This semi-annual shareholder report contains important information about the Calvert Floating-Rate Advantage Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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/calvert-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	$108	2.16%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 108

Expense Ratio, Percent

^[1]

2.16%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 35,361,411

Holdings Count | Holding

107

InvestmentCompanyPortfolioTurnover

19.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$35,361,411
# of Portfolio Holdings	107
Portfolio Turnover Rate	19%

Holdings [Text Block]

Asset Allocation (% of total investments)

Table Summary
Value	Value
Other^{Footnote Reference†}	1.0%
Short-Term Investments	1.1%
Corporate Bonds	4.2%
Senior Floating-Rate Loans	93.7%

Footnote	Description
Footnote^†	Investment types less than 1% each

Credit Quality (% of total investments)^{Footnote Referencea}

Table Summary
Value	Value
Not Rated	0.7%
CCC or Lower	1.5%
B	58.0%
BB	27.8%
BBB	12.0%

Footnote	Description
Footnote^a	Excludes Short-Term Investments and Equities. Ratings are categorized using S&P Global Ratings (“S&P”). Ratings range from AAA, being the highest, to D, being the lowest. Ratings of BBB or higher are considered to be investment-grade quality. Holdings designated as “Not Rated” (if any) are not rated by S&P.

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

In April 2026, the Fund's Trustees approved the liquidation of the Fund. Effective as of the close of business on June 15, 2026, shares of the Fund will no longer be available for purchase or exchange. All of the Fund’s outstanding shares are expected to be redeemed and the Fund liquidated on or about June 25, 2026.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000194065

Shareholder Report [Line Items]

Fund Name

Calvert Floating-Rate Advantage Fund

Class Name

Class I

Trading Symbol

CFOIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Floating-Rate Advantage Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$97	1.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 97

Expense Ratio, Percent

^[2]

1.93%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 35,361,411

Holdings Count | Holding

107

InvestmentCompanyPortfolioTurnover

19.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$35,361,411
# of Portfolio Holdings	107
Portfolio Turnover Rate	19%

Holdings [Text Block]

Asset Allocation (% of total investments)

Table Summary
Value	Value
Other^{Footnote Reference†}	1.0%
Short-Term Investments	1.1%
Corporate Bonds	4.2%
Senior Floating-Rate Loans	93.7%

Footnote	Description
Footnote^†	Investment types less than 1% each

Credit Quality (% of total investments)^{Footnote Referencea}

Table Summary
Value	Value
Not Rated	0.7%
CCC or Lower	1.5%
B	58.0%
BB	27.8%
BBB	12.0%

Footnote	Description
Footnote^a	Excludes Short-Term Investments and Equities. Ratings are categorized using S&P Global Ratings (“S&P”). Ratings range from AAA, being the highest, to D, being the lowest. Ratings of BBB or higher are considered to be investment-grade quality. Holdings designated as “Not Rated” (if any) are not rated by S&P.

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000194066

Shareholder Report [Line Items]

Fund Name

Calvert Floating-Rate Advantage Fund

Class Name

Class R6

Trading Symbol

CFORX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Floating-Rate Advantage Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$95	1.89%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 95

Expense Ratio, Percent

^[3]

1.89%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 35,361,411

Holdings Count | Holding

107

InvestmentCompanyPortfolioTurnover

19.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$35,361,411
# of Portfolio Holdings	107
Portfolio Turnover Rate	19%

Holdings [Text Block]

Asset Allocation (% of total investments)

Table Summary
Value	Value
Other^{Footnote Reference†}	1.0%
Short-Term Investments	1.1%
Corporate Bonds	4.2%
Senior Floating-Rate Loans	93.7%

Footnote	Description
Footnote^†	Investment types less than 1% each

Credit Quality (% of total investments)^{Footnote Referencea}

Table Summary
Value	Value
Not Rated	0.7%
CCC or Lower	1.5%
B	58.0%
BB	27.8%
BBB	12.0%

Footnote	Description
Footnote^a	Excludes Short-Term Investments and Equities. Ratings are categorized using S&P Global Ratings (“S&P”). Ratings range from AAA, being the highest, to D, being the lowest. Ratings of BBB or higher are considered to be investment-grade quality. Holdings designated as “Not Rated” (if any) are not rated by S&P.

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000241878

Shareholder Report [Line Items]

Fund Name

Calvert Global Equity Fund

Class Name

Class A

Trading Symbol

CGLAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Global Equity Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$57	1.14%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 57

Expense Ratio, Percent

^[4]

1.14%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 10,012,011

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$10,012,011
# of Portfolio Holdings	45
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	1.3%
Australia	1.6%
Taiwan	1.8%
Singapore	1.9%
Hong Kong	2.5%
Japan	3.4%
Netherlands	3.7%
Switzerland	6.5%
France	10.1%
United Kingdom	11.3%
United States	55.9%

Largest Holdings [Text Block]

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

Table Summary
Alphabet, Inc., Class A	5.7%
Microsoft Corp.	5.6%
Amazon.com, Inc.	5.2%
NVIDIA Corp.	4.8%
Nestle SA	3.4%
ASML Holding NV	2.6%
Compass Group PLC	2.6%
Visa, Inc., Class A	2.6%
NextEra Energy, Inc.	2.6%
AIA Group Ltd.	2.5%
Total	37.6%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

In March 2026, the Fund's Trustees approved the liquidation of the Fund. Effective as of the close of business on May 4, 2026, shares of the Fund were no longer available for purchase or exchange. All of the Fund’s outstanding shares were redeemed and the Fund was liquidated at the close of business on May 11, 2026.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000241877

