v3.25.2

Deferred Compensation Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 29, 2025	Jun. 30, 2024
Retirement Benefits [Abstract]
Payment of benefits, duration after opening of a deferral subaccount or upon retirement (at least)	3 years
Deferred compensation plan maximum distribution period	20 years
Liabilities of company to plan participants	$ 423.9	$ 385.5
Assets correlated to the deferred compensation obligation	$ 438.8	$ 393.5

Assets in the form of retail mutual funds and company owned life insurance policies that are correlated to the deferred compensation obligation.

+ References

No definition available.

+ Details

Name:	lrcx_AssetsCorrelatedToDeferredCompensationObligation
Namespace Prefix:	lrcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maximum period over which distributions from a deferred compensation plan account will be paid.

+ References

No definition available.

+ Details

Name:	lrcx_DeferredCompensationArrangementMaximumDistributionPeriod
Namespace Prefix:	lrcx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time an employee must wait after opening a deferred compensation account before payment may be made from that account.

+ References

No definition available.

+ Details

Name:	lrcx_DeferredCompensationPaymentWaitingPeriod
Namespace Prefix:	lrcx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 710
-SubTopic 10
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483043/710-10-30-1

+ Details

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

LAM RESEARCH CORP 10-K