v3.25.4
Employee Benefits (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension      
Defined Benefit Plan Disclosure [Line Items]      
Contribution expense $ 0 $ 0 $ 300,000
Postretirement benefit plans      
Defined Benefit Plan Disclosure [Line Items]      
Contribution expense 2,000,000   1,000,000
Contribution benefit   (2,000,000)  
Defined benefit plan, benefit obligation $ 31,000,000 31,000,000  
Defined benefit plan eligibility age (in years) 55 years    
Defined benefit plan requisite service period (in years) 10 years    
Postretirement Health Coverage      
Defined Benefit Plan Disclosure [Line Items]      
Contribution expense $ 70,000,000 70,000,000 68,000,000
Defined benefit plan requisite service period (in years) 5 years    
Contributions to defined benefit plan $ 1,000,000 $ 2,000,000 $ 7,000,000