Shareholder Report [Line Items]

Fund Name

Calvert Global Equity Fund

Class Name

Class I

Trading Symbol

CGLIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Global Equity Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$44	0.89%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

^[5]

0.89%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 10,012,011

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$10,012,011
# of Portfolio Holdings	45
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	1.3%
Australia	1.6%
Taiwan	1.8%
Singapore	1.9%
Hong Kong	2.5%
Japan	3.4%
Netherlands	3.7%
Switzerland	6.5%
France	10.1%
United Kingdom	11.3%
United States	55.9%

Largest Holdings [Text Block]

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

Table Summary
Alphabet, Inc., Class A	5.7%
Microsoft Corp.	5.6%
Amazon.com, Inc.	5.2%
NVIDIA Corp.	4.8%
Nestle SA	3.4%
ASML Holding NV	2.6%
Compass Group PLC	2.6%
Visa, Inc., Class A	2.6%
NextEra Energy, Inc.	2.6%
AIA Group Ltd.	2.5%
Total	37.6%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000241880

Shareholder Report [Line Items]

Fund Name

Calvert Global Small-Cap Equity Fund

Class Name

Class A

Trading Symbol

CSMAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Global Small-Cap Equity Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$63	1.31%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

^[6]

1.31%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 16,409,180

Holdings Count | Holding

125

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$16,409,180
# of Portfolio Holdings	125
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	2.6%
Canada	1.3%
Sweden	1.3%
Netherlands	1.6%
Switzerland	2.4%
Australia	2.6%
Germany	3.4%
Italy	3.5%
United Kingdom	10.5%
Japan	10.5%
United States	60.3%

Largest Holdings [Text Block]

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

Table Summary
Relo Group, Inc.	1.9%
CSW Industrials, Inc.	1.8%
Burlington Stores, Inc.	1.6%
Royalty Pharma PLC, Class A	1.6%
Performance Food Group Co.	1.5%
Franklin Electric Co., Inc.	1.5%
Aramark	1.4%
Wyndham Hotels & Resorts, Inc.	1.4%
Valvoline, Inc.	1.4%
Donaldson Co., Inc.	1.4%
Total	15.5%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000241881

Shareholder Report [Line Items]

Fund Name

Calvert Global Small-Cap Equity Fund

Class Name

Class C

Trading Symbol

CSQCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Global Small-Cap Equity Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$99	2.06%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 99

Expense Ratio, Percent

^[7]

2.06%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 16,409,180

Holdings Count | Holding

125

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$16,409,180
# of Portfolio Holdings	125
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	2.6%
Canada	1.3%
Sweden	1.3%
Netherlands	1.6%
Switzerland	2.4%
Australia	2.6%
Germany	3.4%
Italy	3.5%
United Kingdom	10.5%
Japan	10.5%
United States	60.3%

Largest Holdings [Text Block]

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

Table Summary
Relo Group, Inc.	1.9%
CSW Industrials, Inc.	1.8%
Burlington Stores, Inc.	1.6%
Royalty Pharma PLC, Class A	1.6%
Performance Food Group Co.	1.5%
Franklin Electric Co., Inc.	1.5%
Aramark	1.4%
Wyndham Hotels & Resorts, Inc.	1.4%
Valvoline, Inc.	1.4%
Donaldson Co., Inc.	1.4%
Total	15.5%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

C000241879

Shareholder Report [Line Items]

Fund Name

Calvert Global Small-Cap Equity Fund

Class Name

Class I

Trading Symbol

CSPIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Calvert Global Small-Cap Equity Fund for the period of October 1, 2025 to March 31, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php. You can also request this information by contacting us at 1-800-368-2745.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

1-800-368-2745

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	$51	1.06%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

^[8]

1.06%

Material Change Date

Sep. 30, 2025

AssetsNet

$ 16,409,180

Holdings Count | Holding

125

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$16,409,180
# of Portfolio Holdings	125
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	2.6%
Canada	1.3%
Sweden	1.3%
Netherlands	1.6%
Switzerland	2.4%
Australia	2.6%
Germany	3.4%
Italy	3.5%
United Kingdom	10.5%
Japan	10.5%
United States	60.3%

Largest Holdings [Text Block]

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

Table Summary
Relo Group, Inc.	1.9%
CSW Industrials, Inc.	1.8%
Burlington Stores, Inc.	1.6%
Royalty Pharma PLC, Class A	1.6%
Performance Food Group Co.	1.5%
Franklin Electric Co., Inc.	1.5%
Aramark	1.4%
Wyndham Hotels & Resorts, Inc.	1.4%
Valvoline, Inc.	1.4%
Donaldson Co., Inc.	1.4%
Total	15.5%

Footnote	Description
Footnote^a	Excluding cash equivalents

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since September 30, 2025.

Summary of Change Legend [Text Block]

This is a summary of certain changes to the Fund since September 30, 2025.

Updated Prospectus Phone Number

1-800-368-2745

[1]	Annualized
[2]	Annualized
[3]	Annualized
[4]	Annualized
[5]	Annualized
[6]	Annualized
[7]	Annualized
[8]	Annualized

What were the Fund costs for the last six months?

Key Fund Statistics

Asset Allocation (% of total investments)

Credit Quality (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Asset Allocation (% of total investments)

Credit Quality (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Asset Allocation (% of total investments)

Credit Quality (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Material Fund Changes

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Material Fund Changes

Credit Quality (% of total investments)^{Footnote Referencea}

Credit Quality (% of total investments)^{Footnote Referencea}

Credit Quality (% 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}