Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Balances of and changes in DAC
Balance at the beginning of the period	$ 2,776	$ 2,676	$ 2,648
Capitalization of acquisition costs	291	318	302
Amortization, excluding the impact of valuation assumptions review	(165)	(355)	(279)
Amortization, impact of valuation assumptions review	(14)	33	12
Impact of change in net unrealized (gains) losses on securities	(175)	104	(7)
Disposal of business	(15)	0	0
Balance at the end of the period	2,698	2,776	2,676
Balances of and changes in DSIC
Balance at the beginning of the period	251	276	302
Capitalization of sales inducement costs	1	2	4
Amortization, excluding the impact of valuation assumptions review	(15)	(43)	(35)
Amortization, impact of valuation assumptions review	0	0	(1)
Impact of change in net unrealized (gains) losses on securities	(19)	16	6
Balance at the end of the period	$ 218	$ 251	$ 276