Shareholder Report | 12 Months Ended |
Sep. 30, 2024 USD ($) Holding | Sep. 30, 2023 |
Shareholder Report [Line Items] | | |
Document Type | N-CSR | |
Amendment Flag | false | |
Registrant Name | CALVERT WORLD VALUES FUND INC | |
Entity Central Index Key | 0000884110 | |
Entity Investment Company Type | N-1A | |
Document Period End Date | Sep. 30, 2024 | |
C000214854 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Emerging Markets Advancement Fund | |
Class Name | Class A | |
Trading Symbol | CEFAX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Emerging Markets Advancement Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $136 1.22% | |
Expenses Paid, Amount | $ 136 | |
Expense Ratio, Percent | 1.22% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI Emerging Markets Index (the Index): ↓ The Fund’s underweight exposure to China detracted most from Index-relative returns as direct Chinese government intervention helped drive market rallies ↓ An underweight exposure to Taiwan ― in particular its largest stock, Taiwan Semiconductor Manufacturing Co. ― detracted from Index-relative returns as the Fund sought to enhance its level of portfolio diversification ↓ The Fund’s underweight exposure to India ― based on the country’s high valuations ― detracted from returns as the Indian market soared despite its lofty prices ↑ An overweight exposure to Greece contributed most to returns as government reforms took hold, the country’s debt rating improved, and its growth accelerated ↑ The Fund’s overweight exposure to Poland aided performance as the election of a pro-European coalition promised a more favorable business environment ↑ An overweight exposure to South Korea early in the period ― later followed by an underweight reallocation ― helped as a rally based on shareholder-friendly actions and a rise in the country’s technology exports shifted course | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class A with Maximum Sales Charge MSCI Emerging Markets Index Calvert Emerging Markets Responsible Index 10/19 $9,475 $10,000 $10,000 11/19 $9,835 $11,676 $10,405 12/19 $10,457 $12,547 $11,153 1/20 $9,971 $11,962 $10,667 2/20 $9,533 $11,331 $10,152 3/20 $8,047 $9,586 $8,529 4/20 $8,571 $10,464 $9,348 5/20 $8,714 $10,544 $9,439 6/20 $9,219 $11,319 $10,192 7/20 $9,876 $12,331 $11,120 8/20 $10,219 $12,603 $11,389 9/20 $10,133 $12,401 $11,231 10/20 $10,228 $12,657 $11,494 11/20 $11,247 $13,827 $12,565 12/20 $12,037 $14,844 $13,426 1/21 $12,409 $15,299 $13,863 2/21 $12,524 $15,416 $14,002 3/21 $12,305 $15,183 $13,733 4/21 $12,571 $15,561 $14,141 5/21 $12,562 $15,922 $14,398 6/21 $12,762 $15,950 $14,459 7/21 $12,009 $14,876 $13,435 8/21 $12,266 $15,266 $13,821 9/21 $11,809 $14,659 $13,170 10/21 $12,181 $14,803 $13,226 11/21 $11,904 $14,200 $12,696 12/21 $12,043 $14,467 $12,893 1/22 $12,063 $14,193 $12,603 2/22 $11,953 $13,769 $12,248 3/22 $11,684 $13,458 $12,088 4/22 $11,345 $12,709 $11,373 5/22 $11,495 $12,765 $11,479 6/22 $10,708 $11,917 $10,520 7/22 $10,748 $11,887 $10,607 8/22 $10,778 $11,937 $10,672 9/22 $9,752 $10,538 $9,452 10/22 $9,971 $10,210 $9,252 11/22 $10,648 $11,725 $10,671 12/22 $10,193 $11,560 $10,503 1/23 $10,948 $12,473 $11,293 2/23 $10,528 $11,664 $10,616 3/23 $10,518 $12,017 $10,841 4/23 $10,539 $11,881 $10,760 5/23 $10,413 $11,682 $10,680 6/23 $10,959 $12,125 $11,124 7/23 $11,557 $12,880 $11,776 8/23 $10,990 $12,087 $11,037 9/23 $10,549 $11,770 $10,732 10/23 $10,077 $11,313 $10,336 11/23 $11,032 $12,219 $11,304 12/23 $11,355 $12,696 $11,774 1/24 $11,182 $12,107 $11,146 2/24 $11,755 $12,683 $11,646 3/24 $12,058 $12,997 $11,961 4/24 $12,079 $13,055 $11,875 5/24 $12,036 $13,129 $12,004 6/24 $12,469 $13,647 $12,486 7/24 $12,728 $13,687 $12,470 8/24 $12,880 $13,908 $12,766 9/24 $12,928 $13,258 $13,627 | |
Average Annual Return [Table Text Block] | AATR 1 Year Since 10/1/19 (Inception) Class A 22.50% 6.40% Class A with 5.25% Maximum Sales Charge 16.03% 5.27% MSCI Emerging Markets Index (net of foreign withholding taxes) 26.05% 5.80% Calvert Emerging Markets Responsible Index Footnote Reference 26.73% 6.38% | |
Performance Inception Date | Oct. 01, 2019 | |
AssetsNet | $ 91,259,604 | |
Holdings Count | Holding | 285 | |
Advisory Fees Paid, Amount | $ 392,624 | |
InvestmentCompanyPortfolioTurnover | 76% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $91,259,604 # of Portfolio Holdings 285 Portfolio Turnover Rate 76% Total Advisory Fees Paid $392,624 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 9.8% Cyprus 3.5% Georgia 4.4% South Africa 4.9% Thailand 5.2% Malaysia 6.4% Poland 9.1% United Arab Emirates 10.1% Taiwan 13.3% India 15.9% Greece 17.4% Top Ten Holdings (% of total investments) Footnote Reference Taiwan Semiconductor Manufacturing Co. Ltd. 5.4% Bank of Cyprus Holdings PLC 3.5% Aldar Properties PJSC 3.5% Emirates Telecommunications Group Co. PJSC 3.3% National Bank of Greece SA 2.8% Public Power Corp. SA 2.5% Eurobank Ergasias Services & Holdings SA, Class A 2.5% Nova Ljubljanska Banka DD GDR 2.4% FPT Corp. 2.0% Piraeus Financial Holdings SA 1.9% Total 29.8% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000214852 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Emerging Markets Advancement Fund | |
Class Name | Class I | |
Trading Symbol | CEFIX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Emerging Markets Advancement Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B45"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $108 0.97% | |
Expenses Paid, Amount | $ 108 | |
Expense Ratio, Percent | 0.97% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI Emerging Markets Index (the Index): ↓ The Fund’s underweight exposure to China detracted most from Index-relative returns as direct Chinese government intervention helped drive market rallies ↓ An underweight exposure to Taiwan ― in particular its largest stock, Taiwan Semiconductor Manufacturing Co. ― detracted from Index-relative returns as the Fund sought to enhance its level of portfolio diversification ↓ The Fund’s underweight exposure to India ― based on the country’s high valuations ― detracted from returns as the Indian market soared despite its lofty prices ↑ An overweight exposure to Greece contributed most to returns as government reforms took hold, the country’s debt rating improved, and its growth accelerated ↑ The Fund’s overweight exposure to Poland aided performance as the election of a pro-European coalition promised a more favorable business environment ↑ An overweight exposure to South Korea early in the period ― later followed by an underweight reallocation ― helped as a rally based on shareholder-friendly actions and a rise in the country’s technology exports shifted course | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class I MSCI Emerging Markets Index Calvert Emerging Markets Responsible Index 10/19 $1,000,000 $1,000,000 $1,000,000 11/19 $1,038,997 $1,167,595 $1,040,479 12/19 $1,104,599 $1,254,704 $1,115,295 1/20 $1,053,341 $1,196,217 $1,066,749 2/20 $1,007,108 $1,133,136 $1,015,169 3/20 $850,310 $958,608 $852,868 4/20 $905,587 $1,046,391 $934,757 5/20 $920,665 $1,054,428 $943,894 6/20 $973,933 $1,131,938 $1,019,217 7/20 $1,043,282 $1,233,090 $1,112,044 8/20 $1,080,469 $1,260,347 $1,138,875 9/20 $1,071,420 $1,240,132 $1,123,137 10/20 $1,082,481 $1,265,682 $1,149,434 11/20 $1,190,031 $1,382,742 $1,256,496 12/20 $1,274,099 $1,484,392 $1,342,632 1/21 $1,313,350 $1,529,900 $1,386,342 2/21 $1,326,427 $1,541,602 $1,400,170 3/21 $1,302,282 $1,518,320 $1,373,293 4/21 $1,331,471 $1,556,123 $1,414,052 5/21 $1,330,469 $1,592,210 $1,439,842 6/21 $1,352,610 $1,594,954 $1,445,864 7/21 $1,272,102 $1,487,616 $1,343,501 8/21 $1,300,281 $1,526,554 $1,382,068 9/21 $1,251,974 $1,465,888 $1,317,005 10/21 $1,291,224 $1,480,346 $1,322,646 