General form of registration statement for all companies including face-amount certificate companies

Segment Information - Summary of Revenue by Product Category (Detail)

v3.21.2
Segment Information - Summary of Revenue by Product Category (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Revenue from External Customer [Line Items]      
Revenues $ 611.6 $ 478.2 $ 440.1
Medical | Medical Segment      
Revenue from External Customer [Line Items]      
Revenues 155.7 62.9 42.9
Reactor Safety and Control Systems | Industrial Segment      
Revenue from External Customer [Line Items]      
Revenues 146.8 135.4 133.3
Radiological Search, Measurement and Analysis Systems | Industrial Segment      
Revenue from External Customer [Line Items]      
Revenues $ 309.1 $ 280.2 $ 263.9