Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Financial Information of the Registrant - CONDENSED BALANCE SHEET (Details)

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Schedule I - Condensed Financial Information of the Registrant - CONDENSED BALANCE SHEET (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Oct. 20, 2021
Oct. 19, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
ASSETS                
Other assets $ 24.3   $ 24.7     $ 16.2    
Total assets 2,738.7   3,118.0     1,547.2    
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)                
Total liabilities 1,271.5   1,334.0     2,386.7    
Additional paid-in capital 1,882.4   1,845.5     9.5    
Accumulated deficit (408.5)   (131.6)     (888.0)    
Accumulated other comprehensive (loss) income (75.7)   (20.7)     39.2    
Mirion Technologies, Inc. (Successor) stockholders’ equity 1,398.2   1,693.2     (841.6)    
Noncontrolling interests 69.0   90.8     2.1    
Total stockholders’ equity 1,467.2   1,784.0 $ (109.4) $ (944.1) (839.5) $ (716.5) $ (587.7)
Total liabilities and stockholders’ equity 2,738.7   3,118.0     1,547.2    
Parent Company                
ASSETS                
Other assets   $ 0.3       0.1    
Investments in Sub 1,496.8 839.8 1,851.1     716.5    
Total assets 1,496.8 0.3 1,851.1     0.1    
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)                
Warrant liabilities 30.5   68.1          
Deferred income taxes and other liabilities (0.9) 0.1 (1.0)     0.1    
Total liabilities 29.6 839.9 67.1     716.6    
Additional paid-in capital 1,882.4   1,845.5          
Accumulated deficit (408.5)   (131.6)          
Accumulated other comprehensive (loss) income (75.7)   (20.7)          
Mirion Technologies, Inc. (Successor) stockholders’ equity 1,398.2 (839.6) 1,693.2     (716.5)    
Noncontrolling interests 69.0   90.8          
Total stockholders’ equity 1,467.2   1,784.0          
Total liabilities and stockholders’ equity $ 1,496.8 $ 0.3 $ 1,851.1     $ 0.1