Quarterly report pursuant to Section 13 or 15(d)

Business Combinations - Pro Forma Information (Details)

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Business Combinations - Pro Forma Information (Details) - Orbotech and three privately-held companies - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Business Acquisition    
Revenues $ 1,372,783 $ 2,721,012
Net income attributable to KLA $ 405,693 $ 783,112