KLA Corporation Annual report pursuant to Section 13 and 15(d)

EQUITY, LONG-TERM INCENTIVE COMPENSATION PLANS AND NON-CONTROLLING INTEREST - Equity Incentive Plans General Information (Details)

EQUITY, LONG-TERM INCENTIVE COMPENSATION PLANS AND NON-CONTROLLING INTEREST - Equity Incentive Plans General Information (Details) shares in Thousands	12 Months Ended
	Jun. 30, 2020 $ / shares shares	Jun. 30, 2019 shares	Jun. 30, 2018 shares	Jun. 30, 2020 shares	Mar. 31, 2019 shares
Total Shares Available for Grant under the Company's equity incentive plans:
Balance as of beginning of period (in shares)	11,613	3,680	4,710
Plan shares increased (in shares)		12,000
Plan shares expired (1998 Director Plan) (in shares)		(1,660)
Balance as of end of period (in shares)	10,760	11,613	3,680
Maximum number of shares available for grant (in shares)	10,760	11,613	3,680	10,760
Restricted stock unit, Performance-based and Service-based
Total Shares Available for Grant under the Company's equity incentive plans:
Measurement price (in dollars per share) \| $ / shares	$ 116.39
Service period	5 years
Restricted stock unit, Performance-based and Service-based \| Vesting on third anniversary of grant date
Total Shares Available for Grant under the Company's equity incentive plans:
Total stockholder return percentage	150.00%
Service and performance-based, percentage of equal vesting installments (as a percent)	33.3333%
Restricted stock unit, Performance-based and Service-based \| Vesting on fourth anniversary of grant date
Total Shares Available for Grant under the Company's equity incentive plans:
Total stockholder return percentage	175.00%
Service and performance-based, percentage of equal vesting installments (as a percent)	33.3333%
Restricted stock unit, Performance-based and Service-based \| Vesting on fifth anniversary of grant date
Total Shares Available for Grant under the Company's equity incentive plans:
Total stockholder return percentage	200.00%
Service and performance-based, percentage of equal vesting installments (as a percent)	33.3333%
Restricted stock units
Total Shares Available for Grant under the Company's equity incentive plans:
Restricted stock units granted (in shares)	(1,174)	(2,463)	(1,132)
Restricted stock units granted, adjustment (in shares)	103	5	33
Restricted stock units canceled (in shares)	218	51	69
Executive Management \| Restricted stock unit, Performance-based and Service-based
Total Shares Available for Grant under the Company's equity incentive plans:
Maximum number of shares available for grant (in shares)					800
Outside Director Option Plans \| Restricted stock unit, Performance-based and Service-based
Total Shares Available for Grant under the Company's equity incentive plans:
Balance as of beginning of period (in shares)	700	300
Balance as of end of period (in shares)	400	700	300
Maximum number of shares available for grant (in shares)	700	300	300	400
Outside Director Option Plans \| Awards Granted after November 6, 2013
Total Shares Available for Grant under the Company's equity incentive plans:
Impact on share reserve multiplier				2.0
2004 Plan \| Restricted stock unit, Performance-based and Service-based
Total Shares Available for Grant under the Company's equity incentive plans:
Balance as of end of period (in shares)	200
Maximum number of shares available for grant (in shares)	200			200
2004 Plan \| Restricted stock units
Total Shares Available for Grant under the Company's equity incentive plans:
Restricted stock units granted (in shares)	(587)
Restricted stock units granted, adjustment (in shares)	(52)
Restricted stock units canceled (in shares)	133
2004 Plan \| Awards Granted after November 6, 2013
Total Shares Available for Grant under the Company's equity incentive plans:
Impact on share reserve multiplier				2.0