Annual report pursuant to Section 13 and 15(d)

Segment Information - Revenue from External Customers by Products and Services (Details)

v3.22.0.1
Segment Information - Revenue from External Customers by Products and Services (Details) - USD ($)
$ in Millions
 2 Months Ended 4 Months Ended 12 Months Ended
Dec. 31, 2021
Oct. 19, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Revenue from External Customer [Line Items]          
Total revenues $ 154.1 $ 168.0 $ 611.6 $ 478.2 $ 440.1
Medical | Medical          
Revenue from External Customer [Line Items]          
Total revenues 49.2 60.3 155.7 62.6 42.9
Reactor Safety and Control Systems | Industrial          
Revenue from External Customer [Line Items]          
Total revenues 30.6 34.7 146.8 135.4 133.3
Radiological Search, Measurement, and Analysis Systems | Industrial          
Revenue from External Customer [Line Items]          
Total revenues $ 74.3 $ 73.0 $ 309.1 $ 280.2 $ 263.9