Debt - Balances and Stated Interest Rates (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt and stated interest rates
Short-term borrowings	$ 201	$ 201
Ameriprise Financial
Debt and stated interest rates
Finance lease liabilities	17	20
Other	(19)	(21)
Total long-term debt	3,398	3,399
Short-term borrowings	201	201
Total	$ 3,599	$ 3,600
Ameriprise Financial | Weighted average
Debt and stated interest rates
FHLB advances, Stated interest rate (as a percent)	5.50%	5.60%
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	$ 600
Stated interest rate long-term debt (as a percent)	5.70%	5.70%
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	$ 750
Stated interest rate long-term debt (as a percent)	5.20%	5.20%