11/21 $1,263,044 $1,420,017 $1,269,581 12/21 $1,277,709 $1,446,662 $1,289,331 1/22 $1,279,814 $1,419,278 $1,260,272 2/22 $1,268,237 $1,376,855 $1,224,775 3/22 $1,239,820 $1,345,758 $1,208,783 4/22 $1,205,088 $1,270,898 $1,137,318 5/22 $1,220,875 $1,276,494 $1,147,913 6/22 $1,136,677 $1,191,671 $1,051,988 7/22 $1,142,992 $1,188,744 $1,060,700 8/22 $1,145,097 $1,193,707 $1,067,201 9/22 $1,036,691 $1,053,766 $945,207 10/22 $1,059,846 $1,021,048 $925,212 11/22 $1,131,415 $1,172,488 $1,067,075 12/22 $1,084,596 $1,156,008 $1,050,349 1/23 $1,165,636 $1,247,288 $1,129,285 2/23 $1,121,231 $1,166,411 $1,061,596 3/23 $1,119,010 $1,201,738 $1,084,099 4/23 $1,121,231 $1,188,119 $1,075,958 5/23 $1,109,019 $1,168,163 $1,068,007 6/23 $1,167,856 $1,212,518 $1,112,442 7/23 $1,231,133 $1,287,999 $1,177,642 8/23 $1,171,186 $1,208,658 $1,103,749 9/23 $1,124,561 $1,177,049 $1,073,205 10/23 $1,073,495 $1,131,315 $1,033,588 11/23 $1,175,627 $1,221,854 $1,130,363 12/23 $1,210,203 $1,269,621 $1,177,352 1/24 $1,191,866 $1,210,668 $1,114,570 2/24 $1,253,752 $1,268,263 $1,164,620 3/24 $1,286,986 $1,299,690 $1,196,051 4/24 $1,289,278 $1,305,505 $1,187,512 5/24 $1,284,694 $1,312,879 $1,200,443 6/24 $1,331,681 $1,364,663 $1,248,573 7/24 $1,359,186 $1,368,725 $1,247,015 8/24 $1,375,230 $1,390,823 $1,276,608 9/24 $1,380,964 $1,325,807 $1,362,750 | |
Average Annual Return [Table Text Block] | AATR 1 Year Since 10/1/19 (Inception) Class I 22.80% 6.66% MSCI Emerging Markets Index (net of foreign withholding taxes) 26.05% 5.80% Calvert Emerging Markets Responsible Index Footnote Reference 26.73% 6.38% | |
Performance Inception Date | Oct. 01, 2019 | |
AssetsNet | $ 91,259,604 | |
Holdings Count | Holding | 285 | |
Advisory Fees Paid, Amount | $ 392,624 | |
InvestmentCompanyPortfolioTurnover | 76% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $91,259,604 # of Portfolio Holdings 285 Portfolio Turnover Rate 76% Total Advisory Fees Paid $392,624 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 9.8% Cyprus 3.5% Georgia 4.4% South Africa 4.9% Thailand 5.2% Malaysia 6.4% Poland 9.1% United Arab Emirates 10.1% Taiwan 13.3% India 15.9% Greece 17.4% Top Ten Holdings (% of total investments) Footnote Reference Taiwan Semiconductor Manufacturing Co. Ltd. 5.4% Bank of Cyprus Holdings PLC 3.5% Aldar Properties PJSC 3.5% Emirates Telecommunications Group Co. PJSC 3.3% National Bank of Greece SA 2.8% Public Power Corp. SA 2.5% Eurobank Ergasias Services & Holdings SA, Class A 2.5% Nova Ljubljanska Banka DD GDR 2.4% FPT Corp. 2.0% Piraeus Financial Holdings SA 1.9% Total 29.8% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000118372 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Emerging Markets Equity Fund | |
Class Name | Class A | |
Trading Symbol | CVMAX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Emerging Markets Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
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 | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B72"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $143 1.28% | |
Expenses Paid, Amount | $ 143 | |
Expense Ratio, Percent | 1.28% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI Emerging Markets Index (the Index): ↓ An underweight position in Alibaba Group Holding Ltd. hurt returns as Chinese e-commerce benefited from government stimulus. The stock was sold by period-end ↓ An overweight position in Samsung Electronics Co., a leading memory chipmaker, detracted from returns relative to the Index as analysts forecasted a slowdown in demand for smartphones and PCs ↓ An overweight position in Shenzhen Inovance Technology Co., an industrial automation firm, detracted from returns relative to the Index due to a downturn in demand for solar-driven products as well as competitive pricing pressures ↑ Taiwan Semiconductor Manufacturing Co. contributed to returns as its technological leadership was seen as key for AI semiconductors ↑ Micron Technology, Inc., a maker of computer memory and data storage products, helped returns as price hikes for memory chips led to strong sales and earnings ↑ An allocation to Lotes Co., a supplier of connectors and sockets, aided returns on solid revenue and gross margins driven by demand for PCs and server sockets | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class A with Maximum Sales Charge MSCI Emerging Markets Index 9/14 $9,475 $10,000 10/14 $9,727 $10,118 11/14 $9,720 $10,011 12/14 $9,303 $9,550 1/15 $9,482 $9,607 2/15 $9,683 $9,904 3/15 $9,653 $9,763 4/15 $10,116 $10,514 5/15 $10,086 $10,093 6/15 $9,668 $9,831 7/15 $9,206 $9,150 8/15 $8,363 $8,322 9/15 $8,131 $8,072 10/15 $8,683 $8,648 11/15 $8,616 $8,310 12/15 $8,579 $8,125 1/16 $8,157 $7,598 2/16 $8,105 $7,585 3/16 $8,918 $8,589 4/16 $8,850 $8,636 5/16 $8,684 $8,314 6/16 $8,895 $8,646 7/16 $9,264 $9,081 8/16 $9,459 $9,307 9/16 $9,738 $9,426 10/16 $9,715 $9,449 11/16 $9,264 $9,014 12/16 $9,141 $9,034 1/17 $9,580 $9,528 2/17 $9,814 $9,820 3/17 $10,283 $10,068 4/17 $10,616 $10,288 5/17 $11,101 $10,592 6/17 $11,350 $10,699 7/17 $11,827 $11,337 8/17 $12,311 $11,590 9/17 $12,357 $11,544 10/17 $12,675 $11,948 11/17 $12,697 $11,972 12/17 $13,181 $12,402 1/18 $14,105 $13,436 2/18 $13,499 $12,816 3/18 $13,461 $12,578 4/18 $12,999 $12,522 5/18 $12,582 $12,078 6/18 $11,953 $11,577 7/18 $12,142 $11,831 8/18 $11,915 $11,511 9/18 $11,786 $11,450 10/18 $10,831 $10,453 11/18 $11,412 $10,884 12/18 $11,130 $10,595 1/19 $12,039 $11,523 2/19 $12,138 $11,549 3/19 $12,375 $11,646 4/19 $12,742 $11,891 5/19 $11,687 $11,028 6/19 $12,535 $11,716 7/19 $12,382 $11,573 8/19 $11,962 $11,009 9/19 $12,260 $11,219 10/19 $12,772 $11,692 11/19 $12,810 $11,676 12/19 $13,624 $12,547 1/20 $12,917 $11,962 2/20 $12,388 $11,331 3/20 $10,400 $9,586 4/20 $11,283 $10,464 5/20 $11,459 $10,544 6/20 $12,526 $11,319 7/20 $13,731 $12,331 8/20 $14,291 $12,603 9/20 $14,077 $12,401 10/20 $14,530 $12,657 11/20 $15,819 $13,827 12/20 $16,969 $14,844 1/21 $17,300 $15,299 2/21 $17,600 $15,416 3/21 $17,369 $15,183 4/21 $17,385 $15,561 5/21 $17,654 $15,922 6/21 $17,608 $15,950 7/21 $16,699 $14,876 8/21 $16,946 $15,266 9/21 $16,145 $14,659 10/21 $16,307 $14,803 11/21 $15,560 $14,200 12/21 $15,670 $14,467 1/22 $15,562 $14,193 2/22 $14,697 $13,769 3/22 $14,218 $13,458 4/22 $13,052 $12,709 5/22 $13,021 $12,765 6/22 $12,094 $11,917 7/22 $12,450 $11,887 8/22 $12,434 $11,937 9/22 $11,013 $10,538 10/22 $10,812 $10,210 11/22 $12,558 $11,725 12/22 $12,104 $11,560 1/23 $13,361 $12,473 2/23 $12,251 $11,664 3/23 $12,639 $12,017 4/23 $12,445 $11,881 5/23 $12,080 $11,682 6/23 $12,593 $12,125 7/23 $13,222 $12,880 8/23 $12,329 $12,087 9/23 $11,809 $11,770 10/23 $11,428 $11,313 11/23 $12,251 $12,219 12/23 $12,646 $12,696 1/24 $12,051 $12,107 2/24 $12,513 $12,683 3/24 $12,896 $12,997 4/24 $12,888 $13,055 5/24 $13,123 $13,129 6/24 $13,576 $13,647 7/24 $13,639 $13,687 8/24 $13,655 $13,908 9/24 $14,553 $14,837 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class A 23.25% 3.49% 4.38% Class A with 5.25% Maximum Sales Charge 16.80% 2.38% 3.82% MSCI Emerging Markets Index (net of foreign withholding taxes) 26.05% 5.74% 4.02% | |
Material Change Date | | Sep. 30, 2023 |
AssetsNet | $ 1,486,454,881 | |
Holdings Count | Holding | 61 | |
Advisory Fees Paid, Amount | $ 11,919,013 | |
