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Commitments, Guarantees and Contingencies - Guarantees and Guaranty Fund Assessments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Guaranty Fund Assessments    
Estimated liability related to guaranty fund assessments $ 12 $ 12
Related premium tax offset $ 10 $ 10
Minimum    
Loss contingencies    
Minimum interest rate guarantees in fixed accounts 1.00%  
Maximum    
Loss contingencies    
Minimum interest rate guarantees in fixed accounts 5.00%