Eaton Vance Floating-Rate & High Income Fund (EIFHX) N-CSRS23 Oct 24Certified semi-annual shareholder report (management investment company)Financial data

Company Profile

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
Form N-CSR Cover	Aug. 31, 2024
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	EATON VANCE MUTUAL FUNDS TRUST
Entity Central Index Key	0000745463
Entity Investment Company Type	N-1A
Document Period End Date	Aug. 31, 2024

Shareholder Report

Shareholder Report	6 Months Ended
Shareholder Report	Aug. 31, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	EATON VANCE MUTUAL FUNDS TRUST
Entity Central Index Key	0000745463
Entity Investment Company Type	N-1A
Document Period End Date	Aug. 31, 2024
C000138167
Shareholder Report [Line Items]
Fund Name	Parametric Dividend Income Fund
Class Name	Class I
Trading Symbol	EIPDX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about the Parametric Dividend Income Fund for the period of March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual	Semi-Annual Shareholder Report
Additional Information [Text Block]	You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php
Additional Information Phone Number	1-800-260-0761
Additional Information Website	www.eatonvance.com/parametric-fund-documents.php</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/parametric-fund-documents.php</span>
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $22 0.41%
Expenses Paid, Amount	$ 22
Expense Ratio, Percent	0.41%
AssetsNet	$ 27,730,672
Holdings Count \| Holding	192
InvestmentCompanyPortfolioTurnover	30%
Additional Fund Statistics [Text Block]	Key Fund Statistics Total Net Assets $27,730,672 # of Portfolio Holdings 192 Portfolio Turnover Rate 30%
Holdings [Text Block]	Sector Allocation (% of total investments) Value Value Short-Term Investments 0.3% Communication Services 5.2% Energy 9.7% Information Technology 9.9% Consumer Discretionary 10.3% Industrials 10.4% Materials 10.6% Financials 10.7% Health Care 10.9% Consumer Staples 11.0% Utilities 11.0%
Material Fund Change [Text Block]
Updated Prospectus Phone Number	1-800-260-0761
C000138166
Shareholder Report [Line Items]
Fund Name	Parametric Dividend Income Fund
Class Name	Class A
Trading Symbol	EAPDX
Annual or Semi-Annual Statement [Text Block]	This semi-annual shareholder report contains important information about the Parametric Dividend Income Fund for the period of March 1, 2024 to August 31, 2024.
Shareholder Report Annual or Semi-Annual	Semi-Annual Shareholder Report
Additional Information [Text Block]	You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php
Additional Information Phone Number	1-800-260-0761
Additional Information Website	www.eatonvance.com/parametric-fund-documents.php</span>" id="sjs-B39"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left;">www.eatonvance.com/parametric-fund-documents.php</span>
Expenses [Text Block]	What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $35 0.66%
Expenses Paid, Amount	$ 35
Expense Ratio, Percent	0.66%
AssetsNet	$ 27,730,672
Holdings Count \| Holding	192
InvestmentCompanyPortfolioTurnover	30%
Additional Fund Statistics [Text Block]	Key Fund Statistics Total Net Assets $27,730,672 # of Portfolio Holdings 192 Portfolio Turnover Rate 30%
Holdings [Text Block]	Sector Allocation (% of total investments) Value Value Short-Term Investments 0.3% Communication Services 5.2% Energy 9.7% Information Technology 9.9% Consumer Discretionary 10.3% Industrials 10.4% Materials 10.6% Financials 10.7% Health Care 10.9% Consumer Staples 11.0% Utilities 11.0%
Material Fund Change [Text Block]
Updated Prospectus Phone Number	1-800-260-0761

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Aug. 31, 2024
C000138167 \| FR_487836108
Holdings [Line Items]
Percent of Total Investments	0.70%
C000138167 \| FR_539830109
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_110122108
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_92939U106
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_001055102
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_G0250X107
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_75513E101
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_00287Y109
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_086516101
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| FR_457187102
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138167 \| SectorShort-Term Investments
Holdings [Line Items]
Percent of Net Asset Value	0.30%
C000138167 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000138167 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	9.70%
C000138167 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	9.90%
C000138167 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	10.30%
C000138167 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	10.40%
C000138167 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	10.60%
C000138167 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	10.70%
C000138167 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	10.90%
C000138167 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	11%
C000138167 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	11%
C000138166 \| FR_487836108
Holdings [Line Items]
Percent of Total Investments	0.70%
C000138166 \| FR_539830109
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_110122108
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_92939U106
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_001055102
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_G0250X107
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_75513E101
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_00287Y109
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_086516101
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| FR_457187102
Holdings [Line Items]
Percent of Total Investments	0.60%
C000138166 \| SectorShort-Term Investments
Holdings [Line Items]
Percent of Net Asset Value	0.30%
C000138166 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000138166 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	9.70%
C000138166 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	9.90%
C000138166 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	10.30%
C000138166 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	10.40%
C000138166 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	10.60%
C000138166 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	10.70%
C000138166 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	10.90%
C000138166 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	11%
C000138166 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	11%