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Employee Benefit Plans (Assumptions Used in Accounting for Defined Benefit Pension and Other Post-Retirement Benefit Plans) (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Defined benefit pension plans    
Benefit obligation - December 31:    
Discount rate - past service 4.89% 5.33%
Discount rate - future service 4.88% 5.34%
Rate of compensation increase 3.87% 3.62%
Health care trend - initial (next year) 0.00% 0.00%
Health care trend - ultimate 0.00% 0.00%
Benefit cost for year ended December 31:    
Discount rate - past service 5.33% 3.05%
Discount rate - future service 5.34% 3.18%
Expected long-term return on plan assets 6.56% 6.07%
Rate of compensation increase 3.62% 3.31%
Health care trend - initial (next year) 0.00% 0.00%
Health care trend - ultimate 0.00% 0.00%
Non-pension Benefit Plans    
Benefit obligation - December 31:    
Discount rate - past service 4.89% 5.31%
Discount rate - future service 4.89% 5.32%
Rate of compensation increase 3.85% 3.61%
Health care trend - initial (next year) 6.04% 5.40%
Health care trend - ultimate 3.76% 3.77%
Health care trend - year ultimate reached 2043 2043
Benefit cost for year ended December 31:    
Discount rate - past service 5.31% 2.81%
Discount rate - future service 5.32% 2.92%
Expected long-term return on plan assets 2.16% 1.32%
Rate of compensation increase 3.61% 3.29%
Health care trend - initial (next year) 5.40% 5.09%
Health care trend - ultimate 3.77% 3.77%
Health care trend - year ultimate reached 2043 2042