Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Balances of and changes in DAC [Roll Forward]
Balance, at the beginning of the period	$ 2,676	$ 2,648
Capitalization of acquisition costs	79	67
Amortization	(92)	(72)
Impact of change in net unrealized securities (gains) losses	55	0
Balance, at the end of the period	2,718	2,643
Balances of and changes in DSIC [Roll Forward]
Balance at the beginning of the period	276	302
Capitalization of sales inducement costs	1	2
Amortization	(11)	(9)
Impact of change in net unrealized securities (gains) losses	9	0
Balance at the end of the period	$ 275	$ 295