XML 56 R44.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Detail) $ in Thousands | Dec. 27, 2015 USD ($)
--- | ---
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | $ 1,937,479
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (9,621)
Unrealized Losses 12 Months or Greater - Fair Value | 55,714
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (350)
Total - Fair Value | 1,993,193
Total - Gross Unrealized Loss | (9,971)
Municipal Notes and Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 256,272
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (313)
Unrealized Losses 12 Months or Greater - Fair Value | 1,816
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (4)
Total - Fair Value | 258,088
Total - Gross Unrealized Loss | (317)
U.S. Treasury & Agencies |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 347,138
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (2,051)
Total - Fair Value | 347,138
Total - Gross Unrealized Loss | (2,051)
Mutual Funds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 22,053
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (573)
Total - Fair Value | 22,053
Total - Gross Unrealized Loss | (573)
Government-Sponsored Enterprises |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 47,507
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (270)
Total - Fair Value | 47,507
Total - Gross Unrealized Loss | (270)
Foreign Government Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 39,895
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (229)
Total - Fair Value | 39,895
Total - Gross Unrealized Loss | (229)
Corporate Notes and Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 1,107,398
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (5,252)
Unrealized Losses 12 Months or Greater - Fair Value | 39,808
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (149)
Total - Fair Value | 1,147,206
Total - Gross Unrealized Loss | (5,401)
Mortgage Backed Securities — Residential |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 23,303
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (279)
Unrealized Losses 12 Months or Greater - Fair Value | 1,669
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (92)
Total - Fair Value | 24,972
Total - Gross Unrealized Loss | (371)
Mortgage Backed Securities — Commercial |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 93,913
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (654)
Unrealized Losses 12 Months or Greater - Fair Value | 12,421
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (105)
Total - Fair Value | 106,334
Total - Gross Unrealized Loss | $ (759)

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MunicipalNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=lrcx_MutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |