KLA Corporation Annual report pursuant to Section 13 and 15(d)

Equity and Long-Term Incentive Compensation Plans - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands					6 Months Ended	12 Months Ended
	Jun. 01, 2018	May 03, 2018	Dec. 09, 2014	Nov. 19, 2014	Dec. 31, 2014	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Dividends Payable [Line Items]
Cash dividends declared (in dollars per share)						$ 2.52	$ 2.14	$ 2.08
Payments of dividends						$ 402,065	$ 343,993	$ 346,283
Dividends payable						9,571	13,772	19,556
Cash dividends paid						397,863	338,208	$ 323,836
Restricted stock unit, Performance-based and Service-based
Dividends Payable [Line Items]
Dividends payable						9,600
Regular Cash Dividend
Dividends Payable [Line Items]
Cash dividends declared (in dollars per share)		$ 0.75
Cash dividends paid per share (in dollars per share)	$ 0.75
Regular Cash Dividend \| Restricted stock unit, Performance-based and Service-based
Dividends Payable [Line Items]
Dividends payable						6,700	4,800
Regular Cash Dividend \| Additional Paid-in Capital
Dividends Payable [Line Items]
Payments of dividends						395,600	335,400
Special cash dividend
Dividends Payable [Line Items]
Cash dividends declared (in dollars per share)				$ 16.50
Cash dividends paid per share (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 [Line Items]
Dividends payable					$ 43,000	2,800	9,000
Cash dividends paid						$ 6,400	$ 8,600