CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
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	331,142,264	329,842,827
Treasury shares	208,807,377	205,903,593
Ameriprise Financial [Member]
Investments, Allowance for Credit Losses	$ 52	$ 24	[1]
Accounts Receivable, Allowance for Credit Loss	$ 47	$ 39

[1] Prior to January 1, 2020, the allowance for credit losses is not applicable to Available-for-Sale securities. See Notes 2, 3, 6 and 7 for more information.