Document and Entity Information	Total
Risk/Return:
Document Type	497
Document Period End Date	Dec. 31, 2015
Registrant Name	EATON VANCE MUTUAL FUNDS TRUST
Central Index Key	0000745463
Amendment Flag	false
Document Creation Date	Nov. 01, 2016
Document Effective Date	Nov. 01, 2016
Prospectus Date	May 01, 2016
PARAMETRIC COMMODITY STRATEGY FUND \| Investor Class
Risk/Return:
Trading Symbol	EAPCX
PARAMETRIC COMMODITY STRATEGY FUND \| Institutional Class
Risk/Return:
Trading Symbol	EIPCX

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The date the document was made available and submitted, in CCYY-MM-DD format. The date of submission, date of acceptance by the recipient, and the document effective date are all potentially different.

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The date when a document, upon receipt and acceptance, becomes officially effective, in CCYY-MM-DD format. Usually it is a system-assigned date time value, but it may be declared by the submitter in some cases.

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The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation 12B
-Number 240
-Section 12b
-Subsection 1

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