This semi-annual shareholder report contains important information about the Eaton Vance China Equity Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

Additional Information Website

<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; text-align-last: auto; white-space-collapse: preserve-breaks;">www.eatonvance.com/open-end-mutual-fund-documents.php</span>

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	$74	1.50%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 74

Expense Ratio, Percent

1.50%

^[1]

AssetsNet

$ 37,486,306

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$37,486,306
# of Portfolio Holdings	69
Portfolio Turnover Rate	25%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Utilities	1.0%
Real Estate	1.4%
Short-Term Investments	2.5%
Consumer Staples	2.8%
Health Care	3.0%
Energy	4.1%
Materials	5.5%
Industrials	8.9%
Information Technology	9.4%
Financials	19.1%
Communication Services	20.2%
Consumer Discretionary	22.1%

Largest Holdings [Text Block]

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

Table Summary
Tencent Holdings Ltd.	18.8%
Alibaba Group Holding Ltd.	14.4%
China Construction Bank Corp., Class H	7.5%
Zijin Mining Group Co. Ltd., Class H	4.0%
Ping An Insurance Group Co. of China Ltd., Class H	3.2%
Industrial & Commercial Bank of China Ltd., Class H	2.8%
NAURA Technology Group Co. Ltd., Class A	2.7%
Wuxi Biologics Cayman, Inc.	2.4%
China Shenhua Energy Co. Ltd., Class H	2.1%
PetroChina Co. Ltd., Class H	2.0%
Total	59.9%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000014187

Shareholder Report [Line Items]

Fund Name

Eaton Vance China Equity Fund

Class Name

Class C

Trading Symbol

ECCGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance China Equity Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$110	2.25%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 110

Expense Ratio, Percent

2.25%

^[2]

AssetsNet

$ 37,486,306

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$37,486,306
# of Portfolio Holdings	69
Portfolio Turnover Rate	25%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Utilities	1.0%
Real Estate	1.4%
Short-Term Investments	2.5%
Consumer Staples	2.8%
Health Care	3.0%
Energy	4.1%
Materials	5.5%
Industrials	8.9%
Information Technology	9.4%
Financials	19.1%
Communication Services	20.2%
Consumer Discretionary	22.1%

Largest Holdings [Text Block]

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

Table Summary
Tencent Holdings Ltd.	18.8%
Alibaba Group Holding Ltd.	14.4%
China Construction Bank Corp., Class H	7.5%
Zijin Mining Group Co. Ltd., Class H	4.0%
Ping An Insurance Group Co. of China Ltd., Class H	3.2%
Industrial & Commercial Bank of China Ltd., Class H	2.8%
NAURA Technology Group Co. Ltd., Class A	2.7%
Wuxi Biologics Cayman, Inc.	2.4%
China Shenhua Energy Co. Ltd., Class H	2.1%
PetroChina Co. Ltd., Class H	2.0%
Total	59.9%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000014184

Shareholder Report [Line Items]

Fund Name

Eaton Vance China Equity Fund

Class Name

Class I

Trading Symbol

EICGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance China Equity Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$61	1.25%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.25%

^[3]

AssetsNet

$ 37,486,306

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$37,486,306
# of Portfolio Holdings	69
Portfolio Turnover Rate	25%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Utilities	1.0%
Real Estate	1.4%
Short-Term Investments	2.5%
Consumer Staples	2.8%
Health Care	3.0%
Energy	4.1%
Materials	5.5%
Industrials	8.9%
Information Technology	9.4%
Financials	19.1%
Communication Services	20.2%
Consumer Discretionary	22.1%

Largest Holdings [Text Block]

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

Table Summary
Tencent Holdings Ltd.	18.8%
Alibaba Group Holding Ltd.	14.4%
China Construction Bank Corp., Class H	7.5%
Zijin Mining Group Co. Ltd., Class H	4.0%
Ping An Insurance Group Co. of China Ltd., Class H	3.2%
Industrial & Commercial Bank of China Ltd., Class H	2.8%
NAURA Technology Group Co. Ltd., Class A	2.7%
Wuxi Biologics Cayman, Inc.	2.4%
China Shenhua Energy Co. Ltd., Class H	2.1%
PetroChina Co. Ltd., Class H	2.0%
Total	59.9%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000104752

Shareholder Report [Line Items]

Fund Name

Eaton Vance All Asset Strategy Fund

Class Name

Class A

Trading Symbol

EARAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance All Asset Strategy Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$52	1.01%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

1.01%

^[4]

