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Retirement Plans and Postretirement Medical Benefits (Pretax Amounts Recognized in AOCL) (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Nonpension postretirement benefit plans    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial (gain) loss $ (18,511) $ (14,360)
United States | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial (gain) loss 633,733 717,530
Prior service (credit) cost (65) (85)
Transition asset 0 0
Total 633,668 717,445
Foreign | Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial (gain) loss 350,007 331,536
Prior service (credit) cost 6,969 7,266
Transition asset (7) (7)
Total $ 356,969 $ 338,795