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Investments - Summary (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Summary of investments        
Allowance for credit losses $ 61 $ 59 $ 52 $ 50
Ameriprise Financial        
Summary of investments        
Available-for-Sale securities, at fair value 47,587 40,811    
Mortgage loans (allowance for credit losses: 2023, $14; 2022, $12) 2,033 1,987    
Policy loans 874 847    
Other investments (allowance for credit losses: 2023, $5; 2022, $5) 882 879    
Total 51,376 44,524 [1]    
Ameriprise Financial | Mortgage loans        
Summary of investments        
Allowance for credit losses 14 12    
Ameriprise Financial | Other investments        
Summary of investments        
Allowance for credit losses $ 5 $ 5    
[1] Certain prior period amounts have been restated. See Note 3 for more information.