Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019		Sep. 30, 2018
Balances of and changes in DAC [Roll Forward]
Balance, at the beginning of the period	$ 2,776		$ 2,676
Capitalization of acquisition costs	226		241
Amortization, excluding the impact of valuation assumptions review	(172)		(213)
Amortization, impact of valuation assumptions review	(14)		33
Impact of change in net unrealized (gains) losses on securities	(175)		95
Reclassified to assets held for sale	(15)	[1]	0
Balance, at the end of the period	2,626		2,832
Balances of and changes in DSIC [Roll Forward]
Balance at the beginning of the period	251		276
Capitalization of sales inducement costs	1		2
Amortization, excluding the impact of valuation assumptions review	(13)		(26)
Amortization, impact of valuation assumptions review	0		0
Impact of change in net unrealized (gains) losses on securities	(21)		16
Balance at the end of the period	$ 218		$ 268

[1] See Note 15 for additional information on held for sale classification.