Investments - Available-for-Sale Securities by Type (Details) - Ameriprise Financial - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Investments
Amortized Cost	$ 55,437	$ 53,926
Gross Unrealized Gains	473	353
Gross Unrealized Losses	(1,755)	(2,121)
Allowance for Credit Losses	(5)	(5)	$ (2)	$ (2)
Fair Value	54,150	52,153
Accrued interest excluded from amortized cost basis	342	326
Corporate debt securities
Investments
Amortized Cost	15,055	14,509
Gross Unrealized Gains	270	201
Gross Unrealized Losses	(603)	(711)
Allowance for Credit Losses	0	0	(1)	(1)
Fair Value	14,722	13,999
Residential mortgage backed securities
Investments
Amortized Cost	27,338	24,396
Gross Unrealized Gains	139	81
Gross Unrealized Losses	(925)	(1,133)
Allowance for Credit Losses	0	0
Fair Value	26,552	23,344
Commercial mortgage backed securities
Investments
Amortized Cost	4,636	5,339
Gross Unrealized Gains	9	10
Gross Unrealized Losses	(177)	(219)
Allowance for Credit Losses	(4)	(4)	0	0
Fair Value	4,464	5,126
Asset backed securities
Investments
Amortized Cost	5,398	6,451
Gross Unrealized Gains	19	30
Gross Unrealized Losses	(33)	(39)
Allowance for Credit Losses	0	0
Fair Value	5,384	6,442
State and municipal obligations
Investments
Amortized Cost	585	629
Gross Unrealized Gains	36	29
Gross Unrealized Losses	(17)	(19)
Allowance for Credit Losses	(1)	(1)	$ (1)	$ (1)
Fair Value	603	638
U.S. government and agency obligations
Investments
Amortized Cost	2,412	2,589
Gross Unrealized Gains	0	2
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	2,412	2,591
Foreign government bonds and obligations
Investments
Amortized Cost	13	13
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	$ 13	$ 13

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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