KLA Corporation Quarterly report pursuant to Section 13 or 15(d)

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

Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Components of purchased intangible assets
Gross Carrying Amount	$ 216,532		$ 216,532		$ 216,532
Accumulated Amortization and Impairment	214,494		214,494		212,201
Total	2,038		2,038		4,331
Other intangible assets, amortization expense	500	$ 1,300	2,300	$ 6,300
Existing technology
Components of purchased intangible assets
Gross Carrying Amount	141,659		141,659		141,659
Accumulated Amortization and Impairment	139,661		139,661		138,160
Total	1,998		$ 1,998		3,499
Existing technology \| Minimum
Components of purchased intangible assets
Range of Useful Lives (in years)			4 years
Existing technology \| Maximum
Components of purchased intangible assets
Range of Useful Lives (in years)			7 years
Trade name/Trademark
Components of purchased intangible assets
Gross Carrying Amount	19,893		$ 19,893		19,893
Accumulated Amortization and Impairment	19,893		19,893		19,743
Total	0		$ 0		150
Trade name/Trademark \| Minimum
Components of purchased intangible assets
Range of Useful Lives (in years)			4 years
Trade name/Trademark \| Maximum
Components of purchased intangible assets
Range of Useful Lives (in years)			10 years
Customer relationships
Components of purchased intangible assets
Gross Carrying Amount	54,980		$ 54,980		54,980
Accumulated Amortization and Impairment	54,940		54,940		54,298
Total	$ 40		$ 40		$ 682
Customer relationships \| Minimum
Components of purchased intangible assets
Range of Useful Lives (in years)			6 years
Customer relationships \| Maximum
Components of purchased intangible assets
Range of Useful Lives (in years)			7 years