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 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
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Dec. 31, 2013
Receivables Sold Under Factoring Agreements        
Receivables sold under factoring agreements $ 47,598,000klac_ReceivablesSoldUnderFactoringAgreements $ 10,412,000klac_ReceivablesSoldUnderFactoringAgreements $ 73,218,000klac_ReceivablesSoldUnderFactoringAgreements $ 56,294,000klac_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 6 months) 4,246,000us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear   4,246,000us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear  
2016 7,482,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears   7,482,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears  
2017 5,321,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears   5,321,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears  
2018 3,688,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears   3,688,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears  
2019 1,781,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears   1,781,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears  
2020 and thereafter 1,781,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter   1,781,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter  
Total minimum lease payments 24,299,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue   24,299,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue  
Changes in Product Warranty Accrual        
Beginning balance 33,059,000us-gaap_ProductWarrantyAccrual 37,314,000us-gaap_ProductWarrantyAccrual 37,746,000us-gaap_ProductWarrantyAccrual 42,603,000us-gaap_ProductWarrantyAccrual
Accruals for warranties issued during the period 10,212,000us-gaap_ProductWarrantyAccrualWarrantiesIssued 15,988,000us-gaap_ProductWarrantyAccrualWarrantiesIssued 17,191,000us-gaap_ProductWarrantyAccrualWarrantiesIssued 25,296,000us-gaap_ProductWarrantyAccrualWarrantiesIssued
Changes in liability related to pre-existing warranties 704,000us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (2,424,000)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (766,000)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease (5,808,000)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease
Settlements made during the period (9,565,000)us-gaap_ProductWarrantyAccrualPayments (9,279,000)us-gaap_ProductWarrantyAccrualPayments (19,761,000)us-gaap_ProductWarrantyAccrualPayments (20,492,000)us-gaap_ProductWarrantyAccrualPayments
Ending balance 34,410,000us-gaap_ProductWarrantyAccrual 41,599,000us-gaap_ProductWarrantyAccrual 34,410,000us-gaap_ProductWarrantyAccrual 41,599,000us-gaap_ProductWarrantyAccrual
Commitments and Contingencies        
Operating leases, rent expense 2,300,000us-gaap_LeaseAndRentalExpense 2,300,000us-gaap_LeaseAndRentalExpense 4,600,000us-gaap_LeaseAndRentalExpense 4,400,000us-gaap_LeaseAndRentalExpense
Purchase commitments 312,800,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted   312,800,000us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted  
Majority outstanding purchase commitment, period due     12 months  
Cash-based long-term incentive plan, committed amount 137,800,000klac_LongTermIncentivePlanCommittedAmount   137,800,000klac_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     25,700,000klac_GuaranteeArrangementsToFundCustomsGuaranteesForVatAndLc  
Outstanding guarantee arrangements to fund customs guarantees for VAT and other operating requirements     $ 23,000,000klac_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