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
	Aug. 04, 2016	Nov. 19, 2014	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Dec. 31, 2014
Dividends Payable
Cash dividends declared (in dollars per share)			$ 0.52	$ 0.52
Payment of dividends			$ 89,313	$ 101,674
Dividends payable			12,045	20,892
Restricted Stock Unit, Performance-Based and Service Based
Dividends Payable
Dividends payable			12,000
Regular cash dividend
Dividends Payable
Cash dividends declared (in dollars per share)	$ 0.52
Regular cash dividend \| Restricted Stock Unit, Performance-Based and Service Based
Dividends Payable
Dividends payable			2,700		$ 2,700
Regular cash dividend \| Additional paid-in capital
Dividends Payable
Payment of dividends			81,600	81,600
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			9,300		$ 16,900	$ 43,000
Cash dividends paid			$ 7,700	$ 20,000