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Commitments and Contingent Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Commitments and Contingent Liabilities [Line Items]    
Fair value of collateral supporting these assets $ 240 $ 702
Other assets:    
Premium tax offset for future undiscounted assessments 35 37
Premium tax offset currently available for paid assessments 2 2
Total 37 39
Other liabilities:    
Insolvency assessments 29 29
Guarantee on letters of credit 2,300  
Standby Letters of Credit    
Other liabilities:    
Guarantee on letters of credit 1,500  
Standby Uncommitted Letters Of Credit    
Other liabilities:    
Guarantee on letters of credit 500  
Commitments | Commercial Mortgage Loans    
Commitments and Contingent Liabilities [Line Items]    
Total outstanding mortgage loan commitments 1,798 1,995
Portion of commitment where prearrangement to sell to investor exists 366 582
Allowance for credit losses 1 1
Change in allowance for credit losses 0 0
Expected to be funded from the GA and other operations outside the SA    
Commitments and Contingent Liabilities [Line Items]    
Commitments to Purchase Investment (excluding Commercial Mortgage Loans) 10,675 8,376
Expected to be funded from separate accounts    
Commitments and Contingent Liabilities [Line Items]    
Commitments to Purchase Investment (excluding Commercial Mortgage Loans) 39 183
Indemnification | Securities Lending and Securities Repurchase Transactions    
Commitments and Contingent Liabilities [Line Items]    
Indemnification provided to certain clients for securities lending and securities repurchase transactions 5,409 5,834
Fair value of related collateral associated with above indemnifications 5,528 5,985
Accrued Liability associated with guarantee 0 0
Indemnification | Securities Repurchase Transactions    
Commitments and Contingent Liabilities [Line Items]    
Indemnification provided to certain clients for securities lending and securities repurchase transactions 0 0
Fair value of related collateral associated with above indemnifications 0 0
Indemnification | Serviced Mortgage Loans    
Commitments and Contingent Liabilities [Line Items]    
Maximum exposure under indemnification agreements for mortgage loans serviced by the Company 3,102 2,972
First-loss exposure portion of above 898 862
Accrued Liability associated with guarantee 28 33
Allowance for credit losses 14 17
Change in allowance for credit losses (3) (3)
Guarantee of Asset Values    
Commitments and Contingent Liabilities [Line Items]    
Guaranteed value of third parties’ assets 78,009 84,338
Fair value of collateral supporting these assets 73,186 77,693
Asset (liability) associated with guarantee, carried at fair value (2)  
Asset (liability) associated with guarantee, carried at fair value   1
Other Guarantees    
Commitments and Contingent Liabilities [Line Items]    
Other guarantees where amount can be determined 36 57
Accrued Liability associated with guarantee 32 33
Purchase Investments    
Commitments and Contingent Liabilities [Line Items]    
Change in allowance for credit losses $ 0 $ 0