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Regulatory Requirements - Bank Regulatory Capital (Details) - Subsidiaries - Ameriprise Bank - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Regulatory capital    
Common equity Tier 1 capital, Actual Amount $ 1,763 $ 1,715
Tier 1 capital, Actual Amount 1,763 1,715
Total capital, Actual Amount 1,772 1,724
Tier 1 leverage, Actual Amount $ 1,763 $ 1,715
Common equity Tier 1 capital, Actual Ratio (as a percent) 33.88% 31.72%
Tier 1 capital, Actual Ratio (as a percent) 33.88% 31.72%
Total capital, Actual Ratio (as a percent) 34.06% 31.89%
Tier 1 leverage, Actual Ratio (as a percent) 7.35% 7.44%
Common equity Tier 1, Requirement for capital adequacy, Amount $ 234 $ 243
Tier 1 capital, Requirement for capital adequacy, Amount 312 324
Total capital, Requirement for capital adequacy, Amount 416 433
Tier 1 leverage, Requirement for capital adequacy, Amount $ 959 $ 922
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 $ 338 $ 351
Tier 1 capital, To be well capitalized, Amount 416 433
Total capital, To be well capitalized, Amount 520 541
Tier 1 leverage, To be well capitalized, Amount $ 1,199 $ 1,153
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%