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

Stock Repurchase Program (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended
	Oct. 23, 2014	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jul. 08, 2014
Equity, Class of Treasury Stock [Line Items]
Increase in authorized shares to be repurchased						13,000,000
Number of additional shares authorized to be repurchased	3,600,000
Authorized shares to be repurchased		12,100,000		12,100,000
Number of shares of common stock repurchased		2,644,000us-gaap_TreasuryStockSharesAcquired	930,000us-gaap_TreasuryStockSharesAcquired	6,506,000us-gaap_TreasuryStockSharesAcquired	2,927,000us-gaap_TreasuryStockSharesAcquired
Total cost of repurchases		$ 168,943	$ 59,880	$ 447,892	$ 180,686
Other Current Liabilities
Equity, Class of Treasury Stock [Line Items]
Number of shares of common stock repurchased				218,600
Total cost of repurchases				$ 12,900