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Investments (Holdings info) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Investments | $ 41,031 | $ 37,915
Investments, Allowance for Credit Losses | 52 | 24
Available-for-Sale securities, at fair value [Member] |  |
Investments | 36,283 | 33,129
Mortgage loans, net [Member] |  |
Investments | 2,718 | 2,778
Investments, Allowance for Credit Losses | 29 | 19
Policy and certificate loans [Member] |  |
Investments | 846 | 868
Other investments [Member] |  |
Investments | 1,184 | 1,140
Investments, Allowance for Credit Losses | $ 12 | $ 5

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