Changes in Shareholders' Equity (Details 3) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 35	$ (5)	$ (291)	$ 229
Cumulative Effect of New Accounting Principle in Period of Adoption		(1)
OCI before reclassifications	331	(229)
Amounts reclassified from AOCI	(5)	(4)
Total other comprehensive income (loss), net of tax	326	$ (233)
Noncredit related impairments on securities and net unrealized securities gains (losses) on previously impaired securities	(4)
Stock repurchase program, authorized amount	2,500
Remaining balance under stock repurchase program	$ 154
Number of shares reacquired through surrender of restricted shares	0.3	0.2
Value of shares reacquired through surrender of restricted shares	$ 29	$ 39
Number of shares reacquired through net settlement options	0.1	0.4
Aggregate value of shares reacquired through net settlement options	$ 15	$ 56
Treasury shares reissued for restricted stock award grants and Ameriprise Financial Franchise Advisor Deferred Compensation Plan	0.7	0.8
Open market share repurchases [Member]
Repurchase of common shares (in shares)	2.8	2.4
Repurchase of common shares	$ 355	$ 387