Pension Plans and Postretirement Benefits - Target Allocation by Asset Class (Detail) - Pension Benefits	Dec. 31, 2025
United States: \| Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	56.00%
United States: \| Equities
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	33.00%
United States: \| Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation by asset class	11.00%
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%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details