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Insurance (Separate Accounts - Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Schedule Separate Accounts [Line Items]    
Separate account assets $ 146,038 $ 179,873
Funding Agreements and Participating Close Out Contracts Included in Separate Accounts with a Guaranteed Minimum Return or Account Value    
Schedule Separate Accounts [Line Items]    
Average interest rate credited on separate accounts with a guaranteed minimum return or account value 2.49% 2.18%
Pass Through Separate Accounts    
Schedule Separate Accounts [Line Items]    
Separate account assets $ 108,900 $ 134,400
Separate Accounts With Minimum Return Or Account Value    
Schedule Separate Accounts [Line Items]    
Separate account assets $ 37,100 $ 45,500