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

Equity and Long-Term Incentive Compensation Plans - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Nov. 02, 2016	Nov. 19, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016	Dec. 31, 2014
Dividends Payable
Cash dividends declared (in dollars per share)			$ 0.54	$ 0.52	$ 1.06	$ 1.04
Payment of dividends					$ 173,842	$ 183,054
Dividends payable			$ 12,763	$ 20,284	12,763	20,284
Restricted stock unit, Performance-based and Service-based
Dividends Payable
Dividends payable			12,700		12,700
Regular cash dividend
Dividends Payable
Cash dividends declared (in dollars per share)	$ 0.54
Regular cash dividend \| Restricted stock unit, Performance-based and Service-based
Dividends Payable
Dividends payable			3,300		3,300		$ 2,700
Regular cash dividend \| Additional paid-in capital
Dividends Payable
Payment of dividends			84,500	80,800	166100年	162,500
Special cash dividend
Dividends Payable
Cash dividends declared (in dollars per share)		$ 16.50
Cash dividends paid		$ 2,760,000
Special cash dividend \| Restricted stock unit, Performance-based and Service-based
Dividends Payable
Dividends payable			$ 9,400		9,400		$ 16,900	$ 43,000
Cash dividends paid				$ 600	$ 7,700	$ 20,500