AssetsNet

$ 234,161,720

Holdings Count | Holding

255

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$234,161,720
# of Portfolio Holdings	255
Portfolio Turnover Rate	50%

Holdings [Text Block]

Asset Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	3.0%
Sovereign Government Bonds	3.1%
Exchange-Traded Funds	38.8%
Common Stocks	55.1%

Largest Holdings [Text Block]

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

Table Summary
Eaton Vance Mortgage Opportunities ETF	11.0%
Eaton Vance Total Return Bond ETF	10.8%
iShares Core MSCI Emerging Markets ETF	4.2%
Vanguard Emerging Markets Government Bond ETF	4.1%
iShares TIPS Bond ETF	3.5%
Vanguard Short-Term Treasury ETF	3.2%
Brazil Letras do Tesouro Nacional, 0.00%, 1/1/29	3.1%
NVIDIA Corp.	2.5%
Apple, Inc.	2.3%
Microsoft Corp.	1.8%
Total	46.5%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000104753

Shareholder Report [Line Items]

Fund Name

Eaton Vance All Asset Strategy Fund

Class Name

Class C

Trading Symbol

ECRAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance All Asset Strategy Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$91	1.76%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 91

Expense Ratio, Percent

1.76%

^[5]

AssetsNet

$ 234,161,720

Holdings Count | Holding

255

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$234,161,720
# of Portfolio Holdings	255
Portfolio Turnover Rate	50%

Holdings [Text Block]

Asset Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	3.0%
Sovereign Government Bonds	3.1%
Exchange-Traded Funds	38.8%
Common Stocks	55.1%

Largest Holdings [Text Block]

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

Table Summary
Eaton Vance Mortgage Opportunities ETF	11.0%
Eaton Vance Total Return Bond ETF	10.8%
iShares Core MSCI Emerging Markets ETF	4.2%
Vanguard Emerging Markets Government Bond ETF	4.1%
iShares TIPS Bond ETF	3.5%
Vanguard Short-Term Treasury ETF	3.2%
Brazil Letras do Tesouro Nacional, 0.00%, 1/1/29	3.1%
NVIDIA Corp.	2.5%
Apple, Inc.	2.3%
Microsoft Corp.	1.8%
Total	46.5%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000104754

Shareholder Report [Line Items]

Fund Name

Eaton Vance All Asset Strategy Fund

Class Name

Class I

Trading Symbol

EIRAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance All Asset Strategy Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$39	0.76%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.76%

^[6]

AssetsNet

$ 234,161,720

Holdings Count | Holding

255

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$234,161,720
# of Portfolio Holdings	255
Portfolio Turnover Rate	50%

Holdings [Text Block]

Asset Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	3.0%
Sovereign Government Bonds	3.1%
Exchange-Traded Funds	38.8%
Common Stocks	55.1%

Largest Holdings [Text Block]

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

Table Summary
Eaton Vance Mortgage Opportunities ETF	11.0%
Eaton Vance Total Return Bond ETF	10.8%
iShares Core MSCI Emerging Markets ETF	4.2%
Vanguard Emerging Markets Government Bond ETF	4.1%
iShares TIPS Bond ETF	3.5%
Vanguard Short-Term Treasury ETF	3.2%
Brazil Letras do Tesouro Nacional, 0.00%, 1/1/29	3.1%
NVIDIA Corp.	2.5%
Apple, Inc.	2.3%
Microsoft Corp.	1.8%
Total	46.5%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000092730

Shareholder Report [Line Items]

Fund Name

Eaton Vance Equity Strategy Fund

Class Name

Class A

Trading Symbol

ERBAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Equity Strategy Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$58	1.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.10%

^[7]

AssetsNet

$ 575,932,910

Holdings Count | Holding

252

InvestmentCompanyPortfolioTurnover

109.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$575,932,910
# of Portfolio Holdings	252
Portfolio Turnover Rate	109%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	1.3%
Energy	1.9%
Consumer Staples	2.7%
Materials	3.2%
Utilities	3.4%
Short-Term Investments	5.9%
Communication Services	6.3%
Consumer Discretionary	6.8%
Health Care	7.2%
Exchange-Traded Funds	9.1%
Industrials	16.6%
Financials	17.1%
Information Technology	18.5%

Largest Holdings [Text Block]

