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Investments (AFS contractual maturity) (Details 8) - Ameriprise Financial [Member] - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Amortized cost |  |
Due within one year | $ 2,880 |
Due after one year through five years | 4,800 |
Due after five years through 10 years | 2,940 |
Due after 10 years | 4,194 |
Total having single maturity dates | 14,814 |
Amortized cost | 29,091 | $ 30,671
Fair value |  |
Due within one year | 2,885 |
Due after one year through five years | 4,937 |
Due after five years through 10 years | 3,133 |
Due after 10 years | 5,200 |
Total having single maturity dates | 16,155 |
Fair value | 30,642 | 31,058
Residential mortgage backed securities [Member] |  |
Amortized cost |  |
Without single maturity dates | 7,697 |
Amortized cost | 7,697 | 6,373
Fair value |  |
Without single maturity dates | 7,770 |
Fair value | 7,770 | 6,329
Commercial mortgage backed securities [Member] |  |
Amortized cost |  |
Without single maturity dates | 5,071 |
Amortized cost | 5,071 | 4,975
Fair value |  |
Without single maturity dates | 5,158 |
Fair value | 5,158 | 4,877
Asset backed securities [Member] |  |
Amortized cost |  |
Without single maturity dates | 1,509 |
Amortized cost | 1,509 | 1,373
Fair value |  |
Without single maturity dates | 1,559 |
Fair value | $ 1,559 | $ 1,398

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