Regulatory Requirements (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2017 USD ($) subsidiary	Dec. 31, 2016 USD ($)
Regulatory Requirements
Aggregate amount of unrestricted net assets	$ 900
Permitted practice impact to statutory surplus	$ 3
Number of broker-dealer subsidiaries \| subsidiary	5
Ameriprise Certificate Company [Member]
Regulatory Requirements
Requirement of qualified assets under Investment Company Act of 1940	$ 6,400	$ 5,900
Actual amount of qualified assets	6,900	6,300
RiverSource Life [Member]
Regulatory Requirements
Statutory unassigned surplus (deficit)	$ (306)	275
Percentage of previous year-end statutory capital and surplus (as a percent)	10.00%
Statutory capital and surplus	$ 2,400	3,000
Government debt securities on deposit with states under legal requirements	4	4
IDS Property Casualty [Member]
Regulatory Requirements
Statutory capital and surplus	781	$ 800
Ameriprise Certificate Company [Member] \| Ameriprise Financial, Inc
Regulatory Requirements
Maximum commitment under Capital Support Agreement	$ 50

Represents the actual amount of qualified assets held by an investment company subsidiary of the entity.

No definition available.

Name:	amp_ActualQualifiedAssetsHeld
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the aggregate amount of unrestricted net assets.

+ References

No definition available.

+ Details

Name:	amp_AggregateUnrestrictedNetAssets
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of maximum commitment under Capital Support Agreement.

+ References

No definition available.

+ Details

Name:	amp_MaximumCommitmentUnderCapitalSupportAgreement
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of broker-dealer subsidiaries of the entity.

+ References

No definition available.

+ Details

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

- Definition

Represents the percentage of previous year-end statutory capital and surplus that dividends must exceed in the determination of extraordinary dividends.

+ References

No definition available.

+ Details

Name:	amp_PercentageOfStatutoryCapitalAndSurplus
Namespace Prefix:	amp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	amp_RegulatoryRequirementsLineItems
Namespace Prefix:	amp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum amount of qualified assets required to be held by an investment company subsidiary of the entity under the Investment Company Act.

+ References

No definition available.

+ Details

Name:	amp_RequiredQualifiedAssetsAmount
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of statutory unassigned surplus as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	amp_StatutoryAccountingPracticesStatutoryUnassignedSurplus
Namespace Prefix:	amp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 320
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=75027294&loc=d3e22002-158495

+ Details

Name:	us-gaap_AssetsHeldByInsuranceRegulators
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of each item listed to reconcile the differences as of the balance sheet date resulting from applying state permitted statutory accounting practices rather than statutory accounting practices permitted by National Association of Insurance Commissioners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24746-158529

+ Details

Name:	us-gaap_StatutoryAccountingPracticesPermittedPracticeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529

+ Details

Name:	us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=amp_InvestmentCompanySubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=amp_RiverSourceLifeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=amp_IDSPropertyCasualtyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=amp_InvestmentCompanySubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidatedEntitiesAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: