Financing Receivables (Credit Quality Information Text) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonperforming loans	$ 29	$ 25
Commercial mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonperforming loans	$ 0
Percentage of commercial mortgage loans with highest risk rating less than %	1.00%
Total loans, gross	$ 2,816	2,797
Impaired Financing Receivable, Unpaid Principal Balance	$ 369
Financing Receivable, Modifications, Number of Contracts | loan	93
Syndicated loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, gross	$ 553	543
Syndicated loans [Member] | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonperforming loans	0	1
Loans to financial advisors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans, gross	672
Allowance for loan losses related to loans to financial advisors no longer affiliated with Ameriprise Financial	$ 10	$ 10
Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit Card Receivable Percent Past Due	1.00%	2.00%