v3.25.1
Benefit Plans (Components of Net Periodic Cost (Benefit)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Retirement Benefits [Abstract]    
Interest cost on projected benefit obligation $ 9 $ 22
Expected return on plan assets (14) (29)
Amortization of net actuarial loss (gain) 2 7
Total net periodic pension cost (benefit) $ (3) $ 0
DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag Other operating expenses, Insurance claims and policyholders’ benefits (re-measurement loss of $8 and $15) Other operating expenses, Insurance claims and policyholders’ benefits (re-measurement loss of $8 and $15)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other operating expenses, Insurance claims and policyholders’ benefits (re-measurement loss of $8 and $15)  
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other operating expenses, Insurance claims and policyholders’ benefits (re-measurement loss of $8 and $15)