Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Balances of and changes in DAC
Balance, at the beginning of the period	$ 2,532	$ 2,698
Capitalization of acquisition costs	205	162
Amortization, excluding the impact of valuation assumptions review	(137)	(249)
Amortization, impact of valuation assumptions review	60	(100)
Impact of change in net unrealized (gains) losses on securities	75	(61)
Balance, at the end of the period	2,735	2,450
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	(15)	(19)
Amortization, impact of valuation assumptions review	2	(16)
Impact of change in net unrealized (gains) losses on securities	11	(1)
Balance at the end of the period	$ 188	$ 183