v3.26.1
Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Income Tax Expense (Benefit) $ (110) $ (81)
Net income 330 286
Unrealized Appreciation Depreciation Of Investments [Member]    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Investment related gains (losses), net (126) (60)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest (143) (76)
Income Tax Expense (Benefit) 39 13
Net income (104) (63)
Amortization Of Unrealized Pension And Postretirement Benefits [Member]    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Prior service cost 0 0
Actuarial gains/(losses) (2) 0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest (2) 0
Income Tax Expense (Benefit) 0 0
Net income (2) 0
Amounts Reclassified From AOCI [Member]    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Net income (106) (63)
Currency Swap [Member] | Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member]    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Cash Flow Derivative Gains Losses Reclassified Into Income From AOCI [1] (18) (17)
Interest Rate Options [Member] | Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member]    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Cash Flow Derivative Gains Losses Reclassified Into Income From AOCI [1] 1 1
Cash Flow Hedging [Member] | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Cash Flow Derivative Gains Losses Reclassified Into Income From AOCI 1 2
Cash Flow Hedging [Member] | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Cash Flow Derivative Gains Losses Reclassified Into Income From AOCI 18 18
Cash Flow Hedging [Member] | Interest Rate Swaps | Income Statement Location [Axis]: us-gaap:InterestExpenseOperating    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Cash Flow Derivative Gains Losses Reclassified Into Income From AOCI 1 2
Cash Flow Hedging [Member] | Interest Rate Swaps | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Cash Flow Derivative Gains Losses Reclassified Into Income From AOCI $ 0 $ 1
[1] See Note 11 for information on cash flow hedges