Debt - Balances and Stated Interest Rates (Details) - USD ($) $ in Millions	Dec. 31, 2023	Nov. 09, 2023	Oct. 16, 2023	Mar. 09, 2023	Dec. 31, 2022
Debt and stated interest rates
Finance lease liabilities	$ 20				$ 30
Short-term borrowings	201				201	[1]
Ameriprise Financial
Debt and stated interest rates
Finance lease liabilities	20				30
Other	(21)				(9)
Total long-term debt	3,399				2,821
Short-term borrowings	201				201
Total	$ 3,600				$ 3,022
Ameriprise Financial | Weighted average
Debt and stated interest rates
FHLB advances, Stated interest rate	5.60%				4.60%
Ameriprise Financial | Senior notes due 2023
Debt and stated interest rates
Long-term debt	$ 0				$ 750
Stated interest rate long-term debt (as a percent)	0.00%		4.00%		4.00%
Ameriprise Financial | Senior notes due 2024
Debt and stated interest rates
Long-term debt	$ 550				$ 550
Stated interest rate long-term debt (as a percent)	3.70%				3.70%
Ameriprise Financial | Senior notes due 2025
Debt and stated interest rates
Long-term debt	$ 500				$ 500
Stated interest rate long-term debt (as a percent)	3.00%				3.00%
Ameriprise Financial | Senior notes due 2026
Debt and stated interest rates
Long-term debt	$ 500				$ 500
Stated interest rate long-term debt (as a percent)	2.90%				2.90%
Ameriprise Financial | Senior notes due 2028
Debt and stated interest rates
Long-term debt	$ 600				$ 0
Stated interest rate long-term debt (as a percent)	5.70%	5.70%			0.00%
Ameriprise Financial | Senior notes due 2032
Debt and stated interest rates
Long-term debt	$ 500				$ 500
Stated interest rate long-term debt (as a percent)	4.50%				4.50%
Ameriprise Financial | Senior notes due 2033
Debt and stated interest rates
Long-term debt	$ 750				$ 0
Stated interest rate long-term debt (as a percent)	5.20%			5.15%	0.00%

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