Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Balances of and changes in DAC [Roll Forward]
Balance, at the beginning of the period	$ 2,532	$ 2,698
Capitalization of acquisition costs	65	60
Amortization, excluding the impact of valuation assumptions review	(5)	(512)
Impact of change in net unrealized (gains) losses on securities	93	118
Balance, at the end of the period	2,685	2,364
Balances of and changes in DSIC [Roll Forward]
Balance at the beginning of the period	189	218
Amortization, excluding the impact of valuation assumptions review	(3)	(36)
Impact of change in net unrealized (gains) losses on securities	4	15
Balance at the end of the period	$ 190	$ 197