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Pensions and Other Postretirement Plans (Key Assumptions - Cost) (Details 6) - Periodic Cost [Member]
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (percent) 2.90% 2.50% 3.30%
Expected return on plan assets (percent) 6.25% 6.25% 6.25%
Cash balance interest crediting rate 1.41% 1.41% 2.77%
Ultimate cash balance interest crediting rate 2.90% 2.50% 3.30%
Year that reaches ultimate cash balance interest crediting rate 2024 2023 2022
Pension Plans [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Rate of compensation increase (percent) 1.00% 1.00% 1.00%
Pension Plans [Member] | Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Rate of compensation increase (percent) 5.00% 5.00% 5.00%
Supplemental Executive Retirement Plan (SERP) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (percent) 2.90% 2.50% 3.30%
Expected return on plan assets (percent) 0.00% 0.00% 0.00%
Cash balance interest crediting rate 0.00% 0.00% 0.00%
Supplemental Executive Retirement Plan (SERP) [Member] | Minimum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Rate of compensation increase (percent) 1.00% 1.00% 1.00%
Supplemental Executive Retirement Plan (SERP) [Member] | Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Rate of compensation increase (percent) 5.00% 5.00% 5.00%