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Debt (Debt Issuances - Credit Facility) (Details) (USD $)
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6 Months Ended |
1 Months Ended |
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Dec. 31, 2014
quarter
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Nov. 30, 2014
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| Term loans and revolving credit facility |
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| Debt Instrument [Line Items] |
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| Number of consecutive quarters required to maintain ratio |
4klac_DebtInstrumentCovenantComplianceNumberofConsecutiveQuarters
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Minimum interest expense coverage ratio |
3.50klac_DebtInstrumentCovenantComplianceMinimumInterestExpenseCoverageRatio
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | Covenant compliance period, fiscal quarter ending December 31, 2014 |
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| Debt Instrument [Line Items] |
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| Number of consecutive quarters required to maintain ratio |
4klac_DebtInstrumentCovenantComplianceNumberofConsecutiveQuarters
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod1Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Maximum leverage ratio |
4.50klac_DebtInstrumentCovenantComplianceMaximumLeverageRatio
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod1Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | Covenant compliance period, fiscal quarters ending March 31, 2015 and June 30, 2015 |
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| Debt Instrument [Line Items] |
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| Maximum leverage ratio |
4.25klac_DebtInstrumentCovenantComplianceMaximumLeverageRatio
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod2Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | Covenant compliance period, fiscal quarters ending September 30, 2015 and December 31, 2015 |
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| Debt Instrument [Line Items] |
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| Maximum leverage ratio |
4.00klac_DebtInstrumentCovenantComplianceMaximumLeverageRatio
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod3Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | Covenant compliance period, fiscal quarters ending March 31, 2016 through September 30, 2016 |
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| Debt Instrument [Line Items] |
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| Maximum leverage ratio |
3.75klac_DebtInstrumentCovenantComplianceMaximumLeverageRatio
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod4Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | Covenant compliance period, fiscal quarters ending December 31, 2016 through March 31, 2017 |
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| Debt Instrument [Line Items] |
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| Maximum leverage ratio |
3.50klac_DebtInstrumentCovenantComplianceMaximumLeverageRatio
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod5Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | Covenant compliance period, thereafter |
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| Debt Instrument [Line Items] |
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| Maximum leverage ratio |
3.00klac_DebtInstrumentCovenantComplianceMaximumLeverageRatio
/ klac_CovenantCompliancePeriodAxis
= klac_CovenantCompliancePeriod6Member
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
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| Term loans and revolving credit facility | LIBOR |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
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| Term loans and revolving credit facility | LIBOR | Minimum |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
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| Term loans and revolving credit facility | LIBOR | Maximum |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= klac_TermLoanandRevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
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| Term Loans |
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| Debt Instrument [Line Items] |
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| Principal amount |
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$ 750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
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| Term of debt instrument |
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5 years
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| Term Loans | Principal payment period, fiscal quarters ending March 31, 2015 - December 31, 2016 |
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| Debt Instrument [Line Items] |
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| Periodic principal payment |
9,375,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodOneMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
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| Term Loans | Principal payment period, fiscal quarters ending March 31, 2017 - December 31, 2017 |
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| Debt Instrument [Line Items] |
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| Periodic principal payment |
14,063,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodTwoMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
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| Term Loans | Principal payment period, fiscal quarters ending March 31, 2018 - December 31, 2019 |
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| Debt Instrument [Line Items] |
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| Periodic principal payment |
18,750,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodThreeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
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| Term Loans | December 31, 2019 |
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| Debt Instrument [Line Items] |
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| Periodic principal payment |
487,500,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodFourMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
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| Revolving credit facility |
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| Debt Instrument [Line Items] |
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| Maximum borrowing capacity |
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$ 500,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Annual commitment fee on daily undrawn balance of revolving credit facility |
0.15%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
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| Revolving credit facility | Minimum |
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| Debt Instrument [Line Items] |
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| Annual commitment fee on daily undrawn balance of revolving credit facility |
0.10%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Revolving credit facility | Maximum |
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| Debt Instrument [Line Items] |
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| Annual commitment fee on daily undrawn balance of revolving credit facility |
0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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