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Employee Benefit Plans (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
pension_plan
investment
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Number of significant plans | pension_plan 3    
Pension benefit obligation (as a percent) 84.00%    
Number of frozen plans | pension_plan 1    
Cash Surrender Value | $ $ 2.8 $ 2.8 $ 2.8
Target allocation (as a percent) 100.00% 100.00%  
Number of investments | investment 7    
Expected employer contributions | $ $ 5.0    
Number of union sponsored multiemployer plans | pension_plan 1    
Withdrawal obligation | $ $ 19.0    
Equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 60.00% 60.00%  
Mutual funds      
Defined Benefit Plan Disclosure [Line Items]      
Number of investments | investment 6    
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Average rate used to determine discount rate 25.00%    
Other Postretirement Benefits Plan | Frozen Plans | Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 60.00%    
Other Postretirement Benefits Plan | Frozen Plans | Equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 40.00%    
Other Postretirement Benefits Plan | Active Plans | Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 25.00%    
Other Postretirement Benefits Plan | Active Plans | Equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 75.00%    
Minimum | U.S. treasuries      
Defined Benefit Plan Disclosure [Line Items]      
Maturities (term) 20 years    
Maximum | U.S. treasuries      
Defined Benefit Plan Disclosure [Line Items]      
Maturities (term) 30 years