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

Table Summary
iShares Core MSCI Emerging Markets ETF	5.1%
NVIDIA Corp.	4.0%
Apple, Inc.	3.6%
Microsoft Corp.	2.8%
Amazon.com, Inc.	2.0%
Alphabet, Inc., Class A	1.9%
iShares MSCI Brazil ETF	1.8%
Meta Platforms, Inc., Class A	1.5%
Broadcom, Inc.	1.5%
iShares MSCI Taiwan ETF	1.2%
Total	25.4%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000092731

Shareholder Report [Line Items]

Fund Name

Eaton Vance Equity Strategy Fund

Class Name

Class C

Trading Symbol

ERBCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Equity Strategy Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$97	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 97

Expense Ratio, Percent

1.85%

^[8]

AssetsNet

$ 575,932,910

Holdings Count | Holding

252

InvestmentCompanyPortfolioTurnover

109.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$575,932,910
# of Portfolio Holdings	252
Portfolio Turnover Rate	109%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	1.3%
Energy	1.9%
Consumer Staples	2.7%
Materials	3.2%
Utilities	3.4%
Short-Term Investments	5.9%
Communication Services	6.3%
Consumer Discretionary	6.8%
Health Care	7.2%
Exchange-Traded Funds	9.1%
Industrials	16.6%
Financials	17.1%
Information Technology	18.5%

Largest Holdings [Text Block]

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

Table Summary
iShares Core MSCI Emerging Markets ETF	5.1%
NVIDIA Corp.	4.0%
Apple, Inc.	3.6%
Microsoft Corp.	2.8%
Amazon.com, Inc.	2.0%
Alphabet, Inc., Class A	1.9%
iShares MSCI Brazil ETF	1.8%
Meta Platforms, Inc., Class A	1.5%
Broadcom, Inc.	1.5%
iShares MSCI Taiwan ETF	1.2%
Total	25.4%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000092732

Shareholder Report [Line Items]

Fund Name

Eaton Vance Equity Strategy Fund

Class Name

Class I

Trading Symbol

ERBIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Equity Strategy Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$45	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.85%

^[9]

AssetsNet

$ 575,932,910

Holdings Count | Holding

252

InvestmentCompanyPortfolioTurnover

109.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$575,932,910
# of Portfolio Holdings	252
Portfolio Turnover Rate	109%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	1.3%
Energy	1.9%
Consumer Staples	2.7%
Materials	3.2%
Utilities	3.4%
Short-Term Investments	5.9%
Communication Services	6.3%
Consumer Discretionary	6.8%
Health Care	7.2%
Exchange-Traded Funds	9.1%
Industrials	16.6%
Financials	17.1%
Information Technology	18.5%

Largest Holdings [Text Block]

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

Table Summary
iShares Core MSCI Emerging Markets ETF	5.1%
NVIDIA Corp.	4.0%
Apple, Inc.	3.6%
Microsoft Corp.	2.8%
Amazon.com, Inc.	2.0%
Alphabet, Inc., Class A	1.9%
iShares MSCI Brazil ETF	1.8%
Meta Platforms, Inc., Class A	1.5%
Broadcom, Inc.	1.5%
iShares MSCI Taiwan ETF	1.2%
Total	25.4%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000014191

Shareholder Report [Line Items]

Fund Name

Eaton Vance Worldwide Health Sciences Fund

Class Name

Class A

Trading Symbol

ETHSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Worldwide Health Sciences Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$61	1.15%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.15%

^[10]

AssetsNet

$ 857,110,223

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$857,110,223
# of Portfolio Holdings	45
Portfolio Turnover Rate	16%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference*}
Health Care Technology	0.6%
Health Care Services	0.7%
Health Care Distributors	1.1%
Health Care Supplies	1.5%
Managed Health Care	3.7%
Life Sciences Tools & Services	7.7%
Health Care Equipment	15.9%
Biotechnology	20.0%
Pharmaceuticals	48.8%

Footnote	Description
Footnote^*	Amount is less than 0.05%

Largest Holdings [Text Block]

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

Table Summary
Eli Lilly & Co.	11.3%
AbbVie, Inc.	6.7%
AstraZeneca PLC	6.5%
Johnson & Johnson	6.3%
Roche Holding AG PC	5.8%
Merck & Co., Inc.	4.4%
Bristol-Myers Squibb Co.	4.1%
UnitedHealth Group, Inc.	3.7%
Vertex Pharmaceuticals, Inc.	3.5%
Gilead Sciences, Inc.	3.3%
Total	55.6%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000014193

Shareholder Report [Line Items]

Fund Name

Eaton Vance Worldwide Health Sciences Fund

Class Name

Class C

Trading Symbol

ECHSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Worldwide Health Sciences Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$100	1.90%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 100

