Pension and Severance Plans (Summarizes The Weighted-average Assumptions) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Discount rate for determining net periodic pension cost (as a percent)	4.20%	2.60%	2.30%
Discount rate for determining benefit obligations at December 31 (as a percent)	3.80%	4.20%	2.60%
Rate of compensation increase for determining net periodic pension cost (as a percent)	3.60%	3.70%	3.70%
Rate of compensation increase for determining benefit obligations at December 31 (as a percent)	3.70%	3.60%	3.70%
Expected rate of return on plan assets for determining net periodic pension cost (as a percent)	4.10%	3.80%	3.70%