Regulatory Requirements - Bank Regulatory Capital (Details) - Subsidiaries - Ameriprise Bank - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Regulatory capital
Common equity Tier 1 capital, Actual Amount	$ 1,715	$ 1,542
Tier 1 capital, Actual Amount	1,715	1,542
Total capital, Actual Amount	1,724	1,546
Tier 1 leverage, Actual Amount	$ 1,715	$ 1,542
Common equity Tier 1 capital, Actual Ratio (as a percent)	31.72%	30.18%
Tier 1 capital, Actual Ratio (as a percent)	31.72%	30.18%
Total capital, Actual Ratio (as a percent)	31.89%	30.26%
Tier 1 leverage, Actual Ratio (as a percent)	7.44%	7.72%
Common equity Tier 1, Requirement for capital adequacy, Amount	$ 243	$ 230
Tier 1 capital, Requirement for capital adequacy, Amount	324	307
Total capital, Requirement for capital adequacy, Amount	433	409
Tier 1 leverage, Requirement for capital adequacy, Amount	$ 922	$ 799
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	$ 351	$ 332
Tier 1 capital, To be well capitalized, Amount	433	409
Total capital, To be well capitalized, Amount	541	511
Tier 1 leverage, To be well capitalized, Amount	$ 1,153	$ 999
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%