Expense Ratio, Percent

1.90%

^[11]

AssetsNet

$ 857,110,223

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$857,110,223
# of Portfolio Holdings	45
Portfolio Turnover Rate	16%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference*}
Health Care Technology	0.6%
Health Care Services	0.7%
Health Care Distributors	1.1%
Health Care Supplies	1.5%
Managed Health Care	3.7%
Life Sciences Tools & Services	7.7%
Health Care Equipment	15.9%
Biotechnology	20.0%
Pharmaceuticals	48.8%

Footnote	Description
Footnote^*	Amount is less than 0.05%

Largest Holdings [Text Block]

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

Table Summary
Eli Lilly & Co.	11.3%
AbbVie, Inc.	6.7%
AstraZeneca PLC	6.5%
Johnson & Johnson	6.3%
Roche Holding AG PC	5.8%
Merck & Co., Inc.	4.4%
Bristol-Myers Squibb Co.	4.1%
UnitedHealth Group, Inc.	3.7%
Vertex Pharmaceuticals, Inc.	3.5%
Gilead Sciences, Inc.	3.3%
Total	55.6%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000081646

Shareholder Report [Line Items]

Fund Name

Eaton Vance Worldwide Health Sciences Fund

Class Name

Class I

Trading Symbol

EIHSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Worldwide Health Sciences Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$47	0.90%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.90%

^[12]

AssetsNet

$ 857,110,223

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$857,110,223
# of Portfolio Holdings	45
Portfolio Turnover Rate	16%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference*}
Health Care Technology	0.6%
Health Care Services	0.7%
Health Care Distributors	1.1%
Health Care Supplies	1.5%
Managed Health Care	3.7%
Life Sciences Tools & Services	7.7%
Health Care Equipment	15.9%
Biotechnology	20.0%
Pharmaceuticals	48.8%

Footnote	Description
Footnote^*	Amount is less than 0.05%

Largest Holdings [Text Block]

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

Table Summary
Eli Lilly & Co.	11.3%
AbbVie, Inc.	6.7%
AstraZeneca PLC	6.5%
Johnson & Johnson	6.3%
Roche Holding AG PC	5.8%
Merck & Co., Inc.	4.4%
Bristol-Myers Squibb Co.	4.1%
UnitedHealth Group, Inc.	3.7%
Vertex Pharmaceuticals, Inc.	3.5%
Gilead Sciences, Inc.	3.3%
Total	55.6%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

C000014194

Shareholder Report [Line Items]

Fund Name

Eaton Vance Worldwide Health Sciences Fund

Class Name

Class R

Trading Symbol

ERHSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Eaton Vance Worldwide Health Sciences Fund for the period of September 1, 2025 to February 28, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/open-end-mutual-fund-documents.php. You can also request this information by contacting us at 1-800-262-1122.

Additional Information Phone Number

1-800-262-1122

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	$74	1.40%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 74

Expense Ratio, Percent

1.40%

^[13]

AssetsNet

$ 857,110,223

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$857,110,223
# of Portfolio Holdings	45
Portfolio Turnover Rate	16%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference*}
Health Care Technology	0.6%
Health Care Services	0.7%
Health Care Distributors	1.1%
Health Care Supplies	1.5%
Managed Health Care	3.7%
Life Sciences Tools & Services	7.7%
Health Care Equipment	15.9%
Biotechnology	20.0%
Pharmaceuticals	48.8%

Footnote	Description
Footnote^*	Amount is less than 0.05%

Largest Holdings [Text Block]

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

Table Summary
Eli Lilly & Co.	11.3%
AbbVie, Inc.	6.7%
AstraZeneca PLC	6.5%
Johnson & Johnson	6.3%
Roche Holding AG PC	5.8%
Merck & Co., Inc.	4.4%
Bristol-Myers Squibb Co.	4.1%
UnitedHealth Group, Inc.	3.7%
Vertex Pharmaceuticals, Inc.	3.5%
Gilead Sciences, Inc.	3.3%
Total	55.6%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Updated Prospectus Phone Number

1-800-262-1122

[1]	Annualized
[2]	Annualized
[3]	Annualized
[4]	Annualized
[5]	Annualized
[6]	Annualized
[7]	Annualized
[8]	Annualized
[9]	Annualized
[10]	Annualized
[11]	Annualized
[12]	Annualized
[13]	Annualized

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Asset Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Asset Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Asset Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

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

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

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

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

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

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

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

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

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

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

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

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

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