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Investments - Summary of Fixed Maturity Securities by Rating (Details) - Ameriprise Financial - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Investments    
Amortized Cost $ 43,384 $ 30,541
Fair Value 40,811 32,050
Fixed maturity securities rated internally 270 400
Holdings of single issuer greater than 10% of equity 0 0
AAA    
Investments    
Amortized Cost 30,900 20,563
Fair Value 28,980 20,625
AA    
Investments    
Amortized Cost 1,219 727
Fair Value 1,249 898
A    
Investments    
Amortized Cost 2,080 1,775
Fair Value 2,097 2,129
BBB    
Investments    
Amortized Cost 8,524 6,495
Fair Value 7,890 7,268
Below investment grade    
Investments    
Amortized Cost 661 981
Fair Value 595 1,130
CLOs | Below investment grade    
Investments    
Amortized Cost 1 1
Fair Value $ 1 $ 2
Total investments | Credit concentration risk | Fixed maturity securities    
Investments    
Percentage of total 92.00% 89.00%
Fixed maturity securities | Credit concentration risk    
Investments    
Percentage of total 100.00% 100.00%
Fixed maturity securities | Credit concentration risk | AAA    
Investments    
Percentage of total 71.00% 64.00%
Fixed maturity securities | Credit concentration risk | AA    
Investments    
Percentage of total 3.00% 3.00%
Fixed maturity securities | Credit concentration risk | A    
Investments    
Percentage of total 5.00% 7.00%
Fixed maturity securities | Credit concentration risk | BBB    
Investments    
Percentage of total 19.00% 23.00%
Fixed maturity securities | Credit concentration risk | Below investment grade    
Investments    
Percentage of total 2.00% 3.00%
Fixed maturity securities | Credit concentration risk | GNMA, FNMA and FHLMC mortgage backed securities. | AAA    
Investments    
Percentage of total 30.00% 30.00%