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Retirement Benefits (Benefit Assumptions) (Details)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]    
Health care cost trend rate 7.44% 7.42%
Rate to which the cost trend is assumed to decline (the ultimate trend rate) 5.09% 5.17%
Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.80% 2.70%
Discount rate 5.40% 2.70%
Tax exempt accounts 7.00% 7.00%
Taxable accounts 4.26% 0.00%
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.40% 4.62%
Discount rate 4.40% 4.93%
Tax exempt accounts 7.00% 7.00%
Taxable accounts 4.75% 4.75%