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Investments - Summary of Maximum Loss Exposure (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]    
Assets $ 269,437 $ 243,931
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 84,793 74,432
Variable Interest Entity, Not Primary Beneficiary [Member]    
Variable Interest Entity [Line Items]    
Assets 70,332 61,578
Variable Interest Entity, Not Primary Beneficiary [Member] | Investment funds    
Variable Interest Entity [Line Items]    
Assets 14,109 12,480
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 20,804 20,278
Variable Interest Entity, Not Primary Beneficiary, Consolidated Entity Exclude Affiliated | Investment funds    
Variable Interest Entity [Line Items]    
Assets 123 79
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 562 340
Variable Interest Entity, Not Primary Beneficiary, Consolidated Entity Exclude Affiliated | AFS securities    
Variable Interest Entity [Line Items]    
Assets 41,220 37,454
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 44,604 40,992
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Investment funds    
Variable Interest Entity [Line Items]    
Assets 1,636 1,569
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 2,374 2,253
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | AFS securities    
Variable Interest Entity [Line Items]    
Assets 12,931 9,717
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 16,136 10,290
Variable Interest Entity, Not Primary Beneficiary, Affiliated Entity | Equity securities    
Variable Interest Entity [Line Items]    
Assets 313 279
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount $ 313 $ 279