SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Balance Sheet - Parenthetical) (Details 2) - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accumulated depreciation	$ 1,900	$ 1,800
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, shares authorized	1,250,000,000	1,250,000,000
Common shares, shares issued	327,506,935	324,006,315
Treasury shares	180,872,271	169,246,411
Ameriprise Financial, Inc:
Accumulated depreciation	$ 1,111	$ 1,055
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, shares authorized	1,250,000,000	1,250,000,000
Common shares, shares issued	327,506,935	324,006,315
Treasury shares	180,872,271	169,246,411