Debt - Short-term Borrowings (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Federal Home Loan Bank borrowings \| Ameriprise Bank, FSB
Short-term borrowings
Short-term borrowings	$ 0	$ 0
Federal Home Loan Bank borrowings \| Maximum \| RiverSource Life Insurance Company
Short-term borrowings
Term, less than	3 months	3 months
Federal Home Loan Bank borrowings \| Commercial and Residential mortgage backed securities \| RiverSource Life Insurance Company
Short-term borrowings
FHLB advances, securities pledged as collateral	$ 1,000	$ 1,100
Federal Reserve borrowings \| Ameriprise Bank, FSB
Short-term borrowings
Short-term borrowings	$ 0	$ 0

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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- Definition

Amount of the collateral pledged in support of federal home loan bank advances outstanding.

+ References

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-Name Accounting Standards Codification
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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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