LONG-TERM DEBT AND OTHER BORROWINGS - Convertible Senior Notes (Details) - USD ($)	1 Months Ended
Jun. 30, 2012	May 31, 2011
Fixed-rate 1.25% Convertible Notes Due May 15, 2018 (2018 Notes)
Debt Instrument [Line Items]
Principal amount		$ 450,000,000
Senior notes interest rate (percentage)		1.25%
Fixed-rate 2.625% Convertible Notes Due May 15, 2041 (2041 Notes)
Debt Instrument [Line Items]
Principal amount	$ 700,000,000
Senior notes interest rate (percentage)	2.625%
Fixed-rate 2.625% Convertible Notes Due May 15, 2041 (2041 Notes) \| Maximum
Debt Instrument [Line Items]
Maximum amount of contingent interest rate (percentage)	0.60%

Maximum additional incremental interest (illustrated in annual percentage rate) that could, contingent upon certain circumstances noted in the referenced debt agreement, be payable upon the outstanding principal on said note.

No definition available.

+ Details

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Namespace Prefix:	lrcx_
Data Type:	num:percentItemType
Balance Type:	na
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=34725769&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=6451184&loc=d3e28551-108399

+ Details

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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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Namespace Prefix:	us-gaap_
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

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Balance Type:	na
Period Type:	duration

- Details

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- Details

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Namespace Prefix:
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- Details

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