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Employee Retirement Plans - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 20, 2018
USD ($)
element
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Defined Contribution Plan Disclosure [Line Items]              
Contribution made   $ 1.7 $ 3.7        
Contribution made, fixed contributions   1.7 3.4        
Contribution made, profit related contributions     0.3        
Expected contributions   3.9 3.9        
Expected contributions, fixed contributions   $ 3.9 $ 3.9        
GMSL              
Defined Contribution Plan Disclosure [Line Items]              
Deferred contribution $ 12.7            
Number of elements | element 3            
Percent of operating profit (equal to) 10.00%            
Years in arrears 2 years            
Variable contribution, percent of dividends (equal to) 50.00%            
GMSL | Scenario, Forecast              
Defined Contribution Plan Disclosure [Line Items]              
Fixed contributions       $ 3.0 $ 7.0 $ 6.8 $ 6.6