Debt - Long-Term Debt (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 16, 2023	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021	[1]	Nov. 09, 2023	Mar. 09, 2023
Debt and stated interest rates
Repayments of long-term debt		$ 760	$ 510	[1]	$ 9
Senior notes due 2033 | Ameriprise Financial
Debt and stated interest rates
Debt issued								$ 750
Stated interest rate long-term debt (as a percent)		5.20%	0.00%					5.15%
Debt issuance costs								$ 7
Senior notes due 2023 | Ameriprise Financial
Debt and stated interest rates
Stated interest rate long-term debt (as a percent)	4.00%	0.00%	4.00%
Repayments of long-term debt	$ 750
Senior notes due 2028 | Ameriprise Financial
Debt and stated interest rates
Debt issued							$ 600
Stated interest rate long-term debt (as a percent)		5.70%	0.00%				5.70%
Debt issuance costs							$ 6

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