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Investments - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Schedule of Investments [Line Items]        
Variable Interest Entity, Primary Beneficiary, Maximum Loss Exposure, Amount   $ 0 $ 0  
Proceeds from Sale of Debt Securities, Available-for-sale   14,996 22,457 $ 19,534
Maximum exposure to loss for variable interest   2,600 1,900  
Securities for Reverse Repurchase Agreements   41 30  
Income (Loss) from Equity Method Investments   533 630 244
Equity method investments   3,700    
Commitments to fund limited partnership and alternative investments   $ 2,100    
Aggregate investment income from limited partnerships and other alternative investments   10.00%    
Total assets   $ 73,022 76,578  
Total liabilities   59,391 58,735  
Total net investment income   2,177 2,313 1,846
Net income (loss)   1,815 2,365 1,737
Life and Annuity Insurance Product Line, Run-off Business        
Schedule of Investments [Line Items]        
Equity Method Investment, Realized Gain (Loss) on Disposal $ 46   46  
Proceeds from Sale of Equity Method Investments $ 217      
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Limited Partner [Member]        
Schedule of Investments [Line Items]        
Total assets   289,900 249,800  
Total liabilities   46,800 41,000  
Total net investment income   1,600 2,100 954
Net income (loss)   11,900 46,700 7,400
Variable Interest Entity, Not Primary Beneficiary [Member]        
Schedule of Investments [Line Items]        
Commitments for variable interest   1,800 1,400  
US Treasury Securities [Member]        
Schedule of Investments [Line Items]        
Debt Securities, Available-for-sale, Restricted   7 9  
Fixed maturities        
Schedule of Investments [Line Items]        
Proceeds from Sale of Debt Securities, Available-for-sale   $ 11,400 $ 15,900 $ 15,100