Investments - Available-for-Sale Securities by Type (Details) - Ameriprise Financial - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Investments
Amortized Cost	$ 51,443		$ 43,384
Gross Unrealized Gains	161		289
Gross Unrealized Losses	(3,410)		(2,840)
Allowance for Credit Losses	(1)	$ (9)	(22)	$ (22)	$ (1)	$ (1)
Fair Value	48,193		40,811
Accrued interest excluded from amortized cost basis	326		237
Corporate debt securities
Investments
Amortized Cost	12,206		10,361
Gross Unrealized Gains	104		180
Gross Unrealized Losses	(1,023)		(823)
Allowance for Credit Losses	0	(7)	(20)	(20)	0	0
Fair Value	11,287		9,698
Residential mortgage backed securities
Investments
Amortized Cost	21,090		17,056
Gross Unrealized Gains	9		37
Gross Unrealized Losses	(1,810)		(1,390)
Allowance for Credit Losses	0		0
Fair Value	19,289		15,703
Commercial mortgage backed securities
Investments
Amortized Cost	6,489		6,648
Gross Unrealized Gains	4		3
Gross Unrealized Losses	(452)		(439)
Allowance for Credit Losses	0		0
Fair Value	6,041		6,212
Asset backed securities
Investments
Amortized Cost	8,377		6,408
Gross Unrealized Gains	13		14
Gross Unrealized Losses	(91)		(158)
Allowance for Credit Losses	0		0
Fair Value	8,299		6,264
State and municipal obligations
Investments
Amortized Cost	728		773
Gross Unrealized Gains	31		53
Gross Unrealized Losses	(29)		(27)
Allowance for Credit Losses	(1)	$ (2)	(2)	$ (2)	$ (1)	$ (1)
Fair Value	729		797
U.S. government and agencies obligations
Investments
Amortized Cost	2,468		2,079
Gross Unrealized Gains	0		1
Gross Unrealized Losses	(2)		(1)
Allowance for Credit Losses	0		0
Fair Value	2,466		2,079
Foreign government bonds and obligations
Investments
Amortized Cost	19		43
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(2)		(2)
Allowance for Credit Losses	0		0
Fair Value	17		41
Other securities
Investments
Amortized Cost	66		16
Gross Unrealized Gains	0		1
Gross Unrealized Losses	(1)		0
Allowance for Credit Losses	0		0
Fair Value	$ 65		$ 17