Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2020
Jul. 20, 2020
Dec. 31, 2019
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2020    
Document Transition Report false    
Entity File Number 000-09992    
Entity Registrant Name KLA CORP    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 04-2564110    
Entity Address, Address Line One One Technology Drive,    
Entity Address, City or Town Milpitas,    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95035    
City Area Code 408    
Local Phone Number 875-3000    
Title of 12(b) Security Common Stock, $0.001 par value per share    
Trading Symbol KLAC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 27,900
Entity Common Stock, Shares Outstanding   155,461,444  
Documents Incorporated by Reference Portions of the Proxy Statement for the 2020 Annual Meeting of Stockholders (“Proxy Statement”), and to be filed pursuant to Regulation 14A within 120 days after the registrant’s fiscal year ended June 30, 2020, are incorporated by reference into Part III of this report.    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000319201    
Current Fiscal Year End Date --06-30