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Benefit Plans (Components of Net Periodic Cost (Benefit)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Interest cost on projected benefit obligation $ 87 $ 98 $ 67
DefinedBenefitPlanNetPeriodicBenefitCostCreditExpectedReturnLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag Expected return on plan assets    
Expected return on plan assets $ (116) (119) (152)
DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag Amortization of net actuarial loss (gain)    
Amortization of net actuarial loss (gain) $ 29 33 30
Pension settlement transaction loss 371 0 0
Total net periodic pension cost (benefit) $ 371 $ 12 $ (55)
Defined benefit plan net periodic benefit cost credit settlement gain loss statement of income or comprehensive income extensible list not disclosed flag Pension settlement transaction loss Pension settlement transaction loss Pension settlement transaction loss
DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag Interest cost on projected benefit obligation Interest cost on projected benefit obligation  
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Interest cost on projected benefit obligation $ 87 $ 98