Retirement Plans and Postretirement Medical Benefits (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Percent of all foreign plan assets	74.00%
Assumed health care cost trend rate	6.75%	6.50%
Next year's assumed health care cost trend rate	6.25%
Assumed health care cost trend rate decline	5.00%
Total contributions to defined contribution plans	$ 28,000,000	$ 28,000,000
Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,615,000	10,416,000
Unfunded Plan | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,000,000	6,000,000
Nonpension postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0	$ 0
United States
Defined Benefit Plan Disclosure [Line Items]
Next year's anticipated total contributions to pension plans	0
United States | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,153,490,000	$ 1,161,361,000	1,549,157,000
United States | Pension Benefits | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Funded percentage	1.00%	1.00%
Foreign
Defined Benefit Plan Disclosure [Line Items]
Next year's anticipated total contributions to pension plans	$ 6,000,000
Foreign | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 466,687,000	$ 438,403,000	$ 737,443,000