Debt - Short-term Borrowings (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 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	$ 1,100	$ 1,100
Federal Reserve borrowings \| Ameriprise Bank, FSB
Short-term borrowings
Short-term borrowings	$ 0	$ 0

Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents 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.

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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.

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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.

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