STOCK REPURCHASE PROGRAM - Additional Information (Details) $ in Millions	3 Months Ended
Sep. 30, 2023 USD ($)
Equity [Abstract]
Increase of stock repurchase program authorized amount	$ 2,000
Remaining shares authorized to be repurchased, amount	$ 3,450

Stock Repurchase Program, Authorized Repurchase Amount, Increase During Period

No definition available.

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Namespace Prefix:	klac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration