Commitments and Contingencies [Line Items]

No definition available.

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- Definition

Percentage of aggregate investment in leased property guaranteed under certain default circumstances.

+ References

No definition available.

+ Details

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- Definition

The aggregate value guarantee that the company made under the referenced lease agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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Balance Type:	credit
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- Definition

The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The noncurrent cash, cash equivalents and investments that is restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits classified as long-term; that is not expected to be released from such existing restrictions within one year of the balance sheet date or operating cycle, whichever is longer. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes noncurrent cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=lrcx_FremontAndLivermoreLeaseMember
Namespace Prefix:
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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 30, 2013
Commitments and Contingencies [Line Items]
Liabilities related to uncertain tax benefits	$ 202,900
Rental expense	15,000	$ 12,000	$ 14,000
Restricted collateral for leasing arrangements	170,969	$ 146,492
Standby Letters of Credit
Commitments and Contingencies [Line Items]
Guarantee Obligation Maximum Exposure	15,500
Operating Lease Cash Collateral
Commitments and Contingencies [Line Items]
Restricted collateral for leasing arrangements	132,500
Operating Lease Marketable Securities Collateral
Commitments and Contingencies [Line Items]
Restricted collateral for leasing arrangements	32,900
Operating Leases
Commitments and Contingencies [Line Items]
Operating Lease residual value of guarantee, maximum	$ 219,000
Maximum percentage of aggregate investment value guaranteed	100.00%
Guarantee Obligation Maximum Exposure	$ 249,900