Customer Deposits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Customer Deposits [Abstract]
Percentage of participation in the market index in the first option	100.00%
Percentage of participation in the market index in the second option	25.00%
Minimum [Member]
Customer Deposits [Abstract]
Amount of fixed rate investment certificates	$ 1,000
Term of fixed rate investment certificates	3 months
Returns on current first term stock market certificates (as a percent)	2.50%
Maximum [Member]
Customer Deposits [Abstract]
Amount of fixed rate investment certificates	$ 2,000,000
Term of fixed rate investment certificates	48 months
Returns on current first term stock market certificates (as a percent)	13.00%
Ameriprise Financial [Member]
Customer Deposits [Abstract]
Fixed rate certificates	$ 7,377,000,000	$ 5,837,000,000
Stock market certificates	476,000,000	520,000,000
Stock market embedded derivative reserve	6,000,000	10,000,000
Other	33,000,000	33,000,000
Less: accrued interest classified in other liabilities	(7,000,000)	(12,000,000)
Total investment certificate reserves	7,885,000,000	6,388,000,000
Brokerage customer deposits	3,660,000,000	3,915,000,000
Total	$ 11,545,000,000	$ 10,303,000,000