Long-Term Debt and Short-term Borrowings (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Debt and stated interest rates
Repayments of Long-term Debt	$ 4	$ 756
Ameriprise Financial
Debt and stated interest rates
Finance lease liabilities	44		$ 44
Other	(11)		(13)
Total long-term debt	2,833		2,831
Short-term borrowings	200		200
Total	3,033		3,031
Ameriprise Financial \| Federal Home Loan Bank ("FHLB") advances
Debt and stated interest rates
Short-term borrowings	$ 200		$ 200
Stated interest rate (as a percent) short-term debt	0.30%		0.40%
Ameriprise Financial \| Federal Home Loan Bank ("FHLB") advances \| Maximum
Debt and stated interest rates
Term	3 months
Ameriprise Financial \| Federal Home Loan Bank ("FHLB") advances \| Commercial mortgage backed securities
Debt and stated interest rates
Securities pledged as collateral	$ 900		$ 1,300
Ameriprise Financial \| Federal Home Loan Bank ("FHLB") advances \| Residential mortgage backed securities
Debt and stated interest rates
Securities pledged as collateral	580		604
Ameriprise Financial \| Senior notes due 2022
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 2023
Debt and stated interest rates
Long-term debt	$ 750		$ 750
Stated interest rate long-term debt (as a percent)	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 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%

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of assets pledged to secure a debt instrument.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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