InvestmentCompanyPortfolioTurnover | 36% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,486,454,881 # of Portfolio Holdings 61 Portfolio Turnover Rate 36% Total Advisory Fees Paid $11,919,013 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 11.3% Canada 2.2% Singapore 2.5% Hungary 3.1% Hong Kong 4.7% Brazil 5.1% South Africa 5.4% South Korea 10.8% India 14.9% Taiwan 15.9% China 24.1% Top Ten Holdings (% of total investments) Footnote Reference Taiwan Semiconductor Manufacturing Co. Ltd. 9.1% Tencent Holdings Ltd. 5.9% Samsung Electronics Co. Ltd. 5.4% HDFC Bank Ltd. 3.1% Richter Gedeon Nyrt 3.1% Itausa SA, PFC Shares 2.9% ICICI Bank Ltd. 2.9% Infosys Ltd. 2.8% KB Financial Group, Inc. 2.4% NARI Technology Co. Ltd., Class A 2.3% Total 39.9% 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, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Material Fund Change Risks Change [Text Block] | In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000118373 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Emerging Markets Equity Fund | |
Class Name | Class C | |
Trading Symbol | CVMCX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Emerging Markets Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
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 | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B101"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 C $226 2.03% | |
Expenses Paid, Amount | $ 226 | |
Expense Ratio, Percent | 2.03% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI Emerging Markets Index (the Index): ↓ An underweight position in Alibaba Group Holding Ltd. hurt returns as Chinese e-commerce benefited from government stimulus. The stock was sold by period-end ↓ An overweight position in Samsung Electronics Co., a leading memory chipmaker, detracted from returns relative to the Index as analysts forecasted a slowdown in demand for smartphones and PCs ↓ An overweight position in Shenzhen Inovance Technology Co., an industrial automation firm, detracted from returns relative to the Index due to a downturn in demand for solar-driven products as well as competitive pricing pressures ↑ Taiwan Semiconductor Manufacturing Co. contributed to returns as its technological leadership was seen as key for AI semiconductors ↑ Micron Technology, Inc., a maker of computer memory and data storage products, helped returns as price hikes for memory chips led to strong sales and earnings ↑ An allocation to Lotes Co., a supplier of connectors and sockets, aided returns on solid revenue and gross margins driven by demand for PCs and server sockets | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class C MSCI Emerging Markets Index 9/14 $10,000 $10,000 10/14 $10,260 $10,118 11/14 $10,245 $10,011 12/14 $9,793 $9,550 1/15 $9,975 $9,607 2/15 $10,181 $9,904 3/15 $10,141 $9,763 4/15 $10,616 $10,514 5/15 $10,576 $10,093 6/15 $10,133 $9,831 7/15 $9,642 $9,150 8/15 $8,748 $8,322 9/15 $8,502 $8,072 10/15 $9,072 $8,648 11/15 $9,001 $8,310 12/15 $8,955 $8,125 1/16 $8,504 $7,598 2/16 $8,448 $7,585 3/16 $9,288 $8,589 4/16 $9,217 $8,636 5/16 $9,035 $8,314 6/16 $9,249 $8,646 7/16 $9,629 $9,081 8/16 $9,827 $9,307 9/16 $10,113 $9,426 10/16 $10,081 $9,449 11/16 $9,605 $9,014 12/16 $9,468 $9,034 1/17 $9,920 $9,528 2/17 $10,151 $9,820 3/17 $10,635 $10,068 4/17 $10,968 $10,288 5/17 $11,460 $10,592 6/17 $11,722 $10,699 7/17 $12,198 $11,337 8/17 $12,690 $11,590 9/17 $12,730 $11,544 10/17 $13,055 $11,948 11/17 $13,063 $11,972 12/17 $13,555 $12,402 1/18 $14,492 $13,436 2/18 $13,865 $12,816 3/18 $13,817 $12,578 4/18 $13,333 $12,522 5/18 $12,897 $12,078 6/18 $12,246 $11,577 7/18 $12,436 $11,831 8/18 $12,190 $11,511 9/18 $12,047 $11,450 10/18 $11,071 $10,453 11/18 $11,652 $10,884 12/18 $11,357 $10,595 1/19 $12,282 $11,523 2/19 $12,369 $11,549 3/19 $12,600 $11,646 4/19 $12,975 $11,891 5/19 $11,891 $11,028 6/19 $12,744 $11,716 7/19 $12,584 $11,573 8/19 $12,146 $11,009 9/19 $12,449 $11,219 10/19 $12,959 $11,692 11/19 $12,983 $11,676 12/19 $13,796 $12,547 1/20 $13,070 $11,962 2/20 $12,528 $11,331 3/20 $10,512 $9,586 4/20 $11,405 $10,464 5/20 $11,572 $10,544 6/20 $12,640 $11,319 7/20 $13,852 $12,331 8/20 $14,401 $12,603 9/20 $14,178 $12,401 10/20 $14,632 $12,657 11/20 $15,915 $13,827 12/20 $17,063 $14,844 1/21 $17,382 $15,299 2/21 $17,669 $15,416 3/21 $17,430 $15,183 4/21 $17,430 $15,561 5/21 $17,693 $15,922 6/21 $17,637 $15,950 7/21 $16,713 $14,876 8/21 $16,952 $15,266 9/21 $16,139 $14,659 10/21 $16,290 $14,803 11/21 $15,533 $14,200 12/21 $15,637 $14,467 1/22 $15,517 $14,193 2/22 $14,649 $13,769 3/22 $14,162 $13,458 4/22 $12,991 $12,709 5/22 $12,951 $12,765 6/22 $12,019 $11,917 7/22 $12,369 $11,887 8/22 $12,345 $11,937 9/22 $10,927 $10,538 10/22 $10,719 $10,210 11/22 $12,441 $11,725 12/22 $11,987 $11,560 1/23 $13,222 $12,473 2/23 $12,114 $11,664 3/23 $12,489 $12,017 4/23 $12,297 $11,881 5/23 $11,923 $11,682 6/23 $12,417 $12,125 7/23 $13,039 $12,880 8/23 $12,146 $12,087 9/23 $11,628 $11,770 10/23 $11,245 $11,313 11/23 $12,050 $12,219 12/23 $12,425 $12,696 1/24 $11,835 $12,107 2/24 $12,282 $12,683 3/24 $12,648 $12,997 4/24 $12,632 $13,055 5/24 $12,855 $13,129 6/24 $13,294 $13,647 7/24 $13,349 $13,687 8/24 $13,357 $13,908 9/24 $14,440 $14,837 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class C 22.34% 2.70% 3.74% Class C with 1% Maximum Deferred Sales Charge 21.34% 2.70% 3.74% MSCI Emerging Markets Index (net of foreign withholding taxes) 26.05% 5.74% 4.02% | |
Material Change Date | | Sep. 30, 2023 |
AssetsNet | $ 1,486,454,881 | |
Holdings Count | Holding | 61 | |
Advisory Fees Paid, Amount | $ 11,919,013 | |
InvestmentCompanyPortfolioTurnover | 36% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,486,454,881 # of Portfolio Holdings 61 Portfolio Turnover Rate 36% Total Advisory Fees Paid $11,919,013 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 11.3% Canada 2.2% Singapore 2.5% Hungary 3.1% Hong Kong 4.7% Brazil 5.1% South Africa 5.4% South Korea 10.8% India 14.9% Taiwan 15.9% China 24.1% Top Ten Holdings (% of total investments) Footnote Reference Taiwan Semiconductor Manufacturing Co. Ltd. 9.1% Tencent Holdings Ltd. 5.9% Samsung Electronics Co. Ltd. 5.4% HDFC Bank Ltd. 3.1% Richter Gedeon Nyrt 3.1% Itausa SA, PFC Shares 2.9% ICICI Bank Ltd. 2.9% Infosys Ltd. 2.8% KB Financial Group, Inc. 2.4% NARI Technology Co. Ltd., Class A 2.3% Total 39.9% 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, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Material Fund Change Risks Change [Text Block] | In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000118374 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Emerging Markets Equity Fund | |
Class Name | Class I | |
Trading Symbol | CVMIX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Emerging Markets Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
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 | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B130"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $115 1.03% | |
Expenses Paid, Amount | $ 115 | |
Expense Ratio, Percent | 1.03% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI Emerging Markets Index (the Index): ↓ An underweight position in Alibaba Group Holding Ltd. hurt returns as Chinese e-commerce benefited from government stimulus. The stock was sold by period-end ↓ An overweight position in Samsung Electronics Co., a leading memory chipmaker, detracted from returns relative to the Index as analysts forecasted a slowdown in demand for smartphones and PCs ↓ An overweight position in Shenzhen Inovance Technology Co., an industrial automation firm, detracted from returns relative to the Index due to a downturn in demand for solar-driven products as well as competitive pricing pressures ↑ Taiwan Semiconductor Manufacturing Co. contributed to returns as its technological leadership was seen as key for AI semiconductors ↑ Micron Technology, Inc., a maker of computer memory and data storage products, helped returns as price hikes for memory chips led to strong sales and earnings ↑ An allocation to Lotes Co., a supplier of connectors and sockets, aided returns on solid revenue and gross margins driven by demand for PCs and server sockets | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class I MSCI