v3.26.3
Investments - Summary of Maximum Loss Exposure (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Variable Interest Entity [Line Items]    
Assets $ 477,571 $ 442,205
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 169,220 151,286
Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Assets 149,451 135,174
Variable Interest Entity, Not Primary Beneficiary | Investment funds    
Variable Interest Entity [Line Items]    
Assets 29,034 24,070
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 34,702 29,991
Variable Interest Entity, Not Primary Beneficiary, Consolidated Entity Exclude Affiliated | Investment funds    
Variable Interest Entity [Line Items]    
Assets 350 108
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 653 458
Variable Interest Entity, Not Primary Beneficiary, Consolidated Entity Exclude Affiliated | Fixed maturity securities    
Variable Interest Entity [Line Items]    
Assets 81,144 84,397
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 86,600 87,995
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Investment funds    
Variable Interest Entity [Line Items]    
Assets 3,291 2,149
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 4,484 5,859
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Fixed maturity securities    
Variable Interest Entity [Line Items]    
Assets 35,632 24,184
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 42,781 26,717
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Equity securities    
Variable Interest Entity [Line Items]    
Assets 0 266
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount $ 0 $ 266