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Investments (AFS contractual maturity) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 2,471 |
Due after one year through five years | 4,723 |
Due after five years through 10 years | 2,667 |
Due after 10 years | 4,076 |
Total having single maturity dates | 13,937 |
Amortized cost | 31,332 | $ 30,671
Fair Value |  |
Due within one year | 2,476 |
Due after one year through five years | 4,900 |
Due after five years through 10 years | 2,890 |
Due after 10 years | 5,265 |
Total having single maturity dates | 15,531 |
Fair value | 33,129 | 31,058
Residential mortgage backed securities [Member] |  |
Amortized Cost |  |
Without single maturity dates | 9,954 |
Amortized cost | 9,954 | 6,373
Fair Value |  |
Without single maturity dates | 10,029 |
Fair value | 10,029 | 6,329
Commercial mortgage backed securities [Member] |  |
Amortized Cost |  |
Without single maturity dates | 5,473 |
Amortized cost | 5,473 | 4,975
Fair Value |  |
Without single maturity dates | 5,563 |
Fair value | 5,563 | 4,877
Asset backed securities [Member] |  |
Amortized Cost |  |
Without single maturity dates | 1,968 |
Amortized cost | 1,968 | 1,373
Fair Value |  |
Without single maturity dates | 2,006 |
Fair value | $ 2,006 | $ 1,398

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