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Investments - Summary (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Summary of investments        
Allowance for credit losses $ 59 $ 59 $ 48 $ 50
Ameriprise Financial        
Summary of investments        
Available-for-Sale securities, at fair value 44,883 40,811    
Mortgage loans (allowance for credit losses: 2023, $13; 2022, $12) 1,997 1,987    
Policy loans 861 847    
Other investments (allowance for credit losses: 2023, $6; 2022, $5) 867 879    
Total 48,608 44,524 [1]    
Ameriprise Financial | Mortgage loans        
Summary of investments        
Allowance for credit losses 13 12    
Ameriprise Financial | Other investments        
Summary of investments        
Allowance for credit losses $ 6 $ 5    
[1] Certain prior period amounts have been restated. See Note 3 for more information.