Commitments, Guarantees and Contingencies Future Funding Commitments (Details 2) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commercial mortgage loans	$ 31	$ 78
Consumer mortgage loans	0	185
Consumer lines of credit	2	2
Affordable housing partnerships	123	177
Total funding commitments	$ 156	$ 442

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

No definition available.

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

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 future consumer mortgage loan commitments of the entity.

No definition available.

Name:	amp_ConsumerMortgageLoanFundingCommitments
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.

No definition available.

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration