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

X
- Definition Stock Repurchase Program, Authorized Repurchase Amount, Increase During Period + References No definition available. + Details
Name: | klac_StockRepurchaseProgramAuthorizedRepurchaseAmountIncreaseDuringPeriod
Namespace Prefix: | klac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant