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Savings, Pension and Other Postretirement Employee Benefit Plans - Multiemployer Defined Benefit Plans (Details)
 7 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2023
USD ($)
$ / Hour
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Defined Benefit Plan Disclosure [Line Items]        
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost   $ 5,800,000 $ 5,700,000 $ 5,700,000
Multiemployer Plan, Contribution Rate Increase (Decrease)   2.50%    
Defined Benefit Plan, Number of Investment Options Holding Substantially All Pension Funds   8    
IAM        
Defined Benefit Plan Disclosure [Line Items]        
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List]   No    
Multiemployer Plan, Pension, Significant, Plan Number   002    
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost   $ 200,000 $ 300,000 300,000
Multiemployer Plan, Pension, Significant, Collective-Bargaining Arrangement, Expiration Date   May 31, 2026    
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List]   Red Red  
USW        
Defined Benefit Plan Disclosure [Line Items]        
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List]   No    
Multiemployer Plan, Pension, Significant, Plan Number   001    
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost   $ 5,600,000 $ 5,500,000 $ 5,400,000
Multiemployer Plan, Pension, Significant, Collective-Bargaining Arrangement, Expiration Date   Aug. 31, 2025    
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List]   Red Red  
International Association Of Machinist Contribution Rate        
Retirement Benefits [Abstract]        
Contribution rates | $ / Hour   4.00    
United Steel Workers Contribution Rate        
Retirement Benefits [Abstract]        
Contribution rates | $ / Hour   2.79    
International Association Of Machinist Contribution Rate Additional Contribution        
Defined Benefit Plan Disclosure [Line Items]        
Multiemployer Plan, Contribution Rate Increase (Decrease) 2.50% 13.30%