Quarterly report [Sections 13 or 15(d)]

GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details)

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GOODWILL AND PURCHASED INTANGIBLE ASSETS - Additional Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Feb. 28, 2025
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2025
Mar. 31, 2024
Jun. 30, 2024
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets $ 0         $ 230,400,000    
Impairment of intangible assets           0    
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]     Impairment of goodwill and purchased intangible assets   Impairment of goodwill and purchased intangible assets      
Intangible asset impairment charge     $ 8,700,000   $ 26,400,000      
Amortization of intangible assets   $ 53,900,000   $ 57,800,000   169,500,000 $ 180,400,000  
Semiconductor Process Control:                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets           0    
Non-deductible impairment of goodwill   277,600,000       277,600,000   $ 277,600,000
Specialty Semiconductor Process                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets           0    
Non-deductible impairment of goodwill               144,200,000
PCB And Component Inspection                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets           230,400,000    
Non-deductible impairment of goodwill   $ 70,500,000       $ 70,500,000   $ 70,500,000
PCB                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets     230,400,000          
Specialty Semiconductor Process                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets     $ 0          
PCB And Component Inspection | Valuation, Income Approach                
Goodwill [Line Items]                
Reporting unit, percentage of fair value   75.00%       75.00%    
PCB And Component Inspection | Valuation, Market Approach                
Goodwill [Line Items]                
Reporting unit, percentage of fair value   25.00%       25.00%    
PCB And Display                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets         $ 192,600,000      
Display                
Goodwill [Line Items]                
Impairment of goodwill and purchased intangible assets       $ 70,500,000