v3.25.2
Derivative Financial Instruments - Effect of Derivatives (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]        
Net investment income $ 584 $ 518 $ 1,144 $ 1,047
Net gains (losses) (41) (4) (75) 39
Gain (loss) on derivative, net (11) 40 (48) 173
Not Designated as Hedging Instrument | Credit contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net (1) 0 (1) (1)
Interest rate contracts | Not Designated as Hedging Instrument        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net (30) 39 (77) 165
Interest rate contracts | Cash Flow Hedging | Designated as Hedging Instrument | Other Comprehensive Income (Loss)        
Derivative Instruments, Gain (Loss) [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 Hedging | Designated as Hedging Instrument | Net investment income        
Derivative Instruments, Gain (Loss) [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 | Net investment income        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 0 0 0
Interest rate contracts | Fair Value Hedging | Net gains (losses)        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 1 0 1
Interest rate contracts | Fair Value Hedging | Designated as Hedging Instrument | Net investment income        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 0 0 0
Interest rate contracts | Fair Value Hedging | Designated as Hedging Instrument | Net gains (losses)        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 (1) 0 (1)
Foreign exchange contracts | Not Designated as Hedging Instrument        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 (1) 5 (3)
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Other Comprehensive Income (Loss)        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred (41) 3 (57) 11
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Net investment income        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 1 2 3 5
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred 1 3 3 6
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Net gains (losses)        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 1 0 1
Foreign exchange contracts | Fair Value Hedging | Net investment income        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 0 0 0
Foreign exchange contracts | Fair Value Hedging | Net gains (losses)        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 9 0 13 (2)
Foreign exchange contracts | Fair Value Hedging | Designated as Hedging Instrument | Net investment income        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 0 0 0
Foreign exchange contracts | Fair Value Hedging | Designated as Hedging Instrument | Net gains (losses)        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net (9) 1 (13) 4
Embedded derivatives within reinsurance        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 0 4 5 4
Embedded derivatives within reinsurance | Level 3 | Measured at fair value on a recurring basis        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in derivative instruments excluded from assessment of hedge effectiveness and recognized in earnings 1 0 1 1
Gains (losses) from standalone derivatives recognized in Net gains (losses) 10 0 11 1
Equity contracts | Not Designated as Hedging Instrument        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) on derivative, net 14 1 7 11
Fixed maturities        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) 3 (1) 7 (2)
Gain (loss) on derivative, net 3 (1) 7 (2)
Managed Custody Guarantees        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) 2 (1) 1 0
Gain (loss) on derivative, net 2 (1) 1 0
Managed custody guarantees        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gains (losses) 1 (1) 5 (1)
Gain (loss) on derivative, net 1 (1) $ 5 $ (1)
Managed custody guarantees | Level 3 | Measured at fair value on a recurring basis        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) from standalone derivatives recognized in Net gains (losses) $ 4 $ (2)