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Pensions and Other Postretirement Plans (Key Assumptions - Obligation) (Details 3) - Benefit Obligation [Member]
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate (percent) 5.20% 5.50%
Cash balance interest crediting rate 4.28% 4.28%
Ultimate cash balance interest crediting rate 5.20% 5.50%
Year that reaches ultimate cash balance interest crediting rate 2025 2025
Supplemental Executive Retirement Plan (SERP) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate (percent) 5.10% 5.50%
Cash balance interest crediting rate 0.00% 0.00%
Maximum [Member] | Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Rate of compensation increase (percent) 5.00% 5.00%
Maximum [Member] | Supplemental Executive Retirement Plan (SERP) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Rate of compensation increase (percent) 5.00% 5.00%
Minimum [Member] | Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Rate of compensation increase (percent) 1.00% 1.00%
Minimum [Member] | Supplemental Executive Retirement Plan (SERP) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Rate of compensation increase (percent) 1.00% 1.00%