Investments (Holdings info) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Investments	$ 35,935	$ 35,834
Available-for-sale securities [Member]
Investments	30,647	30,719
Mortgage loans, net [Member]
Investments	2,993	2,986
Policy and certificate loans [Member]
Investments	836	831
Other investments [Member]
Investments	$ 1,459	$ 1,298