Investments (EITF info-Number of securities and unrealized losses) (Details) - Ameriprise Financial [Member] $ in Millions	Dec. 31, 2019 USD ($) Positions	Dec. 31, 2018 USD ($) Positions
Number of securities
Less than 12 months | Positions	255	727
12 months or more | Positions	202	584
Total | Positions	457	1,311
Unrealized losses
Less than 12 months | $	$ 17	$ 214
12 months or more | $	20	243
Total | $	$ 37	$ 457
Corporate debt securities [Member]
Number of securities
Less than 12 months | Positions	13	345
12 months or more | Positions	23	148
Total | Positions	36	493
Unrealized losses
Less than 12 months | $	$ 1	$ 152
12 months or more | $	3	78
Total | $	$ 4	$ 230
Residential mortgage backed securities [Member]
Number of securities
Less than 12 months | Positions	150	142
12 months or more | Positions	118	175
Total | Positions	268	317
Unrealized losses
Less than 12 months | $	$ 10	$ 18
12 months or more | $	9	60
Total | $	$ 19	$ 78
Commercial mortgage backed securities [Member]
Number of securities
Less than 12 months | Positions	52	104
12 months or more | Positions	31	112
Total | Positions	83	216
Unrealized losses
Less than 12 months | $	$ 3	$ 30
12 months or more | $	3	86
Total | $	$ 6	$ 116
Asset backed securities [Member]
Number of securities
Less than 12 months | Positions	34	38
12 months or more | Positions	16	35
Total | Positions	50	73
Unrealized losses
Less than 12 months | $	$ 3	$ 6
12 months or more | $	1	5
Total | $	$ 4	$ 11
State and municipal obligations [Member]
Number of securities
Less than 12 months | Positions	5	81
12 months or more | Positions	4	100
Total | Positions	9	181
Unrealized losses
Less than 12 months | $	$ 0	$ 4
12 months or more | $	2	9
Total | $	$ 2	$ 13
Foreign government bonds and obligations [Member]
Number of securities
Less than 12 months | Positions	1	17
12 months or more | Positions	10	14
Total | Positions	11	31
Unrealized losses
Less than 12 months | $	$ 0	$ 4
12 months or more | $	2	5
Total | $	$ 2	$ 9