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Investments Investments (EITF info-Fair value) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value [Line Items] |  |
Less than 12 months | $ 6,637 | $ 10,445
12 months or more | 1,936 | 6,322
Total | 8,573 | 16,767
Corporate debt securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 66 | 5,522
12 months or more | 173 | 1,717
Total | 239 | 7,239
Residential mortgage backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 4,328 | 2,029
12 months or more | 1,164 | 2,132
Total | 5,492 | 4,161
Commercial mortgage backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 1,622 | 2,062
12 months or more | 314 | 1,806
Total | 1,936 | 3,868
Asset backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 598 | 491
12 months or more | 213 | 396
Total | 811 | 887
State and municipal obligations [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 23 | 255
12 months or more | 57 | 254
Total | 80 | 509
Foreign government bonds and obligations [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 0 | 86
12 months or more | 15 | 17
Total | $ 15 | $ 103

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