v3.26.1
Long-duration Contracts - Significant Inputs and Assumptions (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Market Risk Benefit [Line Items]        
Net liability $ 5,114 $ 4,716 $ 4,212 $ 3,715
Nonperformance risk | Discounted cash flow | Minimum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.003   0.003  
Nonperformance risk | Discounted cash flow | Maximum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.011   0.011  
Nonperformance risk | Discounted cash flow | Weighted average        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.009   0.010  
Option budget | Discounted cash flow | Minimum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.005   0.005  
Option budget | Discounted cash flow | Maximum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.059   0.060  
Option budget | Discounted cash flow | Weighted average        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.027   0.025  
Surrender rate | Discounted cash flow | Minimum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.040   0.031  
Surrender rate | Discounted cash flow | Maximum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.075   0.067  
Surrender rate | Discounted cash flow | Weighted average        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.051   0.044  
Measurement Input, Utilization Rate | Discounted cash flow | Minimum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.286   0.286  
Measurement Input, Utilization Rate | Discounted cash flow | Maximum        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.950   0.950  
Measurement Input, Utilization Rate | Discounted cash flow | Weighted average        
Market Risk Benefit [Line Items]        
Market risk benefit, measurement input (in percent) 0.867   0.854