KLA Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Basis of Presentation (Policies)
Notes Tables
Notes Details

Stock-Based Compensation (Fair Value Assumptions) (Details)

v2.3.0.15

Stock-Based Compensation (Fair Value Assumptions) (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Jun. 30, 2011
ESPP maximum employee subscription rate	10.00%
Share-based compensation arrangement, discount from market price, lesser at offering period or purchase date	85.00%
ESPP maximum annual share replenishment			2.0
ESPP share replenishment In period			2.0
Number of ESPP shares available for future issuance	3.5
ESPP offering period, in months	6
Share-based Compensation Arrangement, Fair Value Assumptions and Methodology [Abstract]
Expected stock price volatility	33.00%	41.00%
Risk-free interest rate	0.10%	0.20%
Dividend yield	3.40%	3.70%
Expected life of options (in years)	0.50	0.50
Employee Stock Purchase Plan Additional Information [Abstract]
Tax benefits realized in connection with the disqualifying dispositions of shares purchased under the ESPP	$ 475	$ 356
Weighted average fair value per share based on Black-Scholes model	$ 9.16	$ 6.53

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Employee Stock Purchase Plan Additional Information [Abstract]

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Espp Maximum Annual Share Replenishment

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Espp Share Replenishment In Period

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Number Of Espp Shares Available For Future Issuance

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Stock Based Compensation Offering Period In Months

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Tax Benefits Realized From Espp

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Weighted Average Fair Value Per Share

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The discount rate from market value on offering date that participants pay for shares.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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