v3.26.3
Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Notional Amount $ 58,923 $ 48,654
Carrying Value / Fair Value of Assets 533 578
Derivative Liability, Fair Value, Gross Liability 1,277 989
Derivative Asset, Subject to Master Netting Arrangement, after Offset 1,032 850
Derivative Liability, Subject to Master Netting Arrangement, after Offset 2,010 1,800
Not Designated as Hedging Instrument    
Derivative [Line Items]    
Notional Amount 41,918 37,677
Carrying Value / Fair Value of Assets 979 794
Derivative Liability, Fair Value, Gross Liability 1,047 1,148
Not Designated as Hedging Instrument | Interest Rate Swaps    
Derivative [Line Items]    
Notional Amount 2,752 2,088
Carrying Value / Fair Value of Assets 9 5
Derivative Liability, Fair Value, Gross Liability 36 14
Not Designated as Hedging Instrument | Foreign Currency Forwards    
Derivative [Line Items]    
Notional Amount 1,480 1,358
Derivative Asset, Subject to Master Netting Arrangement, after Offset 4 1
Derivative Liability, Subject to Master Netting Arrangement, after Offset 22 53
Not Designated as Hedging Instrument | Financial Futures    
Derivative [Line Items]    
Notional Amount 149 200
Carrying Value / Fair Value of Assets 0 0
Derivative Liability, Fair Value, Gross Liability 0 0
Not Designated as Hedging Instrument | Consumer Price Index Swap [Member]    
Derivative [Line Items]    
Notional Amount 366 395
Carrying Value / Fair Value of Assets 4 2
Derivative Liability, Fair Value, Gross Liability 4 7
Not Designated as Hedging Instrument | Synthetic Guaranteed Investment Contracts    
Derivative [Line Items]    
Notional Amount 17,144 17,209
Carrying Value / Fair Value of Assets 0 0
Derivative Liability, Fair Value, Gross Liability 0 0
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements    
Derivative [Line Items]    
Notional Amount 0 0
Carrying Value / Fair Value of Assets 405 272
Derivative Liability, Fair Value, Gross Liability 329 341
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member]    
Derivative [Line Items]    
Notional Amount 0 0
Carrying Value / Fair Value of Assets 94 0
Derivative Liability, Fair Value, Gross Liability 404 470
Not Designated as Hedging Instrument | Currency Swap [Member]    
Derivative [Line Items]    
Notional Amount 150 150
Derivative Asset, Subject to Master Netting Arrangement, after Offset 49 48
Derivative Liability, Subject to Master Netting Arrangement, after Offset 0 0
Not Designated as Hedging Instrument | Interest Rate Swaption    
Derivative [Line Items]    
Notional Amount 1,000 750
Carrying Value / Fair Value of Assets 0 0
Derivative Liability, Fair Value, Gross Liability 0 0
Not Designated as Hedging Instrument | Total Return Swap    
Derivative [Line Items]    
Notional Amount 581 527
Carrying Value / Fair Value of Assets 0 1
Derivative Liability, Fair Value, Gross Liability 24 5
Not Designated as Hedging Instrument | Foreign Exchange Option    
Derivative [Line Items]    
Notional Amount 305 305
Derivative Asset, Subject to Master Netting Arrangement, after Offset 1 0
Derivative Liability, Subject to Master Netting Arrangement, after Offset 0 0
Not Designated as Hedging Instrument | Equity Option    
Derivative [Line Items]    
Notional Amount 6,158 5,897
Carrying Value / Fair Value of Assets 410 459
Derivative Liability, Fair Value, Gross Liability 197 245
Not Designated as Hedging Instrument | Credit Default Swaps    
Derivative [Line Items]    
Notional Amount 7,999 6,573
Carrying Value / Fair Value of Assets 2 3
Derivative Liability, Fair Value, Gross Liability 30 10
Not Designated as Hedging Instrument | Credit Default Option    
Derivative [Line Items]    
Notional Amount 3,500 1,000
Derivative Asset, Subject to Master Netting Arrangement, after Offset 0 0
Derivative Liability, Subject to Master Netting Arrangement, after Offset 0 0
Not Designated as Hedging Instrument | Swap    
Derivative [Line Items]    
Notional Amount 334 1,225
Carrying Value / Fair Value of Assets 1 3
Derivative Liability, Fair Value, Gross Liability 1 3
Designated As Hedging Instrument    
Derivative [Line Items]    
Notional Amount 17,005 10,977
Derivative Asset, Subject to Master Netting Arrangement, after Offset 53 56
Derivative Liability, Subject to Master Netting Arrangement, after Offset 963 652
Designated As Hedging Instrument | Interest Rate Swaps    
Derivative [Line Items]    
Notional Amount 5,186 3,641
Derivative Asset, Subject to Master Netting Arrangement, after Offset 0 31
Derivative Liability, Subject to Master Netting Arrangement, after Offset 187 56
Designated As Hedging Instrument | Foreign Currency Forwards    
Derivative [Line Items]    
Notional Amount 2,388 2,270
Derivative Asset, Subject to Master Netting Arrangement, after Offset 48 12
Derivative Liability, Subject to Master Netting Arrangement, after Offset 12 38
Designated As Hedging Instrument | Currency Swap [Member]    
Derivative [Line Items]    
Notional Amount 1,880 2,008
Derivative Asset, Subject to Master Netting Arrangement, after Offset 5 8
Derivative Liability, Subject to Master Netting Arrangement, after Offset 307 331
Designated As Hedging Instrument | Forward Contracts [Member]    
Derivative [Line Items]    
Notional Amount 7,551 3,058
Derivative Asset, Subject to Master Netting Arrangement, after Offset 0 5
Derivative Liability, Subject to Master Netting Arrangement, after Offset $ 457 $ 227