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Fair Values of Assets and Liabilities (Level 3 rollforwards-Assets) (Details 2) - Ameriprise Financial [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Corporate debt securities [Member] |  |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward] |  |  |  |  |
Balance, at the beginning of the period |  | $ 734 | $ 847 | $ 750 | $ 913
Total gains (losses) included in net income |  | (1) |  | (1) |
Total gains (losses) included in other comprehensive income (loss) |  | 14 | 13 | 8 | 28
Purchases |  |  | 14 | 5 | 14
Settlements |  | (3) | (65) | (18) | (146)
Balance, at the end of the period |  | 744 | 809 | 744 | 809
Changes in unrealized gains (losses) relating to assets held at end of period |  | (1) |  | (1) |
Changes in unrealized gains (losses) OCI relating to assets held at end of period |  | 14 |  | 8 |
Residential mortgage backed securities [Member] |  |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward] |  |  |  |  |
Balance, at the beginning of the period |  | 17 | 37 | 17 | 136
Total gains (losses) included in other comprehensive income (loss) |  | 1 |  | 1 |
Purchases |  | 187 | 417 | 187 | 417
Settlements |  |  | (2) |  | (6)
Transfers out of Level 3 |  |  | (4) |  | (99)
Balance, at the end of the period |  | 205 | 448 | 205 | 448
Changes in unrealized gains (losses) OCI relating to assets held at end of period |  | 1 |  | 1 |
Commercial mortgage backed securities [Member] |  |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward] |  |  |  |  |
Balance, at the beginning of the period |  |  |  |  | 20
Transfers out of Level 3 |  |  |  |  | (20)
Balance, at the end of the period |  |  | 0 |  | 0
Asset backed securities [Member] |  |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward] |  |  |  |  |
Balance, at the beginning of the period |  | 17 | 6 | 19 | 6
Total gains (losses) included in net income |  |  |  | (1) |
Total gains (losses) included in other comprehensive income (loss) |  | (1) |  | (2) |
Purchases |  |  | 18 |  | 18
Settlements |  | (1) |  | (1) |
Balance, at the end of the period |  | 15 | 24 | 15 | 24
Changes in unrealized gains (losses) relating to assets held at end of period |  |  |  | (1) |
Changes in unrealized gains (losses) OCI relating to assets held at end of period |  | (1) |  | (2) |
Available-for-sale securities [Member] |  |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward] |  |  |  |  |
Balance, at the beginning of the period |  | 768 | 890 | 786 | 1,075
Total gains (losses) included in net income | [1] | (1) |  | (2) |
Total gains (losses) included in other comprehensive income (loss) |  | 14 | 13 | 7 | 28
Purchases |  | 187 | 449 | 192 | 449
Settlements |  | (4) | (67) | (19) | (152)
Transfers out of Level 3 |  |  | (4) |  | (119)
Balance, at the end of the period |  | 964 | $ 1,281 | 964 | $ 1,281
Changes in unrealized gains (losses) relating to assets held at end of period | [1] | (1) |  | (2) |
Changes in unrealized gains (losses) OCI relating to assets held at end of period |  | $ 14 |  | $ 7 |
[1] | Included in net investment income in the Consolidated Statements of Operations.

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