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

Parent Company Financial Information - Summary Of Condensed Balance Sheet (Detail)

v3.21.2
Parent Company Financial Information - Summary Of Condensed Balance Sheet (Detail) - USD ($)
$ in Millions
Jun. 30, 2021
Jun. 30, 2020
Assets:    
Total assets $ 1,547.2 $ 1,243.8
Liabilities and Stockholders' Equity:    
Deferred income taxes and other liabilities 77.5 63.5
Total liabilities 2,386.7 1,960.3
Total stockholders' equity/(deficit) (841.6) (718.7)
Total liabilities and stockholders' deficit 1,547.2 1,243.8
Parent Company [Member] | MIRION TECHNOLOGIES LTD [Member]    
Assets:    
Other assets 0.3 0.1
Total assets 0.3 0.1
Liabilities and Stockholders' Equity:    
Investment in subsidiary 839.8 716.5
Deferred income taxes and other liabilities 0.1 0.1
Total liabilities 839.9 716.6
Total stockholders' equity/(deficit) (839.6) (716.5)
Total liabilities and stockholders' deficit $ 0.3 $ 0.1