No definition available.

Name:	lrcx_LeaseExpirationMonthAndYear
Namespace Prefix:	lrcx_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

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

No definition available.

Name:	lrcx_MaximumPercentageOfAggregateInvestmentValueGuaranteed
Namespace Prefix:	lrcx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number Of Operating Leases

No definition available.

Name:	lrcx_NumberOfOperatingLeases
Namespace Prefix:	lrcx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Operating lease purchase option notification period.

No definition available.

Name:	lrcx_OperatingLeasePurchaseOptionNotificationPeriod
Namespace Prefix:	lrcx_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration

Operating Lease Residual Value Guarantee

No definition available.

Name:	lrcx_OperatingLeaseResidualValueGuarantee
Namespace Prefix:	lrcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Operating lease residual value guarantee liability balance

No definition available.

Name:	lrcx_OperatingLeaseResidualValueGuaranteeLiability
Namespace Prefix:	lrcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Operating Lease Term Period

No definition available.

Name:	lrcx_OperatingLeaseTermPeriod
Namespace Prefix:	lrcx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Restructuring Charges Reassessment of Operating Lease Residual Value Guarantee

No definition available.

Name:	lrcx_RestructuringChargesReassessmentOfOperatingLeaseResidualValueGuarantee
Namespace Prefix:	lrcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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.

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

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

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

Name:	us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

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