Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details) - Ameriprise Financial $ in Millions	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Number of securities
Less than 12 months | security	363	275
12 months or more | security	1,527	1,556
Total | security	1,890	1,831
Fair Value
Less than 12 months	$ 8,553	$ 6,944
12 months or more	21,472	22,956
Total	30,025	29,900
Unrealized Losses
Less than 12 months	(58)	(48)
12 months or more	(2,127)	(2,051)
Total	$ (2,185)	$ (2,099)
Available-for-Sale Securities with gross unrealized losses considered investment grade (as a percent)	97.00%	96.00%
Corporate debt securities
Number of securities
Less than 12 months | security	176	97
12 months or more | security	367	376
Total | security	543	473
Fair Value
Less than 12 months	$ 2,371	$ 1,276
12 months or more	5,179	5,197
Total	7,550	6,473
Unrealized Losses
Less than 12 months	(25)	(11)
12 months or more	(565)	(496)
Total	$ (590)	$ (507)
Residential mortgage backed securities
Number of securities
Less than 12 months | security	110	82
12 months or more | security	742	734
Total | security	852	816
Fair Value
Less than 12 months	$ 3,747	$ 3,052
12 months or more	10,772	10,677
Total	14,519	13,729
Unrealized Losses
Less than 12 months	(31)	(25)
12 months or more	(1,189)	(1,146)
Total	$ (1,220)	$ (1,171)
Commercial mortgage backed securities
Number of securities
Less than 12 months | security	10	31
12 months or more | security	283	277
Total | security	293	308
Fair Value
Less than 12 months	$ 163	$ 747
12 months or more	4,370	4,092
Total	4,533	4,839
Unrealized Losses
Less than 12 months	0	(9)
12 months or more	(303)	(332)
Total	$ (303)	$ (341)
Asset backed securities
Number of securities
Less than 12 months | security	44	49
12 months or more | security	80	116
Total | security	124	165
Fair Value
Less than 12 months	$ 919	$ 885
12 months or more	987	2,840
Total	1,906	3,725
Unrealized Losses
Less than 12 months	(2)	(2)
12 months or more	(50)	(57)
Total	$ (52)	$ (59)
State and municipal obligations
Number of securities
Less than 12 months | security	6	5
12 months or more | security	51	49
Total | security	57	54
Fair Value
Less than 12 months	$ 17	$ 29
12 months or more	152	138
Total	169	167
Unrealized Losses
Less than 12 months	0	(1)
12 months or more	(19)	(19)
Total	$ (19)	$ (20)
U.S. government and agencies obligations
Number of securities
Less than 12 months | security	14	11
12 months or more | security	1	1
Total | security	15	12
Fair Value
Less than 12 months	$ 1,318	$ 955
12 months or more	0	0
Total	1,318	955
Unrealized Losses
Less than 12 months	0	0
12 months or more	0	0
Total	$ 0	$ 0
Foreign government bonds and obligations
Number of securities
Less than 12 months | security	2	0
12 months or more | security	3	3
Total | security	5	3
Fair Value
Less than 12 months	$ 5	$ 0
12 months or more	12	12
Total	17	12
Unrealized Losses
Less than 12 months	0	0
12 months or more	(1)	(1)
Total	$ (1)	$ (1)
Other securities
Number of securities
Less than 12 months | security	1
12 months or more | security	0
Total | security	1
Fair Value
Less than 12 months	$ 13
12 months or more	0
Total	13
Unrealized Losses
Less than 12 months	0
12 months or more	0
Total	$ 0