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Stock Repurchase Program - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 27, 2015 | Apr. 29, 2014
Stock Repurchase Program [Line Items] |  |
Net shares of settlements to cover tax withholding obligations | 208,624 |
Amount paid for shares under net share settlements | $ 15.3 |
Maximum |  |
Stock Repurchase Program [Line Items] |  |
Authorized repurchase of Company common stock |  | $ 850.0

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- Definition Stock Repurchase Program [Line Items] + References No definition available. + Details
Name: | lrcx_StockRepurchaseProgramLineItems
Namespace Prefix: | lrcx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References No definition available. + Details
Name: | us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + References No definition available. + Details
Name: | us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |