v3.25.2
Derivative Financial Instruments - Net Realized Gains (Losses) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivatives, Fair Value [Line Items]        
Net Investment Income $ 434,000,000 $ 373,000,000 $ 847,000,000 $ 749,000,000
Derivative, Gain (Loss) on Derivative, Net (24,000,000) 19,000,000 (42,000,000) 109,000,000
Realized capital gains (losses) (50,000,000) (11,000,000) (69,000,000) 4,000,000
Interest rate contracts | Not Designated as Hedging Instrument        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net (26,000,000) 22,000,000 (64,000,000) 111,000,000
Interest rate contracts | Cash flow hedges | Designated as Hedging Instrument | Other Comprehensive Income (Loss)        
Derivatives, Fair Value [Line Items]        
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred 0 0 0 0
Interest rate contracts | Cash flow hedges | Designated as Hedging Instrument | Investment Income        
Derivatives, Fair Value [Line Items]        
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred 0 0 0 0
Interest rate contracts | Fair Value Hedging [Member] | Investment Income        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 0 0 0 0
Interest rate contracts | Fair Value Hedging [Member] | Gain (Loss) on Investments        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 0 1,000,000 0 1,000,000
Interest rate contracts | Fair Value Hedging [Member] | Designated as Hedging Instrument | Investment Income        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 0 0 0 0
Interest rate contracts | Fair Value Hedging [Member] | Designated as Hedging Instrument | Other Net Realized Capital Gains (Losses)        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net     0 (1,000,000)
Interest rate contracts | Fair Value Hedging [Member] | Designated as Hedging Instrument | Gain (Loss) on Investments        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 0 (1,000,000)    
Foreign exchange contracts | Not Designated as Hedging Instrument        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net (6,000,000) (1,000,000) (5,000,000) 0
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument | Other Comprehensive Income (Loss)        
Derivatives, Fair Value [Line Items]        
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred (34,000,000) 2,000,000 (47,000,000) 9,000,000
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument | Investment Income        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 1,000,000 2,000,000 2,000,000 4,000,000
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred 1,000,000 3,000,000 2,000,000 5,000,000
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument | Other Net Realized Capital Gains (Losses)        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net     0  
Foreign exchange contracts | Cash flow hedges | Designated as Hedging Instrument | Gain (Loss) on Investments        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 0 1,000,000   1,000,000
Fixed maturities        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 2,000,000 0 6,000,000 (1,000,000)
Realized capital gains (losses) 2,000,000 0 6,000,000 (1,000,000)
Managed Custody Guarantees        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 2,000,000 (1,000,000) 1,000,000 0
Realized capital gains (losses) 2,000,000 (1,000,000) 1,000,000 0
Stabilizer        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 1,000,000 (1,000,000) 5,000,000 (1,000,000)
Realized capital gains (losses) 1,000,000 (1,000,000) 5,000,000 (1,000,000)
Reinsurance agreements        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net 4,000,000 0 16,000,000 0
Credit contracts | Not Designated as Hedging Instrument        
Derivatives, Fair Value [Line Items]        
Derivative, Gain (Loss) on Derivative, Net $ (1,000,000) $ 0 $ (1,000,000) $ 0