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Investments - Summary of Fixed Maturity Securities by Rating (Details) - Ameriprise Financial - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Investments |  |
Amortized Cost | $ 53,048 | $ 43,384
Fair Value | 51,562 | 40,811
Fixed maturity securities rated internally | 282 | 270
Holdings of single issuer greater than 10% of equity | 0 | 0
AAA |  |
Investments |  |
Amortized Cost | 25,235 | 30,900
Fair Value | 24,342 | 28,980
AA |  |
Investments |  |
Amortized Cost | 14,013 | 1,219
Fair Value | 13,534 | 1,249
A |  |
Investments |  |
Amortized Cost | 3,073 | 2,080
Fair Value | 3,139 | 2,097
BBB |  |
Investments |  |
Amortized Cost | 10,396 | 8,524
Fair Value | 10,216 | 7,890
Below investment grade |  |
Investments |  |
Amortized Cost | 331 | 661
Fair Value | 331 | 595
CLOs | Below investment grade |  |
Investments |  |
Amortized Cost | 1 | 1
Fair Value | $ 1 | $ 1
Total investments | Credit concentration risk |  |
Investments |  |
Concentration risk | 93.00% | 92.00%
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 | 47.00% | 71.00%
Fixed maturity securities | Credit concentration risk | AA |  |
Investments |  |
Percentage of total | 26.00% | 3.00%
Fixed maturity securities | Credit concentration risk | A |  |
Investments |  |
Percentage of total | 6.00% | 5.00%
Fixed maturity securities | Credit concentration risk | BBB |  |
Investments |  |
Percentage of total | 20.00% | 19.00%
Fixed maturity securities | Credit concentration risk | Below investment grade |  |
Investments |  |
Percentage of total | 1.00% | 2.00%
Fixed maturity securities | Credit concentration risk | GNMA, FNMA and FHLMC mortgage backed securities. | AAA |  |
Investments |  |
Concentration risk |  | 30.00%
Fixed maturity securities | Credit concentration risk | GNMA, FNMA and FHLMC mortgage backed securities. | AA |  |
Investments |  |
Concentration risk | 83.00% |

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