XML 135 R120.htm IDEA: XBRL DOCUMENT v3.25.4
Benefit Plans - Assumptions Used to Determine Pension Expense (Details)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - projected benefit obligation 5.57% 5.00% 5.31%
Discount rate - interest cost 5.78% 4.92% 5.23%
Expected long-term return on plan assets 7.25% 7.25% 7.50%
OPEB      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - projected benefit obligation 5.17% 4.96% 5.29%
Discount rate - interest cost 5.50% 4.96% 5.29%
Assumed healthcare cost trend rate 7.75% 7.00% 5.50%
Ultimate health care cost trend rate 4.50%