets  
Existing technology          
Components of purchased intangible assets          
Gross Carrying Amount 141,659,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
  141,659,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
  141,659,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
Accumulated Amortization and Impairment 132,668,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
  132,668,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
  126,567,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
Total 8,991,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
  8,991,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
  15,092,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_ExistingTechnologyMember
Existing technology | Minimum          
Components of purchased intangible assets          
Range of Useful Lives     4 years   4 years
Existing technology | Maximum          
Components of purchased intangible assets          
Range of Useful Lives     7 years   7 years
Patents          
Components of purchased intangible assets          
Gross Carrying Amount 57,648,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
  57,648,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
  57,648,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
Accumulated Amortization and Impairment 56,348,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
  56,348,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
  54,398,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
Total 1,300,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
  1,300,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
  3,250,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
Patents | Minimum          
Components of purchased intangible assets          
Range of Useful Lives     6 years   6 years
Patents | Maximum          
Components of purchased intangible assets          
Range of Useful Lives     13 years   13 years
Trade name/Trademark          
Components of purchased intangible assets          
Gross Carrying Amount 19,893,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
  19,893,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
  19,893,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
Accumulated Amortization and Impairment 18,538,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
  18,538,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
  17,427,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
Total 1,355,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
  1,355,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
  2,466,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_TradeNameTrademarkMember
Trade name/Trademark | Minimum          
Components of purchased intangible assets          
Range of Useful Lives     4 years   4 years
Trade name/Trademark | Maximum          
Components of purchased intangible assets          
Range of Useful Lives     10 years   10 years
Customer relationships          
Components of purchased intangible assets          
Gross Carrying Amount 54,980,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
  54,980,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
  54,980,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Accumulated Amortization and Impairment 51,078,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
  51,078,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
  48,915,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Total 3,902,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
  3,902,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
  6,065,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Customer relationships | Minimum          
Components of purchased intangible assets          
Range of Useful Lives     6 years   6 years
Customer relationships | Maximum          
Components of purchased intangible assets          
Range of Useful Lives     7 years   7 years
Other          
Components of purchased intangible assets          
Gross Carrying Amount 17,299,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
  17,299,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
  17,299,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
Accumulated Amortization and Impairment 17,299,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
  17,299,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
  16,475,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
Total $ 0us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
  $ 0us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
  824,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= klac_OtherIntangibleMember
Other | Minimum          
Components of purchased intangible assets          
Range of Useful Lives     0 years   0 years
Other | Maximum          
Components of purchased intangible assets          
Range of Useful Lives     1 year   1 year