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Retirement Plans and Postretirement Medical Benefits (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Percent of all foreign plan assets 73.00%    
Assumed health care cost trend rate 6.50% 6.80%  
Next year's assumed health care cost trend rate 6.75%    
Assumed health care cost trend rate decline 5.00%    
Total contributions to defined contribution plans $ 28,000,000 $ 27,000,000  
Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10,416,000 16,820,000  
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 8,000,000  
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 $ 1,161,361,000 $ 1,549,157,000 1,601,786,000
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 $ 14,000,000    
Foreign | Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 438,403,000 $ 737,443,000 $ 742,639,000