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Investments - Available-for-Sale Securities by Type (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments
Accrued interest excluded from amortized cost basis, location	Receivables	Receivables
Ameriprise Financial
Investments
Amortized Cost	$ 53,926	$ 53,048
Gross Unrealized Gains	353	615
Gross Unrealized Losses	(2,121)	(2,099)
Allowance for Credit Loss	(5)	(2)	$ (22)	$ (1)
Fair Value	52,153	51,562
Accrued interest excluded from amortized cost basis	326	319
Ameriprise Financial \| Corporate debt securities
Investments
Amortized Cost	14,509	12,675
Gross Unrealized Gains	201	409
Gross Unrealized Losses	(711)	(507)
Allowance for Credit Loss	0	(1)	(20)	0
Fair Value	13,999	12,576
Ameriprise Financial \| Residential mortgage backed securities
Investments
Amortized Cost	24,396	22,130
Gross Unrealized Gains	81	107
Gross Unrealized Losses	(1,133)	(1,171)
Allowance for Credit Loss	0	0
Fair Value	23,344	21,066
Ameriprise Financial \| Commercial mortgage backed securities
Investments
Amortized Cost	5,339	6,380
Gross Unrealized Gains	10	11
Gross Unrealized Losses	(219)	(341)
Allowance for Credit Loss	(4)	0	0	0
Fair Value	5,126	6,050
Ameriprise Financial \| Asset backed securities
Investments
Amortized Cost	6,451	8,353
Gross Unrealized Gains	30	25
Gross Unrealized Losses	(39)	(59)
Allowance for Credit Loss	0	0
Fair Value	6,442	8,319
Ameriprise Financial \| State and municipal obligations
Investments
Amortized Cost	629	719
Gross Unrealized Gains	29	62
Gross Unrealized Losses	(19)	(20)
Allowance for Credit Loss	(1)	(1)	$ (2)	$ (1)
Fair Value	638	760
Ameriprise Financial \| U.S. government and agency obligations
Investments
Amortized Cost	2,589	2,739
Gross Unrealized Gains	2	1
Gross Unrealized Losses	0	0
Allowance for Credit Loss	0	0
Fair Value	2,591	2,740
Ameriprise Financial \| Foreign government bonds and obligations
Investments
Amortized Cost	13	19
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(1)
Allowance for Credit Loss	0	0
Fair Value	$ 13	18
Ameriprise Financial \| Other securities
Investments
Amortized Cost		33
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Allowance for Credit Loss		0
Fair Value		$ 33