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Investments (Holdings info) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Investments, Allowance for Credit Losses | $ 56 | $ 24 | [1]
Investments | 40,737 | 37,915 |
Available-for-sale securities [Member] |  |  |
Investments, Allowance for Credit Losses | 14 | 14 |
Investments | 35,959 | 33,129 |
Mortgage loans, net [Member] |  |  |
Investments, Allowance for Credit Losses | 29 | 19 |
Investments | 2,770 | 2,778 |
Policy and certificate loans [Member] |  |  |
Investments | 849 | 868 |
Other investments [Member] |  |  |
Investments, Allowance for Credit Losses | 13 | 5 |
Investments | $ 1,159 | $ 1,140 |
[1] | Prior to January 1, 2020, the allowance for credit losses is not applicable to Available-for-Sale securities. See Notes 2, 3, 6 and 7 for more information.

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