v3.26.1
Fair Value of Financial Instruments - Schedule of Significant Unobservable Inputs Used for Certain Liability Fair Value Measurements (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, fair value $ 143 $ 152
Net market risk benefits, fair value 368 349
Derivative liabilities, fair value 922 977
Fixed indexed annuities    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefits, fair value 53 52
Variable annuities    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefits, fair value 315 297
Level 3    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, fair value 143 152
Derivative liabilities, fair value 116 107
Level 3 | Fixed indexed annuities    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefits, fair value $ 53  
Level 3 | Fixed indexed annuities | Minimum | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.01  
Level 3 | Fixed indexed annuities | Minimum | GMWB utilization rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.20  
Level 3 | Fixed indexed annuities | Minimum | Non-performance risk (credit spreads)    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.0042  
Level 3 | Fixed indexed annuities | Maximum | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.04  
Level 3 | Fixed indexed annuities | Maximum | GMWB utilization rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 1  
Level 3 | Fixed indexed annuities | Maximum | Non-performance risk (credit spreads)    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.0083  
Level 3 | Fixed indexed annuities | Weighted Average | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.02  
Level 3 | Fixed indexed annuities | Weighted Average | GMWB utilization rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.77  
Level 3 | Fixed indexed annuities | Weighted Average | Non-performance risk (credit spreads)    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.0069  
Level 3 | Variable annuities    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefits, fair value $ 315  
Level 3 | Variable annuities | Minimum | GMWB utilization rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.59  
Level 3 | Variable annuities | Minimum | Non-performance risk (credit spreads)    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.0042  
Level 3 | Variable annuities | Minimum | Lapse rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.02  
Level 3 | Variable annuities | Minimum | Equity index volatility    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.19  
Level 3 | Variable annuities | Maximum | GMWB utilization rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.90  
Level 3 | Variable annuities | Maximum | Non-performance risk (credit spreads)    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.0083  
Level 3 | Variable annuities | Maximum | Lapse rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.11  
Level 3 | Variable annuities | Maximum | Equity index volatility    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.28  
Level 3 | Variable annuities | Weighted Average | GMWB utilization rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.81  
Level 3 | Variable annuities | Weighted Average | Non-performance risk (credit spreads)    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.0069  
Level 3 | Variable annuities | Weighted Average | Lapse rate    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.05  
Level 3 | Variable annuities | Weighted Average | Equity index volatility    
Fair value measurements Significant unobservable inputs [Line Items]    
Net market risk benefit, measurement input 0.24  
Fixed indexed annuity embedded derivatives | Level 3    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, fair value $ 130  
Fixed indexed annuity embedded derivatives | Level 3 | Minimum | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, measurement input 0.01  
Fixed indexed annuity embedded derivatives | Level 3 | Maximum | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, measurement input 0.04  
Fixed indexed annuity embedded derivatives | Level 3 | Weighted Average | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, measurement input 0.02  
Indexed universal life embedded derivatives    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, fair value $ 13 14
Indexed universal life embedded derivatives | Level 3    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, fair value $ 13 14
Indexed universal life embedded derivatives | Level 3 | Minimum | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, measurement input 0.03  
Indexed universal life embedded derivatives | Level 3 | Maximum | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, measurement input 0.11  
Indexed universal life embedded derivatives | Level 3 | Weighted Average | Expected future interest credited    
Fair value measurements Significant unobservable inputs [Line Items]    
Policyholder account balances, measurement input 0.05  
Forward bond purchase commitments    
Fair value measurements Significant unobservable inputs [Line Items]    
Derivative liabilities, fair value $ 116 107
Forward bond purchase commitments | Level 3    
Fair value measurements Significant unobservable inputs [Line Items]    
Derivative liabilities, fair value $ 116 $ 107
Forward bond purchase commitments | Level 3 | Minimum | Counterparty financing spreads    
Fair value measurements Significant unobservable inputs [Line Items]    
Derivative liability, measurement input 0.0014  
Forward bond purchase commitments | Level 3 | Maximum | Counterparty financing spreads    
Fair value measurements Significant unobservable inputs [Line Items]    
Derivative liability, measurement input 0.0045  
Forward bond purchase commitments | Level 3 | Weighted Average | Counterparty financing spreads    
Fair value measurements Significant unobservable inputs [Line Items]    
Derivative liability, measurement input 0.0036