Investments Investments (EITF info-Fair value) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value [Line Items]
Less than 12 months	$ 13,096	$ 6,637
12 months or more	1,151	1,936
Total	14,247	8,573
Corporate debt securities [Member]
Fair Value [Line Items]
Less than 12 months	2,844	66
12 months or more	37	173
Total	2,881	239
Residential mortgage backed securities [Member]
Fair Value [Line Items]
Less than 12 months	6,020	4,328
12 months or more	728	1,164
Total	6,748	5,492
Commercial mortgage backed securities [Member]
Fair Value [Line Items]
Less than 12 months	2,636	1,622
12 months or more	206	314
Total	2,842	1,936
Asset backed securities [Member]
Fair Value [Line Items]
Less than 12 months	1,424	598
12 months or more	163	213
Total	1,587	811
State and municipal obligations [Member]
Fair Value [Line Items]
Less than 12 months	79	23
12 months or more	7	57
Total	86	80
Foreign government bonds and obligations [Member]
Fair Value [Line Items]
Less than 12 months	93	0
12 months or more	10	15
Total	$ 103	$ 15