Regulatory Requirements (Table) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual	$ 657	$ 300
Banking Regulation, Tier One Risk-Based Capital, Actual	657	300
Banking Regulation, Total Capital, Actual	658	300
Banking Regulation, Tier One Leverage Capital, Actual	$ 657	$ 300
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	12.08%	16.64%
Banking Regulation, Tier One Leverage Capital Ratio, Actual	12.08%	16.64%
Banking Regulation, Total Risk-Based Capital Ratio, Actual	12.10%	16.66%
Banking Regulation, Excess Tier One Leverage Capital Ratio, Actual	8.36%	8.75%
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 245	$ 81
Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum	326	108
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	435	144
Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum	$ 314	$ 137
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	4.50%	4.50%
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	6.00%	6.00%
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	8.00%	8.00%
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	4.00%	4.00%
Banking Regulation, Common Equity Tier One Risk-Based Capital, Well Capitalized, Minimum	$ 353	$ 117
Banking Regulation, Tier One Risk-Based Capital, Well Capitalized, Minimum	435	144
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum	543	180
Banking Regulation, Tier One Leverage Capital, Well Capitalized, Minimum	$ 393	$ 171
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	6.50%	6.50%
Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	8.00%	8.00%
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	10.00%	10.00%
Banking Regulation, Tier One Leverage Capital Ratio, Well Capitalized, Minimum	5.00%	5.00%
Net capital as a percent of aggregate debit items
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Ameriprise Enterprise Investment Services Inc., percentage	9.51%	12.08%
Net capital
Statutory Accounting Practices [Line Items]
Ameriprise Enterprise Investment Services Inc.	$ 122	$ 133
Ameriprise Financial Services, Inc.	134	94
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Ameriprise Financial Services, Inc.	134	94
Ameriprise Enterprise Investment Services Inc.	122	133
Required Net Capital
Statutory Accounting Practices [Line Items]
Ameriprise Enterprise Investment Services Inc.	25	22
Ameriprise Financial Services, Inc.	0	0
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Ameriprise Financial Services, Inc.	0	0
Ameriprise Enterprise Investment Services Inc.	25	22
Excess Net Capital
Statutory Accounting Practices [Line Items]
Ameriprise Enterprise Investment Services Inc.	97	111
Ameriprise Financial Services, Inc.	134	94
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Ameriprise Financial Services, Inc.	134	94
Ameriprise Enterprise Investment Services Inc.	97	111
RiverSource Life [Member]
Statutory Accounting Practices [Line Items]
Statutory net gain from operations	1,393	1,505	$ 1,686
Statutory net income (loss)	$ 1,582	$ 786	$ 1,628

Ameriprise Enterprise Investment Services Inc.

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