Regulatory Requirements (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($) subsidiary	Dec. 31, 2017 USD ($)
Regulatory Requirements
Aggregate amount of unrestricted net assets	$ 1,600
Number of broker-dealer subsidiaries \| subsidiary	4
Ameriprise Certificate Company [Member]
Regulatory Requirements
Requirement of qualified assets under Investment Company Act of 1940	$ 7,900	$ 6,400
Actual amount of qualified assets	8,400	6,900
Ameriprise Certificate Company [Member] \| Ameriprise Financial, Inc
Regulatory Requirements
Maximum commitment under Capital Support Agreement	50
RiverSource Life [Member]
Regulatory Requirements
Permitted practice impact to statutory surplus	92	(3)
Statutory unassigned surplus (deficit)	$ 642	(306)
Percentage of previous year-end statutory capital and surplus	10.00%
Statutory capital and surplus	$ 3,300	2,400
Government debt securities on deposit with states as required by law	4	4
IDS Property Casualty [Member]
Regulatory Requirements
Statutory capital and surplus	789	$ 781
IDS Property Casualty [Member] \| Ameriprise Financial, Inc
Regulatory Requirements
Maximum commitment under Capital Support Agreement	$ 150

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

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Represents the aggregate amount of unrestricted net assets.

+ References

No definition available.

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Represents the amount of maximum commitment under Capital Support Agreement.

+ References

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

+ References

No definition available.

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- 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.

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- 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.

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- 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.

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- Definition

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

+ References

No definition available.

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- 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 825
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=75763970&loc=SL75763979-209797

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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://fasb.org/us-gaap/role/ref/legacyRef
-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

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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