v3.26.1
Derivatives Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net $ 400 $ (46)  
Net derivative gains (losses) 400 (46)  
Net Investment Income (3,100) (2,876)  
Net policyholder benefits and claims (7,023) (7,049)  
Interest Credited to PABs (933) (931)  
Net investment gains (losses) (225) (285)  
Net Embedded Derivatives      
Derivative Instruments, Gain (Loss) [Line Items]      
Net derivative gains (losses) 195 (193)  
Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 0 0  
Net Investment Income (2) (21)  
Net policyholder benefits and claims 0 0  
Interest Credited to PABs 0 0  
Net investment gains (losses) 0 0  
Other Comprehensive Income (Loss), before Tax 355 (185)  
Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net Investment Income 0 0  
Net policyholder benefits and claims (4) (4)  
Interest Credited to PABs 0 (2)  
Net investment gains (losses) 0 0  
Other Comprehensive Income (Loss), before Tax 26    
Fixed Maturities [Member] | Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) (61)   $ (73)
Interest rate contracts | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 0 0  
Net Investment Income (1) (20)  
Net policyholder benefits and claims 0 0  
Interest Credited to PABs 0 0  
Net investment gains (losses) 1 0  
Other Comprehensive Income (Loss), before Tax (2) (20)  
Currency Swap [Member] | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 0 0  
Net Investment Income (1) (1)  
Net policyholder benefits and claims 0 0  
Interest Credited to PABs 0 0  
Net investment gains (losses) (211) 348  
Other Comprehensive Income (Loss), before Tax 210 (349)  
Foreign Currency Gain (Loss) [Member] | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 0 0  
Net Investment Income 0 0  
Net policyholder benefits and claims 0 0  
Interest Credited to PABs 0 0  
Net investment gains (losses) 210 (348)  
Other Comprehensive Income (Loss), before Tax 0 0  
Derivative [Member] | Currency Swap [Member] | Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net Investment Income (9) 10  
Net policyholder benefits and claims 0 0  
Interest Credited to PABs (7) (36)  
Net investment gains (losses) 0 0  
Derivative [Member] | Interest Rate Swap [Member] | Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net Investment Income 0 0  
Net policyholder benefits and claims 6 (75)  
Interest Credited to PABs (13) (37)  
Net investment gains (losses) 0 0  
Fixed Maturity Securities | Currency Swap [Member] | Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net Investment Income (9) (10)  
Net policyholder benefits and claims 0 0  
Interest Credited to PABs (7) (36)  
Net investment gains (losses) 0 0  
Fixed Maturity Securities | Interest Rate Swap [Member] | Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net Investment Income 0 0  
Net policyholder benefits and claims 2 (79)  
Interest Credited to PABs (13) (35)  
Net investment gains (losses) 0 0  
Credit forwards | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net   0  
Net Investment Income   0  
Net policyholder benefits and claims   0  
Interest Credited to PABs   0  
Net investment gains (losses)   0  
Other Comprehensive Income (Loss), before Tax   0  
Accumulated Other Comprehensive Income (Loss) | Currency Swap [Member] | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Tax 142 120  
Accumulated Other Comprehensive Income (Loss) | Interest Rate Swap [Member] | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Tax 5 64  
Accumulated Other Comprehensive Income (Loss) | Derivative [Member] | Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Tax 26    
Accumulated Other Comprehensive Income (Loss) | Credit forwards | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Tax 0 0  
Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 150 92  
Net Investment Income 16 17  
Not Designated as Hedging Instrument [Member] | Nonoperating Income (Expense) [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net derivative gains (losses) 54 53  
Net Investment Income (85) (92)  
Net policyholder benefits and claims (7) (2)  
Interest Credited to PABs (38) (39)  
Net investment gains (losses) 0 0  
Other Comprehensive Income (Loss), before Tax 0 0  
Not Designated as Hedging Instrument [Member] | Synthetic GICs [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net derivative gains (losses) 1 2  
Equity Market Risk [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 51 87  
Net Investment Income 16 17  
Foreign Currency Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net (29) 63  
Net Investment Income 0 0  
Interest Rate Risk [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 49 91  
Net Investment Income 0 0  
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 124 (126)  
Net Investment Income 0 0  
Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net 3 (5)  
Net Investment Income 0 0  
Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss) on Derivative, Net (48) (18)  
Net Investment Income 0 0  
Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Net Investment Income (103) (130)  
Net policyholder benefits and claims (3) 2  
Interest Credited to PABs 38 (37)  
Net investment gains (losses) 0 0  
Other Comprehensive Income (Loss), before Tax $ 381 $ (185)