Regulatory Requirements - Bank Regulatory Capital (Details) - Subsidiaries - Ameriprise Bank - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Regulatory capital
Common equity Tier 1 capital, Actual Amount	$ 853	$ 657
Tier 1 capital, Actual Amount	853	657
Total Capital, Actual Amount	855	658
Tier 1 leverage, Actual Amount	$ 853	$ 657
Common equity Tier 1 Capital Actual Ratio (as a percent)	29.54%	12.08%
Tier 1 capital, Actual Ratio (as a percent)	29.54%	12.08%
Total capital, Actual Ratio (as a percent)	29.60%	12.10%
Tier 1 leverage, Actual Ratio (as a percent)	7.24%	8.36%
Common equity Tier 1, Requirement for capital adequacy, Amount	$ 130	$ 245
Tier 1 capital, Requirement for capital adequacy, Amount	173	326
Total capital, Requirement for capital adequacy, Amount	231	435
Tier 1 leverage, Requirement for capital adequacy, Amount	$ 471	$ 314
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	$ 188	$ 353
Tier 1 capital, To be well capitalized, Amount	231	435
Total capital, To be well capitalized, Amount	289	543
Tier 1 leverage, To be well capitalized, Amount	$ 589	$ 393
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%