Investments (Holdings info) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Investments	$ 37,915	$ 35,825
Available-for-Sale securities, at fair value [Member]
Investments	33,129	31,058
Mortgage loans, net [Member]
Investments	2,778	2,696
Policy and certificate loans [Member]
Investments	868	861
Other investments [Member]
Investments	$ 1,140	$ 1,210