This semi-annual shareholder report contains important information about the Parametric Emerging Markets Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

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Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$72	1.44%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 72

Expense Ratio, Percent

1.44%

^[1]

AssetsNet

$ 211,437,508

Holdings Count | Holding

1,210

InvestmentCompanyPortfolioTurnover

6.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$211,437,508
# of Portfolio Holdings	1,210
Portfolio Turnover Rate	6%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
Developed Europe	0.6%
North America	1.5%
Africa	7.9%
Middle East	10.7%
Emerging Europe	12.6%
Latin America	15.5%
Asia	51.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000034230

Shareholder Report [Line Items]

Fund Name

Parametric Emerging Markets Fund

Class Name

Class C

Trading Symbol

ECEMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric Emerging Markets Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$109	2.19%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 109

Expense Ratio, Percent

2.19%

^[2]

AssetsNet

$ 211,437,508

Holdings Count | Holding

1,210

InvestmentCompanyPortfolioTurnover

6.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$211,437,508
# of Portfolio Holdings	1,210
Portfolio Turnover Rate	6%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
Developed Europe	0.6%
North America	1.5%
Africa	7.9%
Middle East	10.7%
Emerging Europe	12.6%
Latin America	15.5%
Asia	51.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000034231

Shareholder Report [Line Items]

Fund Name

Parametric Emerging Markets Fund

Class Name

Class I

Trading Symbol

EIEMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric Emerging Markets Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$60	1.19%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 60

Expense Ratio, Percent

1.19%

^[3]

AssetsNet

$ 211,437,508

Holdings Count | Holding

1,210

InvestmentCompanyPortfolioTurnover

6.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$211,437,508
# of Portfolio Holdings	1,210
Portfolio Turnover Rate	6%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
Developed Europe	0.6%
North America	1.5%
Africa	7.9%
Middle East	10.7%
Emerging Europe	12.6%
Latin America	15.5%
Asia	51.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000142449

Shareholder Report [Line Items]

Fund Name

Parametric Emerging Markets Fund

Class Name

Class R6

Trading Symbol

EREMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric Emerging Markets Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$56	1.12%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.12%

^[4]

AssetsNet

$ 211,437,508

Holdings Count | Holding

1,210

InvestmentCompanyPortfolioTurnover

6.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$211,437,508
# of Portfolio Holdings	1,210
Portfolio Turnover Rate	6%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
Developed Europe	0.6%
North America	1.5%
Africa	7.9%
Middle East	10.7%
Emerging Europe	12.6%
Latin America	15.5%
Asia	51.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000086647

Shareholder Report [Line Items]

Fund Name

Parametric International Equity Fund

Class Name

Class A

Trading Symbol

EAISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric International Equity Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$39	0.77%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.77%

^[5]

AssetsNet

$ 209,609,178

Holdings Count | Holding

1,018

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$209,609,178
# of Portfolio Holdings	1,018
Portfolio Turnover Rate	30%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
North America	1.7%
Developed Middle East	2.1%
Australasia/Pacific	9.5%
Asia	21.1%
Developed Europe	65.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000161753

Shareholder Report [Line Items]

Fund Name

Parametric International Equity Fund

Class Name

Class R

Trading Symbol

ERISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric International Equity Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R	$52	1.02%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

1.02%

^[6]

AssetsNet

$ 209,609,178

Holdings Count | Holding

1,018

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$209,609,178
# of Portfolio Holdings	1,018
Portfolio Turnover Rate	30%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
North America	1.7%
Developed Middle East	2.1%
Australasia/Pacific	9.5%
Asia	21.1%
Developed Europe	65.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000161754

Shareholder Report [Line Items]

Fund Name

Parametric International Equity Fund

Class Name

Class R6

Trading Symbol

ESISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric International Equity Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$25	0.49%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 25

Expense Ratio, Percent

0.49%

^[7]

AssetsNet

$ 209,609,178

Holdings Count | Holding

1,018

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$209,609,178
# of Portfolio Holdings	1,018
Portfolio Turnover Rate	30%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
North America	1.7%
Developed Middle East	2.1%
Australasia/Pacific	9.5%
Asia	21.1%
Developed Europe	65.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000086649

Shareholder Report [Line Items]

Fund Name

Parametric International Equity Fund

Class Name

Class I

Trading Symbol

EIISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric International Equity Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$26	0.52%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 26

Expense Ratio, Percent

0.52%

^[8]

AssetsNet

$ 209,609,178

Holdings Count | Holding

1,018

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$209,609,178
# of Portfolio Holdings	1,018
Portfolio Turnover Rate	30%

Holdings [Text Block]

Geographic Allocation (% of total investments)

Table Summary
Value	Value
North America	1.7%
Developed Middle East	2.1%
Australasia/Pacific	9.5%
Asia	21.1%
Developed Europe	65.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Updated Prospectus Phone Number

1-800-260-0761

C000177028

Shareholder Report [Line Items]

Fund Name

Parametric Volatility Risk Premium - Defensive Fund

Class Name

Class I

Trading Symbol

EIVPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Parametric Volatility Risk Premium - Defensive Fund for the period of February 1, 2026 to July 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/parametric-fund-documents.php. You can also request this information by contacting us at 1-800-260-0761.

Additional Information Phone Number

1-800-260-0761

Additional Information Website

Expenses [Text Block]