Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v2.4.1.9
Commitments and Contingencies (Details) (USD $)
 3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
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Mar. 31, 2014
Receivables Sold Under Factoring Agreements        
Receivables sold under factoring agreements $ 15,614,000klac_ReceivablesSoldUnderFactoringAgreements $ 27,195,000klac_ReceivablesSoldUnderFactoringAgreements $ 88,832,000klac_ReceivablesSoldUnderFactoringAgreements $ 83,489,000klac_ReceivablesSoldUnderFactoringAgreements
Proceeds from sales of LCs 0us-gaap_ProceedsFromLinesOfCredit 0us-gaap_ProceedsFromLinesOfCredit 6,920,000us-gaap_ProceedsFromLinesOfCredit 0us-gaap_ProceedsFromLinesOfCredit
Operating Leases, Future Minimum Payments Due [Abstract]        
2015 (remaining 3 months) 2,149,000us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear   2,149,000us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear  
2016 7,752,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears   7,752,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears  
2017 5,508,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears   5,508,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears  
2018 3,851,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears   3,851,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears  
2019 1,788,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears   1,788,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears  
2020 and thereafter 1,753,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter   1,753,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter  
Total minimum lease payments 22,801,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue   22,801,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue  
Changes in Product Warranty Accrual        
Beginning balance 34,410,000us-gaap_ProductWarrantyAccrual 41,599,000us-gaap_ProductWarrantyAccrual 37,746,000us-gaap_ProductWarrantyAccrual 42,603,000us-gaap_ProductWarrantyAccrual
Accruals for warranties issued during the period 11,289,000us-gaap_ProductWarrantyAccrualWarrantiesIssued 10,799,000us-gaap_ProductWarrantyAccrualWarrantiesIssued 28,480,000us-gaap_ProductWarrantyAccrualWarrantiesIssued 36,096,000us-gaap_ProductWarrantyAccrualWarrantiesIssued
Changes in liability related to pre-existing warranties 76,000us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (841,000)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (690,000)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (6,650,000)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Settlements made during the period (10,346,000)us-gaap_ProductWarrantyAccrualPayments (10,408,000)us-gaap_ProductWarrantyAccrualPayments (30,107,000)us-gaap_ProductWarrantyAccrualPayments (30,900,000)us-gaap_ProductWarrantyAccrualPayments
Ending balance 35,429,000us-gaap_ProductWarrantyAccrual 41,149,000us-gaap_ProductWarrantyAccrual 35,429,000us-gaap_ProductWarrantyAccrual 41,149,000us-gaap_ProductWarrantyAccrual
Commitments and Contingencies        
Operating leases, rent expense 2,200,000us-gaap_LeaseAndRentalExpense 2,100,000us-gaap_LeaseAndRentalExpense 6,800,000us-gaap_LeaseAndRentalExpense 6,500,000us-gaap_LeaseAndRentalExpense
Purchase commitments 300,800,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted   300,800,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted  
Majority outstanding purchase commitment, period due     12 months  
Cash-based long-term incentive plan, committed amount 133,700,000klac_LongTermIncentivePlanCommittedAmount   133,700,000klac_LongTermIncentivePlanCommittedAmount  
Standard warranty coverage in hours per week     40klac_StandardWarrantyCoverageHoursPerWeek  
Standard warranty coverage period     12 months  
Guarantee arrangements to fund customs guarantees for VAT and other operating requirements     21,600,000klac_GuaranteeArrangementsToFundCustomsGuaranteesForVatAndLc  
Outstanding guarantee arrangements to fund customs guarantees for VAT and other operating requirements     $ 18,400,000klac_OutstandingGuaranteeArrangementsToFundCustomsGuaranteesForVatAndLc  
Cash Long-Term Incentive Plan        
Commitments and Contingencies        
Cash long-term incentive plan, number of equal vesting installments     4klac_DeferredCompensationArrangementWithIndividualNumberOfEqualVestingInstallments
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= klac_CashLongTermIncentivePlanMember 		 
Cash long-term incentive plan, percentage of equal vesting installments     25.00%klac_DeferredCompensationArrangementWithIndividualPercentageOfEqualVestingInstallments
/ us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis
= klac_CashLongTermIncentivePlanMember 		 
Cash long-term incentive plan, vesting period     4 years