v3.26.1
Derivative Financial Instruments - Effect of Qualifying Hedge Accounting (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Net investment income $ 537 $ 584 $ 1,106 $ 1,144
Net gains (losses) (40) (41) (85) (75)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 58 (11) 59 (48)
Interest rate contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 38 (30) 60 (77)
Interest rate contracts | Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments, Gain (Loss) [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0 0 0
Foreign exchange contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (1) 0 (3) 5
Foreign exchange contracts | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings 0 0 0 0
Foreign exchange contracts | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings (1) 9 (4) 13
Foreign exchange contracts | Designated as Hedging Instrument        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net 0 1 1 1
Foreign exchange contracts | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings 0 0 0 0
Foreign exchange contracts | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) on Fair Value Hedges Recognized in Earnings 1 (9) 5 (13)
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument        
Derivative Instruments, Gain (Loss) [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 1 1 3 3
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NetInvestmentIncome        
Derivative Instruments, Gain (Loss) [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 1 1 3 3
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses        
Derivative Instruments, Gain (Loss) [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 0 0 0 0
Equity contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 19 14 12 7
Fixed maturities        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (3) 3 (4) 7
Embedded derivatives within reinsurance        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 5 0 (4) 5
Managed custody guarantees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (1) 2 (1) 1
Managed custody guarantees        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 0 $ 1 $ (2) $ 5