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Investments (EITF info-Number of securities and unrealized losses) (Details) - Ameriprise Financial [Member] $ in Millions | Sep. 30, 2019 USD ($) Positions | Dec. 31, 2018 USD ($) Positions
--- | --- | ---
Number of securities |  |
Less than 12 months | Positions | 167 | 727
12 months or more | Positions | 215 | 584
Total | Positions | 382 | 1,311
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ (8) | $ (214)
12 months or more | $ | (28) | (243)
Total | $ | $ (36) | $ (457)
Corporate debt securities [Member] |  |
Number of securities |  |
Less than 12 months | Positions | 20 | 345
12 months or more | Positions | 39 | 148
Total | Positions | 59 | 493
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ (2) | $ (152)
12 months or more | $ | (11) | (78)
Total | $ | $ (13) | $ (230)
Residential mortgage backed securities [Member] |  |
Number of securities |  |
Less than 12 months | Positions | 88 | 142
12 months or more | Positions | 113 | 175
Total | Positions | 201 | 317
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ (4) | $ (18)
12 months or more | $ | (8) | (60)
Total | $ | $ (12) | $ (78)
Commercial mortgage backed securities [Member] |  |
Number of securities |  |
Less than 12 months | Positions | 39 | 104
12 months or more | Positions | 30 | 112
Total | Positions | 69 | 216
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ (2) | $ (30)
12 months or more | $ | (1) | (86)
Total | $ | $ (3) | $ (116)
Asset backed securities [Member] |  |
Number of securities |  |
Less than 12 months | Positions | 17 | 38
12 months or more | Positions | 16 | 35
Total | Positions | 33 | 73
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ 0 | $ (6)
12 months or more | $ | (2) | (5)
Total | $ | $ (2) | $ (11)
State and municipal obligations [Member] |  |
Number of securities |  |
Less than 12 months | Positions | 1 | 81
12 months or more | Positions | 4 | 100
Total | Positions | 5 | 181
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ 0 | $ (4)
12 months or more | $ | (3) | (9)
Total | $ | $ (3) | $ (13)
Foreign government bonds and obligations [Member] |  |
Number of securities |  |
Less than 12 months | Positions | 2 | 17
12 months or more | Positions | 13 | 14
Total | Positions | 15 | 31
Unrealized Losses [Abstract] |  |
Less than 12 months | $ | $ 0 | $ (4)
12 months or more | $ | (3) | (5)
Total | $ | $ (3) | $ (9)

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