Investments - Rollforward of Allowance for Credit Losses (Details) - Ameriprise Financial - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	$ 22	$ 1
Additional increases (decreases) on securities that had an allowance recorded in a previous period	3
Charge-offs	0	0
Ending Balance	25	1
Corporate debt securities
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	20	0
Additional increases (decreases) on securities that had an allowance recorded in a previous period	3
Charge-offs	0	0
Ending Balance	23	0
Asset backed securities
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	0
Ending Balance	0
State and municipal obligations
Rollforward of available-for-Sale securities allowance for credit losses
Beginning Balance	2	1
Additional increases (decreases) on securities that had an allowance recorded in a previous period	0
Charge-offs	0	0
Ending Balance	$ 2	$ 1

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with previously recorded allowance and not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 9
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

+ Details

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from writeoff.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 9
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

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