Emerging Markets Index 9/14 $1,000,000 $1,000,000 10/14 $1,027,152 $1,011,791 11/14 $1,027,146 $1,001,089 12/14 $982,979 $954,953 1/15 $1,001,774 $960,677 2/15 $1,024,487 $990,422 3/15 $1,021,359 $976,338 4/15 $1,070,702 $1,051,433 5/15 $1,067,571 $1,009,327 6/15 $1,023,715 $983,113 7/15 $975,152 $914,965 8/15 $885,858 $832,209 9/15 $860,790 $807,173 10/15 $920,319 $864,752 11/15 $913,266 $831,020 12/15 $910,351 $812,495 1/16 $865,151 $759,785 2/16 $859,599 $758,542 3/16 $946,036 $858,918 4/16 $939,689 $863,586 5/16 $922,241 $831,373 6/16 $945,243 $864,600 7/16 $984,104 $908,109 8/16 $1,005,512 $930,677 9/16 $1,035,641 $942,644 10/16 $1,033,267 $944,892 11/16 $985,688 $901,398 12/16 $972,553 $903,388 1/17 $1,019,743 $952,824 2/17 $1,044,532 $981,992 3/17 $1,095,723 $1,006,781 4/17 $1,130,919 $1,028,822 5/17 $1,182,900 $1,059,239 6/17 $1,210,089 $1,069,902 7/17 $1,261,278 $1,133,678 8/17 $1,313,274 $1,158,965 9/17 $1,318,066 $1,154,357 10/17 $1,353,266 $1,194,824 11/17 $1,355,673 $1,197,222 12/17 $1,407,419 $1,240,199 1/18 $1,506,859 $1,343,565 2/18 $1,441,907 $1,281,600 3/18 $1,438,690 $1,257,771 4/18 $1,388,961 $1,252,206 5/18 $1,345,662 $1,207,836 6/18 $1,278,304 $1,157,654 7/18 $1,299,150 $1,183,084 8/18 $1,275,083 $1,151,095 9/18 $1,261,448 $1,144,985 10/18 $1,160,408 $1,045,277 11/18 $1,222,306 $1,088,353 12/18 $1,193,087 $1,059,521 1/19 $1,290,477 $1,152,290 2/19 $1,301,027 $1,154,880 3/19 $1,326,186 $1,164,573 4/19 $1,366,778 $1,189,090 5/19 $1,253,142 $1,102,808 6/19 $1,344,858 $1,171,635 7/19 $1,328,625 $1,157,308 8/19 $1,283,978 $1,100,882 9/19 $1,316,440 $1,121,897 10/19 $1,371,624 $1,169,204 11/19 $1,375,691 $1,167,595 12/19 $1,463,382 $1,254,704 1/20 $1,387,354 $1,196,217 2/20 $1,330,955 $1,133,136 3/20 $1,117,576 $958,608 4/20 $1,213,230 $1,046,391 5/20 $1,232,025 $1,054,428 6/20 $1,346,480 $1,131,938 7/20 $1,477,275 $1,233,090 8/20 $1,537,762 $1,260,347 9/20 $1,514,865 $1,240,132 10/20 $1,564,748 $1,265,682 11/20 $1,703,740 $1,382,742 12/20 $1,827,390 $1,484,392 1/21 $1,863,527 $1,529,900 2/21 $1,895,549 $1,541,602 3/21 $1,871,751 $1,518,320 4/21 $1,873,408 $1,556,123 5/21 $1,902,953 $1,592,210 6/21 $1,898,043 $1,594,954 7/21 $1,800,367 $1,487,616 8/21 $1,828,279 $1,526,554 9/21 $1,741,257 $1,465,888 10/21 $1,759,319 $1,480,346 11/21 $1,679,685 $1,420,017 12/21 $1,691,715 $1,446,662 1/22 $1,680,134 $1,419,278 2/22 $1,586,655 $1,376,855 3/22 $1,536,193 $1,345,758 4/22 $1,409,625 $1,270,898 5/22 $1,407,143 $1,276,494 6/22 $1,307,046 $1,191,671 7/22 $1,345,927 $1,188,744 8/22 $1,344,272 $1,193,707 9/22 $1,191,232 $1,053,766 10/22 $1,168,896 $1,021,048 11/22 $1,358,335 $1,172,488 12/22 $1,309,689 $1,156,008 1/23 $1,446,410 $1,247,288 2/23 $1,326,362 $1,166,411 3/23 $1,368,879 $1,201,738 4/23 $1,348,038 $1,188,119 5/23 $1,308,855 $1,168,163 6/23 $1,363,877 $1,212,518 7/23 $1,433,072 $1,287,999 8/23 $1,336,366 $1,208,658 9/23 $1,279,677 $1,177,049 10/23 $1,238,828 $1,131,315 11/23 $1,328,863 $1,221,854 12/23 $1,371,614 $1,269,621 1/24 $1,307,661 $1,210,668 2/24 $1,358,150 $1,268,263 3/24 $1,400,224 $1,299,690 4/24 $1,399,383 $1,305,505 5/24 $1,424,627 $1,312,879 6/24 $1,474,274 $1,364,663 7/24 $1,481,848 $1,368,725 8/24 $1,483,531 $1,390,823 9/24 $1,581,882 $1,483,696 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class I 23.62% 3.74% 4.69% MSCI Emerging Markets Index (net of foreign withholding taxes) 26.05% 5.74% 4.02% | |
Material Change Date | | Sep. 30, 2023 |
AssetsNet | $ 1,486,454,881 | |
Holdings Count | Holding | 61 | |
Advisory Fees Paid, Amount | $ 11,919,013 | |
InvestmentCompanyPortfolioTurnover | 36% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,486,454,881 # of Portfolio Holdings 61 Portfolio Turnover Rate 36% Total Advisory Fees Paid $11,919,013 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 11.3% Canada 2.2% Singapore 2.5% Hungary 3.1% Hong Kong 4.7% Brazil 5.1% South Africa 5.4% South Korea 10.8% India 14.9% Taiwan 15.9% China 24.1% Top Ten Holdings (% of total investments) Footnote Reference Taiwan Semiconductor Manufacturing Co. Ltd. 9.1% Tencent Holdings Ltd. 5.9% Samsung Electronics Co. Ltd. 5.4% HDFC Bank Ltd. 3.1% Richter Gedeon Nyrt 3.1% Itausa SA, PFC Shares 2.9% ICICI Bank Ltd. 2.9% Infosys Ltd. 2.8% KB Financial Group, Inc. 2.4% NARI Technology Co. Ltd., Class A 2.3% Total 39.9% 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, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Material Fund Change Risks Change [Text Block] | In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000199810 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Emerging Markets Equity Fund | |
Class Name | Class R6 | |
Trading Symbol | CVMRX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Emerging Markets Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
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 | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B159"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 R6 $107 0.96% | |
Expenses Paid, Amount | $ 107 | |
Expense Ratio, Percent | 0.96% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI Emerging Markets Index (the Index): ↓ An underweight position in Alibaba Group Holding Ltd. hurt returns as Chinese e-commerce benefited from government stimulus. The stock was sold by period-end ↓ An overweight position in Samsung Electronics Co., a leading memory chipmaker, detracted from returns relative to the Index as analysts forecasted a slowdown in demand for smartphones and PCs ↓ An overweight position in Shenzhen Inovance Technology Co., an industrial automation firm, detracted from returns relative to the Index due to a downturn in demand for solar-driven products as well as competitive pricing pressures ↑ Taiwan Semiconductor Manufacturing Co. contributed to returns as its technological leadership was seen as key for AI semiconductors ↑ Micron Technology, Inc., a maker of computer memory and data storage products, helped returns as price hikes for memory chips led to strong sales and earnings ↑ An allocation to Lotes Co., a supplier of connectors and sockets, aided returns on solid revenue and gross margins driven by demand for PCs and server sockets | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class R6 MSCI Emerging Markets Index 9/14 $5,000,000 $5,000,000 10/14 $5,135,747 $5,058,954 11/14 $5,135,747 $5,005,444 12/14 $4,914,889 $4,774,764 1/15 $5,008,879 $4,803,386 2/15 $5,122,450 $4,952,112 3/15 $5,106,785 $4,881,691 4/15 $5,353,509 $5,257,167 5/15 $5,337,844 $5,046,636 6/15 $5,118,534 $4,915,567 7/15 $4,875,727 $4,574,826 8/15 $4,429,275 $4,161,047 9/15 $4,303,955 $4,035,867 10/15 $4,601,590 $4,323,761 11/15 $4,566,343 $4,155,101 12/15 $4,551,795 $4,062,477 1/16 $4,325,791 $3,798,927 2/16 $4,298,036 $3,792,711 3/16 $4,730,219 $4,294,591 4/16 $4,698,499 $4,317,931 5/16 $4,611,270 $4,156,864 6/16 $4,726,254 $4,323,002 7/16 $4,920,538 $4,540,543 8/16 $5,027,592 $4,653,385 9/16 $5,178,262 $4,713,221 10/16 $5,166,367 $4,724,459 11/16 $4,928,468 $4,506,988 12/16 $4,862,740 $4,516,940 1/17 $5,098,679 $4,764,120 2/17 $5,222,647 $4,909,959 3/17 $5,478,580 $5,033,903 4/17 $5,654,535 $5,144,112 5/17 $5,914,467 $5,296,195 6/17 $6,050,432 $5,349,509 7/17 $6,306,366 $5,668,391 8/17 $6,566,298 $5,794,827 9/17 $6,590,292 $5,771,785 10/17 $6,766,247 $5,974,120 11/17 $6,778,244 $5,986,112 12/17 $7,036,934 $6,200,996 1/18 $7,534,131 $6,717,823 2/18 $7,209,349 $6,408,002 3/18 $7,189,301 $6,288,855 4/18 $6,940,703 $6,261,032 5/18 $6,720,172 $6,039,178 6/18 $6,387,371 $5,788,269 7/18 $6,487,612 $5,915,421 8/18 $6,367,323 $5,755,473 9/18 $6,303,168 $5,724,927 10/18 $5,793,943 $5,226,385 11/18 $6,106,004 $5,441,763 12/18 $5,955,690 $5,297,604 1/19 $6,447,258 $5,761,449 2/19 $6,496,009 $5,774,402 3/19 $6,626,010 $5,822,866 4/19 $6,825,075 $5,945,448 5/19 $6,260,381 $5,514,038 6/19 $6,719,449 $5,858,175 7/19 $6,638,198 $5,786,542 8/19 $6,414,758 $5,504,409 9/19 $6,577,260 $5,609,487 10/19 $6,853,513 $5,846,021 11/19 $6,877,888 $5,837,977 12/19 $7,314,394 $6,273,521 1/20 $6,933,521 $5,981,083 2/20 $6,650,938 $5,665,682 3/20 $5,586,133 $4,793,038 4/20 $6,065,295 $5,231,955 5/20 $6,159,489 $5,272,140 6/20 $6,732,846 $5,659,690 7/20 $7,384,016 $6,165,450 8/20 $7,687,076 $6,301,735 9/20 $7,572,404 $6,200,659 10/20 $7,822,224 $6,328,411 11/20 $8,518,443 $6,913,710 12/20 $9,138,979 $7,421,961 1/21 $9,320,030 $7,649,502 2/21 $9,480,507 $7,708,010 3/21 $9,361,178 $7,591,599 4/21 $9,369,408 $7,780,613 5/21 $9,521,655 $7,961,048 6/21 $9,496,966 $7,974,768 7/21 $9,011,420 $7,438,079 8/21 $9,147,208 $7,632,772 9/21 $8,715,154 $7,329,441 10/21 $8,805,679 $7,401,730 11/21 $8,406,543 $7,100,085 12/21 $8,464,847 $7,233,308 1/22 $8,410,878 $7,096,388 2/22 $7,941,762 $6,884,276 3/22 $7,688,523 $6,728,790 4/22 $7,057,499 $6,354,492 5/22 $7,045,045 $6,382,470 6/22 $6,542,717 $5,958,357 7/22 $6,737,836 $5,943,720 8/22 $6,733,684 $5,968,534 9/22 $5,965,662 $5,268,829 10/22 $5,853,573 $5,105,241 11/22 $6,804,259 $5,862,438 12/22 $6,562,737 $5,780,038 1/23 $7,245,395 $6,236,438 2/23 $6,642,311 $5,832,053 3/23 $6,855,903 $6,008,690 4/23 $6,755,389 $5,940,595 5/23 $6,558,549 $5,840,815 6/23 $6,834,963 $6,062,590 7/23 $7,178,386 $6,439,995 8/23 $6,696,756 $6,043,290 9/23 $6,416,154 $5,885,244 10/23 $6,210,937 $5,656,574 11/23 $6,663,251 $6,109,270 12/23 $6,878,060 $6,348,107 1/24 $6,552,146 $6,053,342 2/24 $6,806,105 $6,341,314 3/24 $7,017,738 $6,498,449 4/24 $7,013,505 $6,527,525 5/24 $7,144,717 $6,564,394 6/24 $7,394,444 $6,823,317 7/24 $7,432,538 $6,843,623 8/24 $7,441,003 $6,954,117 9/24 $7,931,991 $7,418,478 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class R6 23.63% 3.81% 4.72% MSCI Emerging Markets Index (net of foreign withholding taxes) 26.05% 5.74% 4.02% | |
Material Change Date | | Sep. 30, 2023 |
AssetsNet | $ 1,486,454,881 | |
Holdings Count | Holding | 61 | |
Advisory Fees Paid, Amount | $ 11,919,013 | |
InvestmentCompanyPortfolioTurnover | 36% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,486,454,881 # of Portfolio Holdings 61 Portfolio Turnover Rate 36% Total Advisory Fees Paid $11,919,013 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 11.3% Canada 2.2% Singapore 2.5% Hungary 3.1% Hong Kong 4.7% Brazil 5.1% South Africa 5.4% South Korea 10.8% India 14.9% Taiwan 15.9% China 24.1% Top Ten Holdings (% of total investments) Footnote Reference Taiwan Semiconductor Manufacturing Co. Ltd. 9.1% Tencent Holdings Ltd. 5.9% Samsung Electronics Co. Ltd. 5.4% HDFC Bank Ltd. 3.1% Richter Gedeon Nyrt 3.1% Itausa SA, PFC Shares 2.9% ICICI Bank Ltd. 2.9% Infosys Ltd. 2.8% KB Financial Group, Inc. 2.4% NARI Technology Co. Ltd., Class A 2.3% Total 39.9% 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, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Material Fund Change Risks Change [Text Block] | In September 2024, the Fund's Board of Directors approved the termination of the investment sub-advisory agreement between Calvert Research and Management (CRM) and Hermes Investment Management Limited, which is expected to be effective November 11, 2024. CRM will continue to serve as the Fund's investment adviser. Effective November 11, 2024, the Fund revised its responsible investing criteria to follow the Calvert Principles for Responsible Investment. | |
Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by February 1, 2025 at www.eatonvance.com/calvert-fund-documents.php | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000023776 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Equity Fund | |
Class Name | Class A | |
Trading Symbol | CWVGX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B187"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $129 1.14% | |
Expenses Paid, Amount | $ 129 | |
Expense Ratio, Percent | 1.14% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE Index (the Index): ↑ Recruit Holdings Co., a Japanese information technology recruiter, contributed to returns as fears of a recession receded and employment trends were strong ↑ Taiwan Semiconductor Manufacturing Co. helped returns as demand for its high-end semiconductors surged during a rise in artificial intelligence applications ↑ Safran SA, a French aeroengine maker, aided returns as air travel continued to recover and weak new aircraft production drove demand for spare parts and service ↑ Schneider Electric SE, a French maker of power distribution equipment, aided returns as electrical grid and data center demand boomed during the period ↓ Nestle SA, a consumer staples company, detracted from Index-relative returns as high inflation weakened consumer buying power during the period ↓ Reckitt Benckiser Group, a U.K. consumer staples company, hampered returns as U.S. litigation involving its baby formula business worried investors ↓ Sartorius AG, a German life sciences equipment supplier, hampered performance amid a downturn in demand for its products following the COVID pandemic ↓ Kose Corp., a Japanese cosmetics maker, hurt returns amid weak Chinese sales and fears that tainted water was used in production. Kose was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class A with Maximum Sales Charge MSCI EAFE Index 9/14 $9,475 $10,000 10/14 $9,498 $9,855 11/14 $9,515 $9,989 12/14 $9,189 $9,643 1/15 $9,293 $9,690 2/15 $9,813 $10,269 3/15 $9,622 $10,113 4/15 $10,015 $10,526 5/15 $10,009 $10,472 6/15 $9,813 $10,176 7/15 $10,038 $10,387 8/15 $9,345 $9,623 9/15 $9,022 $9,134 10/15 $9,582 $9,848 11/15 $9,362 $9,695 12/15 $9,165 $9,564 1/16 $8,670 $8,873 2/16 $8,344 $8,710 3/16 $8,845 $9,277 4/16 $8,996 $9,545 5/16 $8,990 $9,459 6/16 $8,536 $9,141 7/16 $8,874 $9,605 8/16 $8,885 $9,611 9/16 $9,025 $9,729 10/16 $8,839 $9,530 11/16 $8,594 $9,341 12/16 $8,813 $9,660 1/17 $8,998 $9,940 2/17 $9,034 $10,082 3/17 $9,334 $10,360 4/17 $9,669 $10,623 5/17 $9,891 $11,013 6/17 $9,891 $10,994 7/17 $10,130 $11,311 8/17 $10,052 $11,307 9/17 $10,238 $11,588 10/17 $10,382 $11,764 11/17 $10,508 $11,887 12/17 $10,686 $12,078 1/18 $11,117 $12,684 2/18 $10,649 $12,112 3/18 $10,686 $11,893 4/18 $10,698 $12,165 5/18 $10,631 $11,891 6/18 $10,437 $11,746 7/18 $10,674 $12,035 8/18 $10,613 $11,803 9/18 $10,649 $11,905 10/18 $9,702 $10,958 11/18 $9,963 $10,944 12/18 $9,459 $10,413 1/19 $9,902 $11,097 2/19 $10,326 $11,380 3/19 $10,572 $11,452 4/19 $10,978 $11,774 5/19 $10,486 $11,208 6/19 $11,236 $11,873 7/19 $11,101 $11,722 8/19 $10,978 $11,419 9/19 $11,174 $11,746 10/19 $11,611 $12,168 11/19 $11,875 $12,305 12/19 $12,363 $12,705 1/20 $12,214 $12,440 2/20 $11,581 $11,315 3/20 $10,129 $9,805 4/20 $10,737 $10,438 5/20 $11,463 $10,893 6/20 $11,916 $11,264 7/20 $12,183 $11,526 8/20 $12,785 $12,119 9/20 $12,630 $11,804 10/20 $12,121 $11,333 11/20 $13,858 $13,089 12/20 $14,545 $13,698 1/21 $14,302 $13,552 2/21 $14,569 $13,856 3/21 $14,731 $14,175 4/21 $15,297 $14,601 5/21 $15,937 $15,077 6/21 $15,664 $14,908 7/21 $15,918 $15,020 8/21 $16,267 $15,285 9/21 $15,583 $14,841 10/21 $16,323 $15,206 11/21 $15,564 $14,498 12/21 $16,290 $15,241 1/22 $15,208 $14,504 2/22 $14,657 $14,248 3/22 $14,670 $14,339 4/22 $13,734 $13,412 5/22 $13,767 $13,512 6/22 $12,626 $12,259 7/22 $13,555 $12,869 8/22 $12,466 $12,258 9/22 $11,331 $11,111 10/22 $11,995 $11,709 11/22 $13,502 $13,028 12/22 $13,164 $13,038 1/23 $14,279 $14,094 2/23 $13,885 $13,800 3/23 $14,470 $14,142 4/23 $14,857 $14,541 5/23 $14,504 $13,926 6/23 $15,007 $14,560 7/23 $15,156 $15,031 8/23 $14,306 $14,455 9/23 $13,477 $13,961 10/23 $12,899 $13,395 11/23 $14,157 $14,638 12/23 $15,183 $15,416 1/24 $14,957 $15,505 2/24 $15,197 $15,789 3/24 $15,636 $16,308 4/24 $15,245 $15,890 5/24 $16,006 $16,506 6/24 $15,759 $16,239 7/24 $16,081 $16,716 8/24 $16,774 $17,259 9/24 $16,998 $17,419 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class A 26.09% 8.74% 6.01% Class A with 5.25% Maximum Sales Charge 19.46% 7.57% 5.44% MSCI EAFE Index (net of foreign withholding taxes) 24.77% 8.19% 5.70% | |
