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Investments Investments (EITF info-Fair value) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value [Line Items] |  |
investmentgradeAFSsecuritieswithgrossunrealizedlosses | 85.00% |
Ameriprise Financial [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | $ 4,999 | $ 6,637
12 months or more | 1,165 | 1,936
Total | 6,164 | 8,573
Ameriprise Financial [Member] | Corporate debt securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 407 | 66
12 months or more | 40 | 173
Total | 447 | 239
Ameriprise Financial [Member] | Residential mortgage backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 1,774 | 4,328
12 months or more | 800 | 1,164
Total | 2,574 | 5,492
Ameriprise Financial [Member] | Commercial mortgage backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 1,433 | 1,622
12 months or more | 140 | 314
Total | 1,573 | 1,936
Ameriprise Financial [Member] | Asset backed securities [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 1,308 | 598
12 months or more | 171 | 213
Total | 1,479 | 811
Ameriprise Financial [Member] | State and municipal obligations [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 55 | 23
12 months or more | 4 | 57
Total | 59 | 80
Ameriprise Financial [Member] | Foreign government bonds and obligations [Member] |  |
Fair Value [Line Items] |  |
Less than 12 months | 22 | 0
12 months or more | 10 | 15
Total | $ 32 | $ 15

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