Retirement Plans and Postretirement Medical Benefits (Components of Net Periodic Benefit Cost (Income) for Defined Benefit Pension Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 0	$ 91,339	$ 0
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlements		91,000
Nonpension postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	273	369	367
Interest cost	4,159	4,479	5,031
Amortization of net actuarial loss	(2,456)	(1,451)	(2,249)
Net periodic benefit cost (income)	1,976	3,397	3,149
United States | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	25	49	44
Interest cost	53,485	58,131	63,533
Expected return on plan assets	(74,302)	(85,701)	(86,008)
Amortization of prior service (credit) cost	(20)	(20)	(20)
Amortization of net actuarial loss	20,156	19,190	17,362
Settlements	0	88,051	771
Net periodic benefit cost (income)	(656)	79,700	(4,318)
Foreign | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,143	745	766
Interest cost	23,477	20,815	21,238
Expected return on plan assets	(26,585)	(25,858)	(29,899)
Amortization of prior service (credit) cost	307	298	286
Amortization of net actuarial loss	9,120	7,737	2,068
Settlements	197	3,373	(25)
Net periodic benefit cost (income)	$ 7,659	$ 7,110	$ (5,566)