Changes in Shareholders' Equity (Details 3) - USD ($) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019
Stock repurchase program, authorized amount	$ 2,500		$ 2,500
Remaining balance under stock repurchase program	$ 2,700
Number of shares reacquired through surrender of restricted shares	0.3	0.3
Value of shares reacquired through surrender of restricted shares	$ 51	$ 34
Number of shares reacquired through net settlement options	0.7	0.5
Aggregate value of shares reacquired through net settlement options	$ 128	$ 70
Treasury shares reissued for restricted stock award grants and Ameriprise Financial Franchise Advisor Deferred Compensation Plan	0.5	0.7
Open market share repurchases [Member]
Repurchase of common shares (in shares)	6.3	9.8
Repurchase of common shares	$ 956	$ 1,300