Basis of Presentation (Details)	Sep. 30, 2020 item
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of wholly owned subsidiaries	1

Represents the number of wholly owned subsidiaries of the entity.

No definition available.

Name:	amp_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix:	amp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant