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Commitments, Guarantees and Contingencies Future Funding Commitments (Details 2) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |  |
Commercial mortgage loans | $ 60 | $ 57
Affordable housing partnerships and other real estate partnerships | 22 | 59
Private funds | 12 | 0
Consumer lines of credit | 1 | 1
Total funding commitments | $ 95 | $ 117

X
- Definition The amount of the obligation related to Affordable Housing partnerships, which qualify for low income tax credits. + References No definition available. + Details
Name: | amp_AffordableHousingProgramObligationAmountQualifyingForLowIncomeTaxCredits
Namespace Prefix: | amp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of future commercial mortgage loan commitments of the entity. + References No definition available. + Details
Name: | amp_CommercialMortgageLoanFundingCommitments
Namespace Prefix: | amp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of future consumer lines of credit commitments of the entity. + References No definition available. + Details
Name: | amp_ConsumerLinesOfCreditFundingCommitments
Namespace Prefix: | amp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of entity's total funding commitments in future. + References No definition available. + Details
Name: | amp_FundingCommitments
Namespace Prefix: | amp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of future funding commitments for private funds. + References No definition available. + Details
Name: | amp_PrivateFundsFundingCommitments
Namespace Prefix: | amp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration