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Benefit Plans - Schedule of Assumed Health Care Cost Trend Rate (Details) - Other Postretirement Benefits
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Weighted-average actuarial assumptions used to determine other postretirement benefit plans costs and obligations:      
Healthcare cost trend rate assumed for next year (as a percent) 4.40% 5.10% 6.80%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) (as a percent) 4.00% 4.00% 4.40%