Investments - Available-for-Sale Securities by Type (Details) - Ameriprise Financial - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Investments
Amortized Cost	$ 53,968	$ 53,048
Gross Unrealized Gains	465	615
Gross Unrealized Losses	(2,185)	(2,099)
Allowance for Credit Losses	(2)	(2)	$ (25)	$ (22)
Fair Value	52,246	51,562
Accrued interest excluded from amortized cost basis	330	319
Corporate debt securities
Investments
Amortized Cost	13,154	12,675
Gross Unrealized Gains	291	409
Gross Unrealized Losses	(590)	(507)
Allowance for Credit Losses	(1)	(1)	(23)	(20)
Fair Value	12,854	12,576
Residential mortgage backed securities
Investments
Amortized Cost	22,585	22,130
Gross Unrealized Gains	77	107
Gross Unrealized Losses	(1,220)	(1,171)
Allowance for Credit Losses	0	0
Fair Value	21,442	21,066
Commercial mortgage backed securities
Investments
Amortized Cost	6,312	6,380
Gross Unrealized Gains	14	11
Gross Unrealized Losses	(303)	(341)
Allowance for Credit Losses	0	0
Fair Value	6,023	6,050
Asset backed securities
Investments
Amortized Cost	8,177	8,353
Gross Unrealized Gains	31	25
Gross Unrealized Losses	(52)	(59)
Allowance for Credit Losses	0	0
Fair Value	8,156	8,319
State and municipal obligations
Investments
Amortized Cost	726	719
Gross Unrealized Gains	52	62
Gross Unrealized Losses	(19)	(20)
Allowance for Credit Losses	(1)	(1)	$ (2)	$ (2)
Fair Value	758	760
U.S. government and agencies obligations
Investments
Amortized Cost	2,982	2,739
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	2,982	2,740
Foreign government bonds and obligations
Investments
Amortized Cost	19	19
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	(1)
Allowance for Credit Losses	0	0
Fair Value	18	18
Other securities
Investments
Amortized Cost	13	33
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	$ 13	$ 33

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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