Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Schedule of Goodwill (Details)

v3.22.4
Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)
$ in Millions
 2 Months Ended 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 31, 2021
Jun. 30, 2022
Oct. 19, 2021
Dec. 31, 2022
Jun. 30, 2021
Jun. 30, 2020
Oct. 20, 2021
Goodwill [Roll Forward]              
Goodwill, beginning balance $ 1,662.6   $ 677.4 $ 1,418.0 $ 681.5 $ 522.6 $ 0.0
Business Combination and other acquisitions - measurement period adjustments       3.4      
CI acquisition       4.9      
Goodwill impairment 0.0 $ (55.2) 0.0 (211.8) 0.0 0.0  
Goodwill reclassified as assets held for sale       (7.3)      
Translation adjustment (13.7)   (5.0) (33.8) 16.0    
Goodwill, ending balance 1,662.6   677.4 1,418.0 681.5 522.6  
Sun Nuclear              
Goodwill [Roll Forward]              
CI acquisition         130.2    
Biodex              
Goodwill [Roll Forward]              
CI acquisition         11.1    
Dosimetrics              
Goodwill [Roll Forward]              
CI acquisition         1.6    
Dosimetry Badge              
Goodwill [Roll Forward]              
CI acquisition     0.9        
Mirion              
Goodwill [Roll Forward]              
Goodwill, beginning balance             1,642.9
CI acquisition 1,639.0            
CHP              
Goodwill [Roll Forward]              
CI acquisition 1.5            
Safeline              
Goodwill [Roll Forward]              
CI acquisition 0.8            
CIRS              
Goodwill [Roll Forward]              
CI acquisition 35.0            
Medical              
Goodwill [Roll Forward]              
Goodwill, beginning balance 712.5   250.0 616.0 249.5 106.8 0.0
Business Combination and other acquisitions - measurement period adjustments       (1.9)      
Goodwill impairment       (87.3)      
Goodwill reclassified as assets held for sale       (7.3)      
Translation adjustment     (0.4)   (0.2)    
Goodwill, ending balance 712.5   250.0 616.0 249.5 106.8  
Medical | Sun Nuclear              
Goodwill [Roll Forward]              
CI acquisition         130.2    
Medical | Biodex              
Goodwill [Roll Forward]              
CI acquisition         11.1    
Medical | Dosimetrics              
Goodwill [Roll Forward]              
CI acquisition         1.6    
Medical | Dosimetry Badge              
Goodwill [Roll Forward]              
CI acquisition     0.9        
Medical | Mirion              
Goodwill [Roll Forward]              
CI acquisition 675.2            
Medical | CHP              
Goodwill [Roll Forward]              
CI acquisition 1.5            
Medical | Safeline              
Goodwill [Roll Forward]              
CI acquisition 0.8            
Medical | CIRS              
Goodwill [Roll Forward]              
CI acquisition 35.0            
Industrial              
Goodwill [Roll Forward]              
Goodwill, beginning balance 950.1   427.4 802.0 432.0 415.8 $ 0.0
Business Combination and other acquisitions - measurement period adjustments       5.3      
CI acquisition       4.9      
Goodwill impairment       (124.5)      
Translation adjustment (13.7)   (4.6) (33.8) 16.2    
Goodwill, ending balance 950.1   $ 427.4 $ 802.0 $ 432.0 $ 415.8  
Industrial | Mirion              
Goodwill [Roll Forward]              
CI acquisition $ 963.8