Fair Values of Assets and Liabilities (Details)	6 Months Ended
Jun. 30, 2011
Fair Values of Assets and Liabilities
Maximum original maturities of highly liquid investments included in cash equivalents (in days)	90

Name:

amp_FairValuesOfAssetsAndLiabilitiesDisclosureAbstract

Namespace Prefix:

amp

Data Type:

xbrli:stringItemType

Balance Type:

na

Period Type:

duration