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EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($) | 12 Months Ended | 54 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2023
Defined Benefit Plan Disclosure |  |  |  |
Deferred compensation arrangement under the profit sharing and 401(K) programs, total expenses | $ 37,300,000 | $ 33,300,000 | $ 27,000,000 |
Matching Option One |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Employer matching contribution, percent of match |  |  |  | 50.00%
Employer matching contribution, employees contribution matched |  |  |  | $ 8,000
Matching Option Two |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Employer matching contribution, percent of match |  |  |  | 50.00%
Employer matching contribution, percent of employees' compensation |  |  |  | 5.00%
Employer matching contribution, additional percent of match |  |  |  | 25.00%

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- Definition Defined Contribution Plan, Employer Matching Contribution, Employees Contribution Matched + References No definition available. + Details
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Namespace Prefix: | klac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Additional + References No definition available. + Details
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Namespace Prefix: | klac_
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- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |