Retirement Plans and Postretirement Medical Benefits (Pretax Amounts Recognized in AOCI) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Nonpension postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain	$ (14,360)	$ (16,405)
United States \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain	717,530	698,815
Prior service (credit) cost	(85)	(105)
Transition asset	0	0
Total	717,445	698,710
Foreign \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain	331,536	297,753
Prior service (credit) cost	7,266	7,552
Transition asset	(7)	(7)
Total	$ 338,795	$ 305,298

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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