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Fair Values of Assets and Liabilities - Changes in Level 3 Assets (Details) - Ameriprise Financial - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Available-for-Sale securities |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis |  |  |  |
Balance, beginning | $ 625 | $ 449 | $ 470 | $ 411
Total gains (losses) included in Net income | 1 |  | 1 | 0
Total gains (losses) included in Other comprehensive income (loss) | 17 | (3) | 14 | (2)
Purchases | 72 | 36 | 282 | 114
Settlements | (28) | (18) | (55) | (59)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | (81) |  | (106) |
Balance, ending | 606 | 464 | 606 | 464
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period | 16 | (4) | 13 | (3)
Changes in unrealized gains (losses) included in net income relating to assets held at end of period |  |  | 1 |
Corporate debt securities |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis |  |  |  |
Balance, beginning | 544 | 446 | 469 | 405
Total gains (losses) included in Net income | 1 |  | 1 | 0
Total gains (losses) included in Other comprehensive income (loss) | 16 | (3) | 14 | (2)
Purchases | 44 | 36 | 146 | 114
Settlements | (28) | (18) | (53) | (56)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 0 |  | 0 |
Balance, ending | 577 | 461 | 577 | 461
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period | 16 | (4) | 13 | (3)
Changes in unrealized gains (losses) included in net income relating to assets held at end of period |  |  | 1 |
Residential mortgage backed securities |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis |  |  |  |
Balance, beginning | 57 |  | 0 |
Total gains (losses) included in Net income | 0 |  | 0 |
Total gains (losses) included in Other comprehensive income (loss) | 1 |  | 0 |
Purchases | 27 |  | 112 |
Settlements | 0 |  | (2) |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | (57) |  | (82) |
Balance, ending | 28 |  | 28 |
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period | 0 |  | 0 |
Changes in unrealized gains (losses) included in net income relating to assets held at end of period |  |  | 0 |
Asset backed securities |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis |  |  |  |
Balance, beginning | 24 | 3 | 1 | 6
Total gains (losses) included in Net income | 0 |  | 0 | 0
Total gains (losses) included in Other comprehensive income (loss) | 0 | 0 | 0 | 0
Purchases | 1 | 0 | 24 | 0
Settlements | 0 | 0 | 0 | (3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | (24) |  | (24) |
Balance, ending | 1 | 3 | 1 | 3
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period | 0 | 0 | 0 | 0
Changes in unrealized gains (losses) included in net income relating to assets held at end of period |  |  | 0 |
Fixed deferred indexed annuities ceded embedded derivatives |  |  |  |
Summary of changes in Level 3 assets measured at fair value on a recurring basis |  |  |  |
Balance, beginning | 55 | 49 | 51 | 48
Total gains (losses) included in Net income | 1 |  | 7 | 2
Total gains (losses) included in Other comprehensive income (loss) | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Settlements | (1) | (1) | (3) | (2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 | 0 |  | 0 |
Balance, ending | 55 | 48 | 55 | 48
Changes in unrealized gains (losses) in other comprehensive income (loss) relating to assets held at end of period | $ 0 | $ 0 | 0 | $ 0
Changes in unrealized gains (losses) included in net income relating to assets held at end of period |  |  | $ 0 |

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