Earnings per Share Attributable to Ameriprise Financial, Inc. Common Shareholders (Basic & Diluted) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net income attributable to Ameriprise Financial	$ 335	$ 415	$ 699	$ 808
Denominator:
Basic: Weighted-average common shares outstanding	168.3	183.8	170.4	185.1
Effect of potentially dilutive nonqualified stock options and other share-based awards (in shares)	1.8	2.6	1.8	2.6
Diluted: Weighted-average common shares outstanding	170.1	186.4	172.2	187.7
Basic:
Net income (in dollars per share)	$ 1.99	$ 2.26	$ 4.10	$ 4.37
Diluted:
Net income (in dollars per share)	$ 1.97	$ 2.23	$ 4.06	$ 4.30
Effect of potentially dilutive nonqualified stock options and other share-based awards (in shares)			4.9	1.6