Investments Investments (EITF info-Fair value) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value [Line Items]
Less than 12 months	$ 6,637	$ 10,445
12 months or more	1,936	6,322
Total	8,573	16,767
Corporate debt securities [Member]
Fair Value [Line Items]
Less than 12 months	66	5,522
12 months or more	173	1,717
Total	239	7,239
Residential mortgage backed securities [Member]
Fair Value [Line Items]
Less than 12 months	4,328	2,029
12 months or more	1,164	2,132
Total	5,492	4,161
Commercial mortgage backed securities [Member]
Fair Value [Line Items]
Less than 12 months	1,622	2,062
12 months or more	314	1,806
Total	1,936	3,868
Asset backed securities [Member]
Fair Value [Line Items]
Less than 12 months	598	491
12 months or more	213	396
Total	811	887
State and municipal obligations [Member]
Fair Value [Line Items]
Less than 12 months	23	255
12 months or more	57	254
Total	80	509
Foreign government bonds and obligations [Member]
Fair Value [Line Items]
Less than 12 months	0	86
12 months or more	15	17
Total	$ 15	$ 103