Changes in Shareholders' Equity (Details 3) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock repurchase program, authorized amount	$ 2,500
Remaining balance under stock repurchase program	$ 1,700
Number of shares reacquired through surrender of restricted shares	0.2	0.2
Value of shares reacquired through surrender of restricted shares	$ 39	$ 30
Number of shares reacquired through net settlement options	0.4	1.0
Aggregate value of shares reacquired through net settlement options	$ 56	$ 122
Treasury shares reissued for restricted stock award grants and Ameriprise Financial Franchise Advisor Deferred Compensation Plan	0.8	0.7
Open market share repurchases [Member]
Repurchase of common shares (in shares)	2.4	2.9
Repurchase of common shares	$ 387	$ 357