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Employee Benefits - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2026
Defined Benefit Plan Disclosure [Line Items]        
Employer matching contribution, percent 5.25%      
Cost of contribution plan $ 15 $ 15 $ 14  
Additional cost of contribution plan $ 19 $ 18 $ 17  
Pension Plan Asset        
Defined Benefit Plan Disclosure [Line Items]        
Expected return on plan assets percentage 6.63%      
Postretirement Benefit Plan Assets        
Defined Benefit Plan Disclosure [Line Items]        
Expected return on plan assets percentage 5.00%      
Equity securities        
Defined Benefit Plan Disclosure [Line Items]        
Redemption period, days of notice (less than) 30 days      
Equity securities | Pension Plan Asset        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage 37.00%      
Equity securities | Pension Plan Asset | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage       38.00%
Equity securities | Postretirement Benefit Plan Assets | Non Bargained VEBA        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage 60.00%      
Equity securities | Postretirement Benefit Plan Assets | Non Bargained VEBA | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage       60.00%
Fixed income securities | Pension Plan Asset        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage 63.00%      
Fixed income securities | Pension Plan Asset | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage       62.00%
Fixed income securities | Postretirement Benefit Plan Assets | Bargained VEBA        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage 100.00%      
Fixed income securities | Postretirement Benefit Plan Assets | Bargained VEBA | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage       100.00%
Fixed income securities | Postretirement Benefit Plan Assets | Active VEBA        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage 100.00%      
Fixed income securities | Postretirement Benefit Plan Assets | Active VEBA | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage       100.00%
Fixed income securities | Postretirement Benefit Plan Assets | Non Bargained VEBA        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage 40.00%      
Fixed income securities | Postretirement Benefit Plan Assets | Non Bargained VEBA | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, plan assets, target allocation, percentage       40.00%
Real estate fund        
Defined Benefit Plan Disclosure [Line Items]        
Redemption period, days of notice (less than) 90 days