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Pension and Severance Plans (Schedule of Weighted-average Assumptions Used in Computing the Net Periodic Pension Cost and Projected Benefit Obligations) (Details)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Retirement Benefits [Abstract]      
Discount rate for determining net periodic pension cost (as a percent) 3.80% 4.20% 2.60%
Discount rate for determining benefit obligations at December 31 (as a percent) 3.80% 3.80% 4.20%
Rate of compensation increase for determining net periodic pension cost (as a percent) 3.70% 3.60% 3.70%
Rate of compensation increase for determining benefit obligations at December 31 (as a percent) 3.80% 3.70% 3.60%
Expected rate of return on plan assets for determining net periodic pension cost (as a percent) 4.50% 4.10% 3.80%