Regulatory Requirements - Bank Regulatory Capital (Details) - Subsidiaries - Ameriprise Bank - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Regulatory capital
Common equity Tier 1 capital, Actual Amount	$ 1,542	$ 853
Tier 1 capital, Actual Amount	1,542	853
Total capital, Actual Amount	1,546	855
Tier 1 leverage, Actual Amount	$ 1,542	$ 853
Common equity Tier 1 capital, Actual Ratio (as a percent)	30.18%	29.54%
Tier 1 capital, Actual Ratio (as a percent)	30.18%	29.54%
Total capital, Actual Ratio (as a percent)	30.26%	29.60%
Tier 1 leverage, Actual Ratio (as a percent)	7.72%	7.24%
Common equity Tier 1, Requirement for capital adequacy, Amount	$ 230	$ 130
Tier 1 capital, Requirement for capital adequacy, Amount	307	173
Total capital, Requirement for capital adequacy, Amount	409	231
Tier 1 leverage, Requirement for capital adequacy, Amount	$ 799	$ 471
Common equity Tier 1 capital, Requirement for capital adequacy, Ratio (as a percent)	4.50%	4.50%
Tier 1 capital, Requirement for capital adequacy, Ratio (as a percent)	6.00%	6.00%
Total capital, Requirement for capital adequacy, Ratio (as a percent)	8.00%	8.00%
Tier 1 leverage, Requirement for capital adequacy, Ratio (as a percent)	4.00%	4.00%
Common equity Tier 1 capital, To be well capitalized, Amount	$ 332	$ 188
Tier 1 capital, To be well capitalized, Amount	409	231
Total capital, To be well capitalized, Amount	511	289
Tier 1 leverage, To be well capitalized, Amount	$ 999	$ 589
Common equity Tier 1 capital, To be well capitalized, Ratio (as a percent)	6.50%	6.50%
Tier 1 capital, To be well capitalized, Ratio (as a percent)	8.00%	8.00%
Total capital, To be well capitalized, Ratio (as a percent)	10.00%	10.00%
Tier 1 leverage, To be well capitalized, Ratio (as a percent)	5.00%	5.00%