AssetsNet | $ 1,112,704,495 | |
Holdings Count | Holding | 48 | |
Advisory Fees Paid, Amount | $ 6,150,824 | |
InvestmentCompanyPortfolioTurnover | 23% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,112,704,495 # of Portfolio Holdings 48 Portfolio Turnover Rate 23% Total Advisory Fees Paid $6,150,824 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 13.4% Hong Kong 3.3% United States 3.4% Denmark 5.0% Netherlands 7.0% Germany 7.2% Switzerland 8.2% Japan 8.4% Spain 8.8% France 12.9% United Kingdom 22.4% Top Ten Holdings (% of total investments) Footnote Reference Nestle SA 4.9% ASML Holding NV 3.9% Iberdrola SA 3.7% AstraZeneca PLC 3.7% Siemens AG 3.5% Compass Group PLC 3.4% AIA Group Ltd. 3.3% Novo Nordisk AS, Class B 3.3% IMCD NV 3.1% Reckitt Benckiser Group PLC 3.1% Total 35.9% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000023778 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Equity Fund | |
Class Name | Class C | |
Trading Symbol | CWVCX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B212"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 C $213 1.89% | |
Expenses Paid, Amount | $ 213 | |
Expense Ratio, Percent | 1.89% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE Index (the Index): ↑ Recruit Holdings Co., a Japanese information technology recruiter, contributed to returns as fears of a recession receded and employment trends were strong ↑ Taiwan Semiconductor Manufacturing Co. helped returns as demand for its high-end semiconductors surged during a rise in artificial intelligence applications ↑ Safran SA, a French aeroengine maker, aided returns as air travel continued to recover and weak new aircraft production drove demand for spare parts and service ↑ Schneider Electric SE, a French maker of power distribution equipment, aided returns as electrical grid and data center demand boomed during the period ↓ Nestle SA, a consumer staples company, detracted from Index-relative returns as high inflation weakened consumer buying power during the period ↓ Reckitt Benckiser Group, a U.K. consumer staples company, hampered returns as U.S. litigation involving its baby formula business worried investors ↓ Sartorius AG, a German life sciences equipment supplier, hampered performance amid a downturn in demand for its products following the COVID pandemic ↓ Kose Corp., a Japanese cosmetics maker, hurt returns amid weak Chinese sales and fears that tainted water was used in production. Kose was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class C MSCI EAFE Index 9/14 $10,000 $10,000 10/14 $10,007 $9,855 11/14 $10,028 $9,989 12/14 $9,671 $9,643 1/15 $9,769 $9,690 2/15 $10,315 $10,269 3/15 $10,105 $10,113 4/15 $10,511 $10,526 5/15 $10,497 $10,472 6/15 $10,287 $10,176 7/15 $10,511 $10,387 8/15 $9,783 $9,623 9/15 $9,433 $9,134 10/15 $10,014 $9,848 11/15 $9,783 $9,695 12/15 $9,573 $9,564 1/16 $9,045 $8,873 2/16 $8,700 $8,710 3/16 $9,214 $9,277 4/16 $9,369 $9,545 5/16 $9,354 $9,459 6/16 $8,876 $9,141 7/16 $9,228 $9,605 8/16 $9,228 $9,611 9/16 $9,369 $9,729 10/16 $9,171 $9,530 11/16 $8,911 $9,341 12/16 $9,127 $9,660 1/17 $9,313 $9,940 2/17 $9,349 $10,082 3/17 $9,651 $10,360 4/17 $9,996 $10,623 5/17 $10,219 $11,013 6/17 $10,212 $10,994 7/17 $10,449 $11,311 8/17 $10,363 $11,307 9/17 $10,549 $11,588 10/17 $10,686 $11,764 11/17 $10,815 $11,887 12/17 $10,991 $12,078 1/18 $11,427 $12,684 2/18 $10,941 $12,112 3/18 $10,970 $11,893 4/18 $10,970 $12,165 5/18 $10,904 $11,891 6/18 $10,694 $11,746 7/18 $10,926 $12,035 8/18 $10,861 $11,803 9/18 $10,890 $11,905 10/18 $9,917 $10,958 11/18 $10,178 $10,944 12/18 $9,656 $10,413 1/19 $10,101 $11,097 2/19 $10,532 $11,380 3/19 $10,773 $11,452 4/19 $11,174 $11,774 5/19 $10,671 $11,208 6/19 $11,422 $11,873 7/19 $11,284 $11,722 8/19 $11,152 $11,419 9/19 $11,342 $11,746 10/19 $11,780 $12,168 11/19 $12,035 $12,305 12/19 $12,524 $12,705 1/20 $12,363 $12,440 2/20 $11,719 $11,315 3/20 $10,239 $9,805 4/20 $10,847 $10,438 5/20 $11,580 $10,893 6/20 $12,026 $11,264 7/20 $12,283 $11,526 8/20 $12,883 $12,119 9/20 $12,722 $11,804 10/20 $12,202 $11,333 11/20 $13,945 $13,089 12/20 $14,626 $13,698 1/21 $14,370 $13,552 2/21 $14,626 $13,856 3/21 $14,787 $14,175 4/21 $15,344 $14,601 5/21 $15,974 $15,077 6/21 $15,696 $14,908 7/21 $15,937 $15,020 8/21 $16,274 $15,285 9/21 $15,586 $14,841 10/21 $16,311 $15,206 11/21 $15,542 $14,498 12/21 $16,259 $15,241 1/22 $15,167 $14,504 2/22 $14,617 $14,248 3/22 $14,609 $14,339 4/22 $13,674 $13,412 5/22 $13,698 $13,512 6/22 $12,550 $12,259 7/22 $13,470 $12,869 8/22 $12,377 $12,258 9/22 $11,246 $11,111 10/22 $11,898 $11,709 11/22 $13,383 $13,028 12/22 $13,043 $13,038 1/23 $14,134 $14,094 2/23 $13,741 $13,800 3/23 $14,310 $14,142 4/23 $14,679 $14,541 5/23 $14,326 $13,926 6/23 $14,816 $14,560 7/23 $14,944 $15,031 8/23 $14,102 $14,455 9/23 $13,275 $13,961 10/23 $12,698 $13,395 11/23 $13,925 $14,638 12/23 $14,923 $15,416 1/24 $14,698 $15,505 2/24 $14,923 $15,789 3/24 $15,341 $16,308 4/24 $14,947 $15,890 5/24 $15,687 $16,506 6/24 $15,430 $16,239 7/24 $15,743 $16,716 8/24 $16,403 $17,259 9/24 $16,865 $17,419 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class C 25.14% 7.92% 5.36% Class C with 1% Maximum Deferred Sales Charge 24.14% 7.92% 5.36% MSCI EAFE Index (net of foreign withholding taxes) 24.77% 8.19% 5.70% | |
AssetsNet | $ 1,112,704,495 | |
Holdings Count | Holding | 48 | |
Advisory Fees Paid, Amount | $ 6,150,824 | |
InvestmentCompanyPortfolioTurnover | 23% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,112,704,495 # of Portfolio Holdings 48 Portfolio Turnover Rate 23% Total Advisory Fees Paid $6,150,824 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 13.4% Hong Kong 3.3% United States 3.4% Denmark 5.0% Netherlands 7.0% Germany 7.2% Switzerland 8.2% Japan 8.4% Spain 8.8% France 12.9% United Kingdom 22.4% Top Ten Holdings (% of total investments) Footnote Reference Nestle SA 4.9% ASML Holding NV 3.9% Iberdrola SA 3.7% AstraZeneca PLC 3.7% Siemens AG 3.5% Compass Group PLC 3.4% AIA Group Ltd. 3.3% Novo Nordisk AS, Class B 3.3% IMCD NV 3.1% Reckitt Benckiser Group PLC 3.1% Total 35.9% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000023779 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Equity Fund | |
Class Name | Class I | |
Trading Symbol | CWVIX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B237"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $101 0.89% | |
Expenses Paid, Amount | $ 101 | |
