v3.26.1
RELATED-PARTY TRANSACTIONS (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 1994
ECIL-Rapiscan Security Products Limited        
RELATED-PARTY TRANSACTIONS        
Sales to joint venture $ 1.8 $ 6.0 $ 10.4  
ECIL-Rapiscan Security Products Limited        
RELATED-PARTY TRANSACTIONS        
Ownership interest in joint venture (as a percent)       36.00%
Initial investment       $ 0.1
Receivables from joint venture $ 1.8 $ 3.5    
ECIL-Rapiscan Security Products Limited | Executive Chairman        
RELATED-PARTY TRANSACTIONS        
Related party ownership percentage in equity method investee of the reporting entity       10.50%
ECIL-Rapiscan Security Products Limited | President and Chief Executive Officer        
RELATED-PARTY TRANSACTIONS        
Related party ownership percentage in equity method investee of the reporting entity       4.50%
Maximum | ECIL-Rapiscan Security Products Limited | Management        
RELATED-PARTY TRANSACTIONS        
Collective voting power control, by entity and related parties, in equity method investment of entity (as a percent) 50.00%