Shareholders' Equity Changes in Stockholders' Equity (Details 3) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2017
Stock repurchase program, authorized amount			$ 2,500	$ 2,500
Remaining balance under stock repurchase program	$ 2,085
Number of shares reacquired through surrender of restricted shares	0.3	0.3	0.4
Value of shares reacquired through surrender of restricted shares	$ 33	$ 29	$ 49
Number of shares reacquired through net settlement of options	2.2	0.5	0.7
Aggregate value of shares reacquired through net settlement of options	$ 298	$ 48	$ 92
Treasury shares reissued for restricted stock award grants and Ameriprise Financial Franchise Advisor Deferred Compensation Plan	0.8	0.9	1.0
Open Market Share Repurchases [Member]
Repurchase of common shares (in shares)	9.9	17.6	13.9
Repurchase of common shares	$ 1,344	$ 1,674	$ 1,674