Commitments, Guarantees and Contingencies Future Funding Commitments (Details 2) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commercial mortgage loans	$ 18	$ 60
Affordable housing partnerships and other real estate partnerships	12	22
Property Funds Funding Commitments	17	12
Private funds	9	12
Pledged Asset Lines of Credit	342	0
Consumer lines of credit	1	1
Total funding commitments	$ 399	$ 107

The amount of the obligation related to Affordable Housing partnerships, which qualify for low income tax credits.

No definition available.

Name:	amp_AffordableHousingProgramObligationAmountQualifyingForLowIncomeTaxCredits
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Balance Type:	credit
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Represents the amount of future commercial mortgage loan commitments of the entity.

No definition available.

Name:	amp_CommercialMortgageLoanFundingCommitments
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of future consumer lines of credit commitments of the entity.

No definition available.

Name:	amp_ConsumerLinesOfCreditFundingCommitments
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of entity's total funding commitments in future.

No definition available.

Pledged Asset Lines of Credit

No definition available.

Name:	amp_PledgedAssetLinesOfCredit
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of future funding commitments for private funds.

No definition available.

Name:	amp_PrivateFundsFundingCommitments
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Property Funds Funding Commitments

No definition available.

Name:	amp_PropertyFundsFundingCommitments
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

No definition available.

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
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Balance Type:	na
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