Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Balances of and changes in DAC [Roll Forward]
Balance, at the beginning of the period	$ 2,676	$ 2,648
Capitalization of acquisition costs	164	145
Amortization	(155)	(141)
Impact of change in net unrealized securities (gains) losses	83	(15)
Balance, at the end of the period	2,768	2,637
Balances of and changes in DSIC [Roll Forward]
Balance at the beginning of the period	276	302
Capitalization of sales inducement costs	1	3
Amortization	(20)	(19)
Impact of change in net unrealized securities (gains) losses	14	0
Balance at the end of the period	$ 271	$ 286