Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

v3.22.4
Employee Benefit Plans (Details) - USD ($)
$ in Millions
 2 Months Ended 4 Months Ended 12 Months Ended
Dec. 31, 2021
Oct. 19, 2021
Dec. 31, 2022
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]            
Unrealized gain (loss) on pension and postretirement benefit plans, net of tax $ 1.6   $ (1.5) $ 2.2    
Estimated future benefit payments     4.9      
Benefits expense 0.6 $ 1.0 2.5 3.7 $ 3.1  
Defined Benefit Pension Plans            
Defined Benefit Plan Disclosure [Line Items]            
Business expense 0.3 $ 0.3 1.3 1.2 $ 1.2  
Unfunded benefit plan | Defined Benefit Pension Plans            
Defined Benefit Plan Disclosure [Line Items]            
Benefit obligation 11.4   8.2 12.3    
Unfunded benefit plan | Other Postretirement Benefit Plans            
Defined Benefit Plan Disclosure [Line Items]            
Benefit obligation $ 0.6   $ 0.5 $ 0.7   $ 0.7