Pension Plans and Postretirement Benefits - Target Allocation by Asset Class (Detail) - Pension Plan |
Dec. 31, 2023 |
|---|---|
| United States: | Fixed Income | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Target allocation by asset class | 57.00% |
| United States: | Equities | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Target allocation by asset class | 33.00% |
| United States: | Cash and Other | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Target allocation by asset class | 10.00% |
| Canada | Fixed Income | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Target allocation by asset class | 65.00% |
| Canada | Equities | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Target allocation by asset class | 35.00% |