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Investments - Summary (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Summary of investments      
Allowance for credit losses $ 63 $ 59 $ 50
Ameriprise Financial      
Summary of investments      
Available-for-Sale securities, at fair value 51,562 40,811  
Mortgage loans (allowance for credit losses: 2023, $14; 2022, $12) 2,118 1,987  
Policy loans 912 847  
Other investments (allowance for credit losses: 2023, $6; 2022, $5) 897 879  
Total 55,489 44,524 [1]  
Ameriprise Financial | Mortgage loans      
Summary of investments      
Allowance for credit losses 14 12  
Ameriprise Financial | Other securities      
Summary of investments      
Allowance for credit losses $ 6 $ 5  
[1] Certain prior period amounts have been restated. See Note 3 for more information.