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Employee Postretirement Benefits - Narrative (Details) - Pension Plan - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2023
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Oct. 01, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]            
Contributions by employer     $ 0 $ 20,000,000    
Reduction from plan amendment     $ (20,100,000)      
Reduction attributable to increase in discount rate to measurement plan liability   $ 2,600,000        
Discount rate (as a percent)   6.06% 6.06%     5.52%
Subsequent Event            
Defined Benefit Plan Disclosure [Line Items]            
Savings attributable to the plan change $ 17,500,000          
Expected remaining service period (in years)         4 years 9 months 18 days