Pension Plans and Postretirement Benefits - Weighted Average Assumptions (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Pension Benefits | |||
| Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] | |||
| Discount rate | 5.30% | 5.62% | |
| Discount rate to determine interest cost | 5.27% | 4.88% | 5.26% |
| Expected return on plan assets | 6.89% | 7.13% | 7.13% |
| Other Benefits | |||
| Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] | |||
| Discount rate | 5.09% | 5.33% | |
| Discount rate to determine interest cost | 4.99% | 4.84% | 5.23% |
| Expected return on plan assets | 4.23% | 4.20% | 5.67% |