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Other Intangible Assets - DSI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Movement in Deferred Sales Inducements [Roll Forward]      
DSI at beginning of period $ 200 $ 127  
Capitalization 168 87  
Amortization (22) (14) $ (7)
DSI at end of period 346 200 127
FIA      
Movement in Deferred Sales Inducements [Roll Forward]      
DSI at beginning of period 200 127  
Capitalization 168 87  
Amortization (22) (14)  
DSI at end of period $ 346 $ 200 $ 127