Investments - Rollforward of Allowance for Credit Losses (Details) - Ameriprise Financial - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	$ 11	$ 0	[1]
Additions for which credit losses were not previously recorded	1	14
Additional increases (decreases) on securities that had an allowance recorded in a previous period		(3)
Charge-offs	(11)
Ending Balance	1	11
Corporate debt securities
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	10	0	[1]
Additions for which credit losses were not previously recorded		13
Additional increases (decreases) on securities that had an allowance recorded in a previous period		(3)
Charge-offs	(10)
Ending Balance	0	10
Asset backed securities
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	1	0	[1]
Additions for which credit losses were not previously recorded		1
Charge-offs	(1)
Ending Balance	0	1
State and municipal obligations
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	0
Additions for which credit losses were not previously recorded	1
Ending Balance	$ 1	$ 0

[1] Prior to January 1, 2020, credit losses on Available-for-Sale securities were not recorded in an allowance but were recorded as a reduction of the book value of the security if the security was other-than-temporarily impaired.