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Pension and Other Benefit Programs - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Contributions $ 0 $ 0 $ 0
Amount pending settlement $ 56,000,000 50,000,000  
Period of amortization 4 years    
Corridor approach percentage 10.00%    
Cash surrender value of life insurance $ 60,000,000 60,000,000  
Net periodic post-retirement benefit costs $ (4,000,000) (5,000,000) (2,000,000)
Health care cost trend rate assumed 7.70%    
Ultimate health care cost trend rate 3.90%    
Contribution plan cost $ 74,000,000 69,000,000 64,000,000
Supplemental Employee Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net periodic post-retirement benefit costs 1,000,000 1,000,000 1,000,000
Post-retirement Benefit Plans      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net periodic post-retirement benefit costs $ 5,000,000 $ 3,000,000 $ 3,000,000
Discount rate 5.30% 4.70%  
Weighted-average discount rate for determining interest costs (pension/SERP plans) 4.60% 4.80%  
Medicare subsidy receipts $ 8,000,000    
Equity securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Target allocation, percentage 5.00%    
Fixed income securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Target allocation, percentage 95.00%