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v3.19.1

Basis of Presentation - Revenue Recognition (Details) | 9 Months Ended
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Mar. 31, 2019
Product Warranty Liability [Line Items] |
Standard warranty coverage period | 12 months
Minimum |
Product Warranty Liability [Line Items] |
Standard warranty coverage period | 6 months
Maximum |
Product Warranty Liability [Line Items] |
Standard warranty coverage period | 12 months

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- Definition Standard Warranty Coverage + References No definition available. + Details
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Namespace Prefix: | klac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |