Debt Instrument, Covenant, Redemption Price, Percentage

No definition available.

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Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=lrcx_ThreePointEightZeroPercentSeniorNotesDueTwoThousandTwentyFiveMember
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- Details

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LONG-TERM DEBT AND OTHER BORROWINGS - Senior Notes (Details) - Senior notes - USD ($)		3 Months Ended
	Mar. 12, 2015	Sep. 23, 2018	Jun. 07, 2016
Debt Instrument [Line Items]
Debt instrument, redemption price percent	100.00%
2020 Notes
Debt Instrument [Line Items]
Principal amount	$ 500,000,000
Senior notes interest rate	2.75%	2.75%
2025 Notes
Debt Instrument [Line Items]
Principal amount	$ 500,000,000
Senior notes interest rate	3.80%	3.80%
Debt instrument, redemption price upon occurrence of certain events, percent	101.00%
2021 Notes
Debt Instrument [Line Items]
Principal amount			$ 800,000,000
Senior notes interest rate		2.80%	2.80%
Debt instrument, redemption price percent		100.00%
Debt instrument, redemption price upon occurrence of certain events, percent		101.00%