Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details) - Ameriprise Financial $ in Millions	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Number of securities
Less than 12 months | security	675	1,512
12 months or more | security	1,601	512
Total | security	2,276	2,024
Fair Value
Less than 12 months	$ 16,237	$ 24,196
12 months or more	23,146	8,491
Total	39,383	32,687
Unrealized Losses
Less than 12 months	(430)	(1,360)
12 months or more	(2,980)	(1,480)
Total	$ (3,410)	$ (2,840)
Available-for-Sale Securities with gross unrealized losses considered investment grade (as a percent)	96.00%	95.00%
Corporate debt securities
Number of securities
Less than 12 months | security	293	457
12 months or more | security	396	108
Total | security	689	565
Fair Value
Less than 12 months	$ 4,854	$ 5,782
12 months or more	5,053	1,575
Total	9,907	7,357
Unrealized Losses
Less than 12 months	(204)	(458)
12 months or more	(819)	(365)
Total	$ (1,023)	$ (823)
Residential mortgage backed securities
Number of securities
Less than 12 months | security	230	589
12 months or more | security	738	244
Total | security	968	833
Fair Value
Less than 12 months	$ 7,386	$ 9,407
12 months or more	10,569	4,076
Total	17,955	13,483
Unrealized Losses
Less than 12 months	(193)	(577)
12 months or more	(1,617)	(813)
Total	$ (1,810)	$ (1,390)
Commercial mortgage backed securities
Number of securities
Less than 12 months | security	43	249
12 months or more | security	282	101
Total | security	325	350
Fair Value
Less than 12 months	$ 932	$ 3,857
12 months or more	4,099	1,802
Total	5,031	5,659
Unrealized Losses
Less than 12 months	(18)	(220)
12 months or more	(434)	(219)
Total	$ (452)	$ (439)
Asset backed securities
Number of securities
Less than 12 months | security	74	145
12 months or more | security	122	31
Total | security	196	176
Fair Value
Less than 12 months	$ 1,770	$ 4,413
12 months or more	3,273	977
Total	5,043	5,390
Unrealized Losses
Less than 12 months	(9)	(86)
12 months or more	(82)	(72)
Total	$ (91)	$ (158)
State and municipal obligations
Number of securities
Less than 12 months | security	12	48
12 months or more | security	59	27
Total | security	71	75
Fair Value
Less than 12 months	$ 77	$ 134
12 months or more	140	60
Total	217	194
Unrealized Losses
Less than 12 months	(3)	(16)
12 months or more	(26)	(11)
Total	$ (29)	$ (27)
U.S. government and agencies obligations
Number of securities
Less than 12 months | security	17	13
12 months or more | security	1	0
Total | security	18	13
Fair Value
Less than 12 months	$ 1,148	$ 566
12 months or more	0	0
Total	1,148	566
Unrealized Losses
Less than 12 months	(2)	(1)
12 months or more	0	0
Total	$ (2)	$ (1)
Foreign government bonds and obligations
Number of securities
Less than 12 months | security	1	11
12 months or more | security	3	1
Total | security	4	12
Fair Value
Less than 12 months	$ 5	$ 37
12 months or more	12	1
Total	17	38
Unrealized Losses
Less than 12 months	0	(2)
12 months or more	(2)	0
Total	$ (2)	$ (2)
Other securities
Number of securities
Less than 12 months | security	5
12 months or more | security	0
Total | security	5
Fair Value
Less than 12 months	$ 65
12 months or more	0
Total	65
Unrealized Losses
Less than 12 months	(1)
12 months or more	0
Total	$ (1)