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Employee Benefits - Weighted Average Assumptions Used In Determining Benefit Obligations (Detail)
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]        
Discount rate   5.00% 5.20% 2.90%
Pension        
Defined Benefit Plan Disclosure [Line Items]        
Discount rate 5.80% 5.00%    
Rate of compensation increases 3.00% 3.00%    
Health Care and Life        
Defined Benefit Plan Disclosure [Line Items]        
Discount rate 5.60% 5.00%