Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans (Stock Options Activities) (Details)

v2.4.1.9
Equity and Long-Term Incentive Compensation Plans (Stock Options Activities) (Details) (USD $)
 3 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Stock Options Activity Rollforward        
Outstanding stock options as of June 30, 2014, shares     141,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Granted, shares     4,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod  
Exercised, shares     (113,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised  
Canceled/expired/forfeited, shares     (10,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod  
Outstanding stock options as of December 31, 2014 (all outstanding and all vested and exercisable), shares 22,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber   22,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Stock Options, Weighted Average Exercise Price Rollforward        
Outstanding stock options as of June 30, 2014, weighted-average exercise price     $ 40.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Stock options granted, weighted-average exercise price     $ 32.11us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice  
Stock options exercised, weighted-average exercise price     $ 40.67us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice  
Stock options canceled/expired/forfeited, weighted-average exercise price     $ 40.07us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice  
Outstanding stock options as of December 31, 2014 (all outstanding and all vested and exercisable), weighted-average exercise price $ 32.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice   $ 32.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Adjustments in period     4,245klac_SharebasedCompensationArrangementbySharebasedPaymentAwardAdjustmentsinPeriod  
Unrecognized stock-based compensation related to outstanding stock options $ 0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions   $ 0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions  
Weighted-average remaining contractual terms for total options outstanding under all plans and for total options vested and exercisable under all plans (in years)     0 years 4 months  
Aggregate intrinsic values for total options outstanding under all plans and for total options vested and exercisable under all plans 800,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1   800,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1  
Options Exercised [Abstract]        
Total intrinsic value of options exercised 441,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 3,431,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 3,919,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 11,314,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Total cash received from employees and non-employee Board members as a result of stock option exercises 540,000us-gaap_ProceedsFromStockOptionsExercised 15,684,000us-gaap_ProceedsFromStockOptionsExercised 5,217,000us-gaap_ProceedsFromStockOptionsExercised 56,731,000us-gaap_ProceedsFromStockOptionsExercised
Tax benefits realized by the Company in connection with these exercises $ 152,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised $ 1,061,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised $ 1,769,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised $ 3,678,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised