Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Balances of and changes in DAC
Balance, at the beginning of the period	$ 2,532	$ 2,698
Capitalization of acquisition costs	138	108
Amortization, excluding the impact of valuation assumptions review	(68)	(264)
Impact of change in net unrealized (gains) losses on securities	48	(43)
Balance, at the end of the period	2,650	2,499
Balances of and changes in DSIC
Balance at the beginning of the period	189	218
Capitalization of acquisition costs	1	1
Amortization, excluding the impact of valuation assumptions review	(7)	(18)
Impact of change in net unrealized (gains) losses on securities	5	(5)
Balance at the end of the period	$ 188	$ 196