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

Stock Repurchase Program (Details) - USD ($) shares in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Sep. 17, 2019
Equity, Class of Treasury Stock
Total cost of repurchases	$ 280,593,000	$ 228,496,000	$ 242,401,000	$ 307,787,000	$ 509,089,000	$ 550,187,000
Other current liabilities
Equity, Class of Treasury Stock
Total cost of repurchases					$ 4,000,000.0
Common Stock and Capital in Excess of Par Value, Shares
Equity, Class of Treasury Stock
Number of shares of common stock repurchased (in shares)	1,690	1,659	2,556	2,781	3,349	5,337
Common Stock and Capital in Excess of Par Value, Shares \| Other current liabilities
Equity, Class of Treasury Stock
Number of shares of common stock repurchased (in shares)					23
New repurchase program
Equity, Class of Treasury Stock
Increase to shares authorized to be repurchased, amount							$ 1,000,000,000.00
Remaining shares authorized to be repurchased, amount	$ 1,350,000,000				$ 1,350,000,000