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Investments (Rating info) (Details) $ in Millions | Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($) item
--- | --- | ---
Investments |  |  |
Fixed maturity securities as percentage of total investments |  | 88.00% |
Number of holdings other than GNMA, FNMA, and FHLMC having greater than 10% of total equity | item |  | 0 | 0
Holdings of Issuer Other than GNMA, FNMA and FHLMC as Percentage of Shareholders Equity Maximum |  | 10.00% | 10.00%
Ameriprise Financial [Member] |  |  |
Investments |  |  |
Amount of securities internally rated |  | $ 605 | $ 624
Percentage of GNMA, FNMA and FHLMC securities rated AAA |  | 33.00% | 45.00%
Ameriprise Financial [Member] | AAA [Member] |  |  |
Investments |  |  |
Amortized cost |  | $ 19,815 | $ 18,256
Fair value |  | $ 20,253 | $ 18,437
Percent of total fair value |  | 56.00% | 56.00%
Ameriprise Financial [Member] | AA [Member] |  |  |
Investments |  |  |
Amortized cost |  | $ 1,082 | $ 1,113
Fair value |  | $ 1,312 | $ 1,304
Percent of total fair value |  | 3.00% | 4.00%
Ameriprise Financial [Member] | A [Member] |  |  |
Investments |  |  |
Amortized cost |  | $ 2,953 | $ 3,008
Fair value |  | $ 3,534 | $ 3,474
Percent of total fair value |  | 10.00% | 10.00%
Ameriprise Financial [Member] | BBB [Member] |  |  |
Investments |  |  |
Amortized cost |  | $ 8,271 | $ 8,178
Fair value |  | $ 9,542 | $ 9,102
Percent of total fair value |  | 26.00% | 28.00%
Ameriprise Financial [Member] | Below investment grade [Member] |  |  |
Investments |  |  |
Amortized cost | [1] | $ 1,480 | $ 777
Fair value | [1] | $ 1,642 | $ 812
Percent of total fair value |  | 5.00% | 2.00%
Ameriprise Financial [Member] | Fixed Maturities [Member] |  |  |
Investments |  |  |
Amortized cost |  | $ 33,601 | $ 31,332
Fair value |  | $ 36,283 | $ 33,129
Percent of total fair value |  | 100.00% | 100.00%
Ameriprise Financial [Member] | Interest in CLOs managed by the Company [Member] | Below investment grade [Member] |  |  |
Investments |  |  |
Amortized cost |  | $ 3 | $ 5
Fair value |  | $ 3 | $ 6
[1] | The amortized cost and fair value of below investment grade securities includes interest in CLOs managed by the Company of $3 million, as of December 31, 2020, and $5 million and $6 million, respectively, as of December 31, 2019. These securities are not rated but are included in below investment grade due to their risk characteristics.

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- Definition The amount of fixed maturity investments with credit ratings developed internally based on criteria similar to those used by Standard and Poor's, Moody's or Fitch. + References No definition available. + Details
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- Definition This item represents the concentration of holdings (greater than 10% of the entity's total shareholders' equity) in issuers other than GNMA, FNMA and FHLMC mortgage backed securities as of the balance sheet date, if any. + References No definition available. + Details
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