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Postretirement Benefits - Actuarial Assumptions (Details)
2 Months Ended 3 Months Ended 4 Months Ended 5 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2025
Oct. 31, 2025
Aug. 31, 2024
Dec. 31, 2024
May 31, 2024
Aug. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Employee Pension Plan                  
Actuarial assumptions used to determine benefit obligations:                  
Discount rate 5.72%     5.87%     5.72% 5.87%  
Rate of compensation increase 5.07%     5.01%     5.07% 5.01%  
Actuarial assumptions used to determine net periodic benefit costs:                  
Discount rate             5.87% 5.34% 5.67%
Expected return on assets             7.00% 7.00% 6.50%
Rate of compensation increase             5.05% 4.31% 3.30%
Supplemental Employee Retirement Plan (SERP)                  
Actuarial assumptions used to determine benefit obligations:                  
Discount rate 5.44%     5.65%     5.44% 5.65%  
Rate of compensation increase 7.00%     7.00%     7.00% 7.00%  
Actuarial assumptions used to determine net periodic benefit costs:                  
Discount rate 5.29% 5.51% 5.53% 5.12% 5.11% 5.65%     5.46%
Rate of compensation increase             7.00% 5.00% 5.00%