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Investments - Available-for-Sale Securities by Contractual Maturity (Details) - Ameriprise Financial - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Amortized cost    
Due within one year $ 2,264  
Due after one year through five years 3,490  
Due after five years through 10 years 5,438  
Due after 10 years 6,529  
Total having single maturity dates 17,721  
Amortized Cost 53,144 $ 53,926
Fair value    
Due within one year 2,266  
Due after one year through five years 3,410  
Due after five years through 10 years 5,468  
Due after 10 years 6,598  
Total having single maturity dates 17,742  
Fair Value 52,574 52,153
Residential mortgage backed securities    
Amortized cost    
Without single maturity dates 27,216  
Amortized Cost 27,216 24,396
Fair value    
Without single maturity dates 26,732  
Fair Value 26,732 23,344
Commercial mortgage backed securities    
Amortized cost    
Without single maturity dates 3,898  
Amortized Cost 3,898 5,339
Fair value    
Without single maturity dates 3,790  
Fair Value 3,790 5,126
Asset backed securities    
Amortized cost    
Without single maturity dates 4,309  
Amortized Cost 4,309 6,451
Fair value    
Without single maturity dates 4,310  
Fair Value $ 4,310 $ 6,442