Investments Continuous Unrealized Loss Position (Details) - Ameriprise Financial $ in Millions	Jun. 30, 2021 USD ($) Positions	Dec. 31, 2020 USD ($) Positions
Number of securities
Less than 12 months | Positions	182	153
12 months or more | Positions	96	122
Total | Positions	278	275
Fair Value
Less than 12 months	$ 3,776	$ 2,193
12 months or more	611	1,046
Total	4,387	3,239
Unrealized Losses
Less than 12 months	(39)	(17)
12 months or more	(4)	(17)
Total	$ (43)	$ (34)
Available -for-Sale Securities with gross unrealized losses considered investment grade (as a percent)	92.00%	92.00%
Corporate debt securities
Number of securities
Less than 12 months | Positions	67	26
12 months or more | Positions	1	11
Total | Positions	68	37
Fair Value
Less than 12 months	$ 1,272	$ 228
12 months or more	5	19
Total	1,277	247
Unrealized Losses
Less than 12 months	(27)	(1)
12 months or more		(1)
Total	$ (27)	$ (2)
Residential mortgage backed securities
Number of securities
Less than 12 months | Positions	55	72
12 months or more | Positions	65	71
Total | Positions	120	143
Fair Value
Less than 12 months	$ 1,531	$ 833
12 months or more	229	391
Total	1,760	1,224
Unrealized Losses
Less than 12 months	(8)	(2)
12 months or more	(1)	(2)
Total	$ (9)	$ (4)
Commercial mortgage backed securities
Number of securities
Less than 12 months | Positions	34	35
12 months or more | Positions	12	19
Total | Positions	46	54
Fair Value
Less than 12 months	$ 519	$ 781
12 months or more	211	393
Total	730	1,174
Unrealized Losses
Less than 12 months	(3)	(11)
12 months or more	(1)	(10)
Total	$ (4)	$ (21)
Asset backed securities
Number of securities
Less than 12 months | Positions	13	17
12 months or more | Positions	10	13
Total | Positions	23	30
Fair Value
Less than 12 months	$ 419	$ 344
12 months or more	153	231
Total	572	575
Unrealized Losses
Less than 12 months	(1)	(3)
12 months or more		(2)
Total	$ (1)	$ (5)
State and municipal obligations
Number of securities
Less than 12 months | Positions	10	2
12 months or more | Positions	2	1
Total | Positions	12	3
Fair Value
Less than 12 months	$ 32	$ 4
12 months or more	8	4
Total	40	8
Unrealized Losses
12 months or more	(1)	(1)
Total	$ (1)	$ (1)
Foreign government bonds and obligations
Number of securities
Less than 12 months | Positions	3	1
12 months or more | Positions	6	7
Total | Positions	9	8
Fair Value
Less than 12 months	$ 3	$ 3
12 months or more	5	8
Total	8	11
Unrealized Losses
12 months or more	(1)	(1)
Total	$ (1)	$ (1)