Debt - Long-Term Debt (Details) - USD ($) $ in Millions		9 Months Ended
	Oct. 16, 2023	Sep. 30, 2023	Sep. 30, 2022	[1]	Mar. 09, 2023	Dec. 31, 2022
Debt
Repayments of long-term debt		$ 8	$ 507
Senior notes due 2033 | Ameriprise Financial
Debt
Debt issued					$ 750
Stated interest rate long-term debt (as a percent)		5.20%			5.15%	0.00%
Debt issuance costs					$ 7
Senior notes due 2023 | Ameriprise Financial
Debt
Stated interest rate long-term debt (as a percent)		4.00%				4.00%
Senior notes due 2023 | Ameriprise Financial | Subsequent event
Debt
Stated interest rate long-term debt (as a percent)	4.00%
Repayments of long-term debt	$ 750

[1] Certain prior period amounts have been restated. See Note 3 for more information.