v3.26.1
Market Risk Benefits - Significant Inputs and Assumptions (Details)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Market Risk Benefit [Line Items]            
Market risk benefits $ (1,092) $ (1,343) $ (575) $ (769) $ (114) $ (919)
Utilization of guaranteed withdrawals            
Market Risk Benefit [Line Items]            
Increase (decrease) in net income from change in assumptions (14)          
Surrender rate            
Market Risk Benefit [Line Items]            
Increase (decrease) in net income from change in assumptions $ (70)          
Discounted Cash Flow | Nonperformance risk            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.0065 0.0060        
Minimum | Discounted Cash Flow | Utilization of guaranteed withdrawals            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.000 0.000        
Minimum | Discounted Cash Flow | Surrender rate            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.004 0.004        
Minimum | Discounted Cash Flow | Market volatility            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.000 0.000        
Minimum | Discounted Cash Flow | Mortality rate            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.000 0.000        
Maximum | Discounted Cash Flow | Utilization of guaranteed withdrawals            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.528 0.528        
Maximum | Discounted Cash Flow | Surrender rate            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.750 0.750        
Maximum | Discounted Cash Flow | Market volatility            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.249 0.254        
Maximum | Discounted Cash Flow | Mortality rate            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.416 0.416        
Weighted average | Discounted Cash Flow | Utilization of guaranteed withdrawals            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.122 0.119        
Weighted average | Discounted Cash Flow | Surrender rate            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.036 0.037        
Weighted average | Discounted Cash Flow | Market volatility            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.112 0.116        
Weighted average | Discounted Cash Flow | Nonperformance risk            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.0065 0.0060        
Weighted average | Discounted Cash Flow | Mortality rate            
Market Risk Benefit [Line Items]            
Market risk benefits, measurement input 0.018 0.017