Investments - Rollforward of Allowance for Credit Losses (Details) - Ameriprise Financial - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	$ 22	$ 1	$ 11
Additions for which credit losses were not previously recorded	1	20	1
Charge-offs			(11)
Additional increases (decreases) on securities that had an allowance recorded in a previous period		1
Reductions for securities sold during the period (realized)	(21)
Ending Balance	2	22	1
Corporate debt securities
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	20	0	10
Additions for which credit losses were not previously recorded	1	20	0
Charge-offs			(10)
Additional increases (decreases) on securities that had an allowance recorded in a previous period		0
Reductions for securities sold during the period (realized)	(20)
Ending Balance	1	20	0
Asset backed securities
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	0	0	1
Additions for which credit losses were not previously recorded	0	0	0
Charge-offs			(1)
Additional increases (decreases) on securities that had an allowance recorded in a previous period		0
Reductions for securities sold during the period (realized)	0
Ending Balance	0	0	0
State and municipal obligations
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	2	1	0
Additions for which credit losses were not previously recorded	0	0	1
Charge-offs			0
Additional increases (decreases) on securities that had an allowance recorded in a previous period		1
Reductions for securities sold during the period (realized)	(1)
Ending Balance	$ 1	$ 2	$ 1