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Investments Investments (EITF info-Fair value) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value [Line Items] |  |
Less than 12 months | $ 3,368 | $ 10,445
12 months or more | 2,186 | 6,322
Total | 5,554 | 16,767
Corporate debt securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 135 | 5,522
12 months or more | 407 | 1,717
Total | 542 | 7,239
Residential mortgage backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 1,933 | 2,029
12 months or more | 1,201 | 2,132
Total | 3,134 | 4,161
Commercial mortgage backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 1,054 | 2,062
12 months or more | 278 | 1,806
Total | 1,332 | 3,868
Asset backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 237 | 491
12 months or more | 195 | 396
Total | 432 | 887
State and municipal obligations [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 4 | 255
12 months or more | 79 | 254
Total | 83 | 509
Foreign government bonds and obligations [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 5 | 86
12 months or more | 26 | 17
Total | $ 31 | $ 103

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