Expense Ratio, Percent | 0.89% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE Index (the Index): ↑ Recruit Holdings Co., a Japanese information technology recruiter, contributed to returns as fears of a recession receded and employment trends were strong ↑ Taiwan Semiconductor Manufacturing Co. helped returns as demand for its high-end semiconductors surged during a rise in artificial intelligence applications ↑ Safran SA, a French aeroengine maker, aided returns as air travel continued to recover and weak new aircraft production drove demand for spare parts and service ↑ Schneider Electric SE, a French maker of power distribution equipment, aided returns as electrical grid and data center demand boomed during the period ↓ Nestle SA, a consumer staples company, detracted from Index-relative returns as high inflation weakened consumer buying power during the period ↓ Reckitt Benckiser Group, a U.K. consumer staples company, hampered returns as U.S. litigation involving its baby formula business worried investors ↓ Sartorius AG, a German life sciences equipment supplier, hampered performance amid a downturn in demand for its products following the COVID pandemic ↓ Kose Corp., a Japanese cosmetics maker, hurt returns amid weak Chinese sales and fears that tainted water was used in production. Kose was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class I MSCI EAFE Index 9/14 $1,000,000 $1,000,000 10/14 $1,002,827 $985,480 11/14 $1,005,662 $998,885 12/14 $971,667 $964,282 1/15 $983,115 $968,996 2/15 $1,038,618 $1,026,923 3/15 $1,019,154 $1,011,323 4/15 $1,060,923 $1,052,614 5/15 $1,060,343 $1,047,226 6/15 $1,040,323 $1,017,555 7/15 $1,064,367 $1,038,682 8/15 $991,112 $962,274 9/15 $957,355 $913,414 10/15 $1,016,870 $984,815 11/15 $994,559 $969,494 12/15 $974,027 $956,431 1/16 $921,102 $887,268 2/16 $886,789 $871,012 3/16 $940,291 $927,687 4/16 $957,156 $954,545 5/16 $956,569 $945,873 6/16 $908,300 $914,123 7/16 $944,927 $960,451 8/16 $946,665 $961,133 9/16 $961,782 $972,940 10/16 $942,586 $953,039 11/16 $916,414 $934,058 12/16 $939,866 $965,997 1/17 $960,289 $994,019 2/17 $963,891 $1,008,233 3/17 $996,316 $1,035,988 4/17 $1,032,945 $1,062,349 5/17 $1,056,375 $1,101,341 6/17 $1,056,966 $1,099,393 7/17 $1,082,787 $1,131,106 8/17 $1,074,977 $1,130,680 9/17 $1,095,397 $1,158,812 10/17 $1,110,420 $1,176,408 11/17 $1,124,827 $1,188,748 12/17 $1,143,888 $1,207,828 1/18 $1,190,296 $1,268,412 2/18 $1,140,820 $1,211,161 3/18 $1,145,091 $1,189,332 4/18 $1,146,305 $1,216,487 5/18 $1,140,209 $1,189,143 6/18 $1,119,447 $1,174,615 7/18 $1,145,089 $1,203,529 8/18 $1,138,975 $1,180,286 9/18 $1,143,244 $1,190,529 10/18 $1,042,481 $1,095,772 11/18 $1,070,568 $1,094,392 12/18 $1,016,841 $1,041,266 1/19 $1,064,519 $1,109,698 2/19 $1,110,338 $1,137,985 3/19 $1,136,957 $1,145,161 4/19 $1,180,300 $1,177,358 5/19 $1,128,285 $1,120,814 6/19 $1,209,413 $1,187,307 7/19 $1,195,164 $1,172,232 8/19 $1,182,149 $1,141,864 9/19 $1,203,193 $1,174,585 10/19 $1,250,880 $1,216,787 11/19 $1,278,747 $1,230,504 12/19 $1,332,668 $1,270,495 1/20 $1,316,372 $1,243,957 2/20 $1,248,117 $1,131,507 3/20 $1,091,563 $980,486 4/20 $1,157,313 $1,043,828 5/20 $1,236,857 $1,089,282 6/20 $1,285,707 $1,126,371 7/20 $1,314,510 $1,152,626 8/20 $1,379,648 $1,211,883 9/20 $1,363,376 $1,180,394 10/20 $1,308,897 $1,133,263 11/20 $1,496,781 $1,308,934 12/20 $1,571,440 $1,369,794 1/21 $1,545,658 $1,355,200 2/21 $1,574,565 $1,385,596 3/21 $1,592,797 $1,417,456 4/21 $1,653,797 $1,460,106 5/21 $1,723,605 $1,507,722 6/21 $1,694,677 $1,490,754 7/21 $1,722,357 $1,501,979 8/21 $1,760,716 $1,528,472 9/21 $1,687,143 $1,484,115 10/21 $1,767,004 $1,520,617 11/21 $1,685,885 $1,449,842 12/21 $1,764,489 $1,524,079 1/22 $1,647,258 $1,450,430 2/22 $1,588,308 $1,424,784 3/22 $1,589,648 $1,433,942 4/22 $1,488,494 $1,341,173 5/22 $1,492,514 $1,351,228 6/22 $1,369,254 $1,225,851 7/22 $1,470,407 $1,286,935 8/22 $1,352,507 $1,225,812 9/22 $1,229,247 $1,111,141 10/22 $1,301,595 $1,170,892 11/22 $1,466,388 $1,302,777 12/22 $1,429,709 $1,303,824 1/23 $1,550,568 $1,409,404 2/23 $1,508,679 $1,379,994 3/23 $1,572,542 $1,414,196 4/23 $1,614,431 $1,454,123 5/23 $1,576,662 $1,392,587 6/23 $1,631,598 $1,455,963 7/23 $1,648,079 $1,503,073 8/23 $1,556,061 $1,445,487 9/23 $1,466,104 $1,396,112 10/23 $1,403,614 $1,339,511 11/23 $1,540,954 $1,463,842 12/23 $1,652,172 $1,541,614 1/24 $1,628,600 $1,550,486 2/24 $1,654,946 $1,578,867 3/24 $1,702,784 $1,630,795 4/24 $1,660,492 $1,589,032 5/24 $1,744,383 $1,650,584 6/24 $1,717,344 $1,623,937 7/24 $1,753,396 $1,671,578 8/24 $1,828,275 $1,725,931 9/24 $1,853,393 $1,741,869 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class I 26.41% 9.01% 6.36% MSCI EAFE Index (net of foreign withholding taxes) 24.77% 8.19% 5.70% | |
AssetsNet | $ 1,112,704,495 | |
Holdings Count | Holding | 48 | |
Advisory Fees Paid, Amount | $ 6,150,824 | |
InvestmentCompanyPortfolioTurnover | 23% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,112,704,495 # of Portfolio Holdings 48 Portfolio Turnover Rate 23% Total Advisory Fees Paid $6,150,824 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 13.4% Hong Kong 3.3% United States 3.4% Denmark 5.0% Netherlands 7.0% Germany 7.2% Switzerland 8.2% Japan 8.4% Spain 8.8% France 12.9% United Kingdom 22.4% Top Ten Holdings (% of total investments) Footnote Reference Nestle SA 4.9% ASML Holding NV 3.9% Iberdrola SA 3.7% AstraZeneca PLC 3.7% Siemens AG 3.5% Compass Group PLC 3.4% AIA Group Ltd. 3.3% Novo Nordisk AS, Class B 3.3% IMCD NV 3.1% Reckitt Benckiser Group PLC 3.1% Total 35.9% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000211925 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Equity Fund | |
Class Name | Class R6 | |
Trading Symbol | CIESX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Equity Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B262"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 R6 $96 0.85% | |
Expenses Paid, Amount | $ 96 | |
Expense Ratio, Percent | 0.85% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE Index (the Index): ↑ Recruit Holdings Co., a Japanese information technology recruiter, contributed to returns as fears of a recession receded and employment trends were strong ↑ Taiwan Semiconductor Manufacturing Co. helped returns as demand for its high-end semiconductors surged during a rise in artificial intelligence applications ↑ Safran SA, a French aeroengine maker, aided returns as air travel continued to recover and weak new aircraft production drove demand for spare parts and service ↑ Schneider Electric SE, a French maker of power distribution equipment, aided returns as electrical grid and data center demand boomed during the period ↓ Nestle SA, a consumer staples company, detracted from Index-relative returns as high inflation weakened consumer buying power during the period ↓ Reckitt Benckiser Group, a U.K. consumer staples company, hampered returns as U.S. litigation involving its baby formula business worried investors ↓ Sartorius AG, a German life sciences equipment supplier, hampered performance amid a downturn in demand for its products following the COVID pandemic ↓ Kose Corp., a Japanese cosmetics maker, hurt returns amid weak Chinese sales and fears that tainted water was used in production. Kose was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class R6 MSCI EAFE Index 9/14 $5,000,000 $5,000,000 10/14 $5,014,140 $4,927,402 11/14 $5,028,281 $4,994,423 12/14 $4,858,272 $4,821,409 1/15 $4,915,495 $4,844,979 2/15 $5,193,029 $5,134,616 3/15 $5,095,749 $5,056,615 4/15 $5,304,615 $5,263,072 5/15 $5,301,754 $5,236,131 6/15 $5,201,613 $5,087,773 7/15 $5,321,782 $5,193,412 8/15 $4,955,552 $4,811,369 9/15 $4,786,743 $4,567,069 10/15 $5,084,305 $4,924,074 11/15 $4,972,719 $4,847,471 12/15 $4,870,103 $4,782,156 1/16 $4,605,518 $4,436,339 2/16 $4,433,974 $4,355,062 3/16 $4,701,466 $4,638,435 4/16 $4,785,785 $4,772,723 5/16 $4,782,877 $4,729,366 6/16 $4,541,553 $4,570,613 7/16 $4,724,727 $4,802,255 8/16 $4,733,449 $4,805,665 9/16 $4,809,045 $4,864,699 10/16 $4,713,097 $4,765,193 11/16 $4,582,258 $4,670,289 12/16 $4,699,492 $4,829,987 1/17 $4,801,590 $4,970,093 2/17 $4,819,607 $5,041,163 3/17 $4,981,762 $5,179,940 4/17 $5,164,937 $5,311,743 5/17 $5,282,049 $5,506,705 6/17 $5,285,052 $5,496,966 7/17 $5,414,175 $5,655,530 8/17 $5,375,138 $5,653,399 9/17 $5,477,236 $5,794,059 10/17 $5,552,307 $5,882,040 11/17 $5,624,376 $5,943,738 12/17 $5,719,678 $6,039,142 1/18 $5,951,763 $6,342,062 2/18 $5,704,409 $6,055,807 3/18 $5,725,786 $5,946,659 4/18 $5,731,893 $6,082,437 5/18 $5,701,356 $5,945,716 6/18 $5,597,528 $5,873,076 7/18 $5,725,786 $6,017,644 8/18 $5,695,248 $5,901,428 9/18 $5,716,624 $5,952,645 10/18 $5,212,755 $5,478,862 11/18 $5,353,228 $5,471,958 12/18 $5,084,622 $5,206,328 1/19 $5,323,060 $5,548,489 2/19 $5,552,209 $5,689,927 3/19 $5,685,363 $5,725,806 4/19 $5,905,222 $5,886,789 5/19 $5,642,010 $5,604,071 6/19 $6,047,665 $5,936,535 7/19 $5,976,443 $5,861,160 8/19 $5,911,415 $5,709,321 9/19 $6,019,796 $5,872,927 10/19 $6,255,138 $6,083,936 11/19 $6,397,581 $6,152,522 12/19 $6,666,271 $6,352,477 1/20 $6,584,746 $6,219,787 2/20 $6,246,102 $5,657,533 3/20 $5,462,203 $4,902,432 4/20 $5,791,441 $5,219,142 5/20 $6,189,661 $5,446,408 6/20 $6,434,237 $5,631,856 7/20 $6,578,475 $5,763,129 8/20 $6,904,576 $6,059,416 9/20 $6,823,051 $5,901,972 10/20 $6,550,254 $5,666,313 11/20 $7,490,932 $6,544,668 12/20 $7,866,260 $6,848,969 1/21 $7,737,047 $6,776,000 2/21 $7,878,866 $6,927,981 3/21 $7,970,261 $7,087,278 4/21 $8,279,113 $7,300,531 5/21 $8,628,934 $7,538,608 6/21 $8,483,963 $7,453,770 7/21 $8,622,631 $7,509,893 8/21 $8,814,876 $7,642,362 9/21 $8,446,145 $7,420,573 10/21 $8,849,543 $7,603,085 11/21 $8,439,842 $7,249,209 12/21 $8,833,901 $7,620,396 1/22 $8,249,231 $7,252,149 2/22 $7,953,535 $7,123,920 3/22 $7,960,256 $7,169,709 4/22 $7,452,869 $6,705,866 5/22 $7,476,390 $6,756,139 6/22 $6,854,758 $6,129,253 7/22 $7,365,505 $6,434,673 8/22 $6,770,753 $6,129,061 9/22 $6,159,202 $5,555,706 10/22 $6,518,740 $5,854,462 11/22 $7,341,983 $6,513,884 12/22 $7,160,170 $6,519,118 1/23 $7,766,905 $7,047,018 2/23 $7,556,616 $6,899,971 3/23 $7,877,221 $7,070,980 4/23 $8,087,510 $7,270,614 5/23 $7,897,905 $6,962,935 6/23 $8,173,694 $7,279,815 7/23 $8,256,431 $7,515,365 8/23 $7,794,484 $7,227,433 9/23 $7,346,327 $6,980,561 10/23 $7,032,617 $6,697,556 11/23 $7,718,642 $7,319,209 12/23 $8,279,948 $7,708,071 1/24 $8,161,514 $7,752,430 2/24 $8,290,398 $7,894,334 3/24 $8,530,750 $8,153,976 4/24 $8,321,749 $7,945,162 5/24 $8,739,752 $8,252,918 6/24 $8,607,384 $8,119,684 7/24 $8,785,036 $8,357,888 8/24 $9,164,722 $8,629,654 9/24 $9,290,123 $8,709,344 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class R6 26.46% 9.06% 6.39% MSCI EAFE Index (net of foreign withholding taxes) 24.77% 8.19% 5.70% | |
AssetsNet | $ 1,112,704,495 | |
Holdings Count | Holding | 48 | |
Advisory Fees Paid, Amount | $ 6,150,824 | |
InvestmentCompanyPortfolioTurnover | 23% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,112,704,495 # of Portfolio Holdings 48 Portfolio Turnover Rate 23% Total Advisory Fees Paid $6,150,824 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 13.4% Hong Kong 3.3% United States 3.4% Denmark 5.0% Netherlands 7.0% Germany 7.2% Switzerland 8.2% Japan 8.4% Spain 8.8% France 12.9% United Kingdom 22.4% Top Ten Holdings (% of total investments) Footnote Reference Nestle SA 4.9% ASML Holding NV 3.9% Iberdrola SA 3.7% AstraZeneca PLC 3.7% Siemens AG 3.5% Compass Group PLC 3.4% AIA Group Ltd. 3.3% Novo Nordisk AS, Class B 3.3% IMCD NV 3.1% Reckitt Benckiser Group PLC 3.1% Total 35.9% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000047589 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Opportunities Fund | |
Class Name | Class A | |
Trading Symbol | CIOAX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Opportunities Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B287"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $149 1.33% | |
Expenses Paid, Amount | $ 149 | |
Expense Ratio, Percent | 1.33% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE SMID Cap Index (the Index): ↑ Zegona Communications PLC contributed to Index-relative returns after completing its acquisition of Vodafone Spain and restructuring its business operations ↑ Addtech AB, a Swedish industrial products group, helped returns on robust growth, profit generation, astute acquisitions, and a favorable market outlook ↑ Sanwa Holdings Corp., a Japanese building materials company, aided Fund performance as domestic demand was strong and price increases led to growth ↑ Volution Group PLC, a U.K.-based ventilation products firm, helped returns as profits rose on the strength of its renovations market and business acquisitions ↓ ATS Corp., a Canadian manufacturer of factory automation systems, detracted from Index-relative performance as its backlog of business declined ↓ SUMCO Corp., a Tokyo-based silicon wafer maker, hampered returns on lower-than-expected earnings due to slowing demand and adjustments to customer inventory ↓ Dip Corp., a Japanese online job-board operator, detracted from returns amid weak demand for job seekers by restaurants and manufacturers that hindered sales ↓ Spark New Zealand Ltd., a New Zealand-based telecommunications company, hampered returns as weak demand for IT services led to lower-than-expected earnings | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class A with Maximum Sales Charge MSCI EAFE Index MSCI EAFE SMID Cap Index 9/14 $9,475 $10,000 $10,000 10/14 $9,371 $9,855 $9,864 11/14 $9,319 $9,989 $9,982 12/14 $9,147 $9,643 $9,876 1/15 $9,165 $9,690 $9,954 2/15 $9,713 $10,269 $10,574 3/15 $9,682 $10,113 $10,426 4/15 $10,073 $10,526 $10,867 5/15 $10,154 $10,472 $10,932 6/15 $9,924 $10,176 $10,720 7/15 $9,868 $10,387 $10,882 8/15 $9,284 $9,623 $10,305 9/15 $9,066 $9,134 $9,918 10/15 $9,545 $9,848 $10,588 11/15 $9,402 $9,695 $10,545 12/15 $9,311 $9,564 $10,529 1/16 $8,690 $8,873 $9,746 2/16 $8,612 $8,710 $9,702 3/16 $9,337 $9,277 $10,457 4/16 $9,453 $9,545 $10,700 5/16 $9,550 $9,459 $10,659 6/16 $8,877 $9,141 $10,147 7/16 $9,291 $9,605 $10,768 8/16 $9,427 $9,611 $10,718 9/16 $9,563 $9,729 $10,958 10/16 $9,401 $9,530 $10,634 11/16 $9,201 $9,341 $10,377 12/16 $9,372 $9,660 $10,668 1/17 $9,647 $9,940 $11,061 2/17 $9,850 $10,082 $11,267 3/17 $10,196 $10,360 $11,506 4/17 $10,746 $10,623 $11,941 5/17 $11,223 $11,013 $12,389 6/17 $11,282 $10,994 $12,384 7/17 $11,772 $11,311 $12,802 8/17 $11,812 $11,307 $12,889 9/17 $12,230 $11,588 $13,214 10/17 $12,381 $11,764 $13,463 11/17 $12,715 $11,887 $13,628 12/17 $12,925 $12,078 $13,952 1/18 $13,706 $12,684 $14,638 2/18 $13,169 $12,112 $14,073 3/18 $13,204 $11,893 $13,860 4/18 $13,281 $12,165 $14,092 5/18 $13,267 $11,891 $13,954 6/18 $13,002 $11,746 $13,694 7/18 $13,162 $12,035 $13,873 8/18 $13,099 $11,803 $13,769 9/18 $13,162 $11,905 $13,716 10/18 $11,815 $10,958 $12,411 11/18 $11,763 $10,944 $12,297 12/18 $11,012 $10,413 $11,587 1/19 $11,756 $11,097 $12,490 2/19 $12,059 $11,380 $12,770 3/19 $12,150 $11,452 $12,801 4/19 $12,514 $11,774 $13,185 5/19 $11,854 $11,208 $12,478 6/19 $12,522 $11,873 $13,110 7/19 $12,188 $11,722 $12,990 8/19 $11,991 $11,419 $12,689 9/19 $12,272 $11,746 $13,044 10/19 $12,711 $12,168 $13,628 11/19 $13,242 $12,305 $13,905 12/19 $13,853 $12,705 $14,411 1/20 $13,492 $12,440 $14,046 2/20 $12,418 $11,315 $12,711 3/20 $10,286 $9,805 $10,609 4/20 $11,329 $10,438 $11,611 5/20 $12,349 $10,893 $12,378 6/20 $12,503 $11,264 $12,615 7/20 $12,963 $11,526 $12,989 8/20 $13,738 $12,119 $13,914 9/20 $13,815 $11,804 $13,729 10/20 $13,401 $11,333 $13,272 11/20 $14,758 $13,089 $15,166 12/20 $15,755 $13,698 $16,045 1/21 $15,447 $13,552 $15,977 2/21 $15,609 $13,856 $16,256 3/21 $15,987 $14,175 $16,617 4/21 $16,866 $14,601 $17,209 5/21 $17,282 $15,077 $17,588 6/21 $16,989 $14,908 $17,347 7/21 $17,676 $15,020 $17,581 8/21 $18,200 $15,285 $17,993 9/21 $17,383 $14,841 $17,352 10/21 $17,961 $15,206 $17,623 11/21 $17,121 $14,498 $16,740 12/21 $17,898 $15,241 $17,450 1/22 $16,232 $14,504 $16,160 2/22 $15,635 $14,248 $15,973 3/22 $15,112 $14,339 $15,959 4/22 $13,877 $13,412 $14,850 5/22 $13,803 $13,512 $14,780 6/22 $12,302 $12,259 $13,243 7/22 $13,562 $12,869 $14,057 8/22 $12,435 $12,258 $13,409 9/22 $11,241 $11,111 $11,902 10/22 $11,780 $11,709 $12,460 11/22 $13,355 $13,028 $13,730 12/22 $13,091 $13,038 $13,817 1/23 $14,031 $14,094 $14,936 2/23 $13,615 $13,800 $14,627 3/23 $13,723 $14,142 $14,700 4/23 $14,048 $14,541 $15,026 5/23 $13,565 $13,926 $14,379 6/23 $13,948 $14,560 $14,788 7/23 $14,389 $15,031 $15,497 8/23 $13,732 $14,455 $14,962 9/23 $12,900 $13,961 $14,342 10/23 $12,251 $13,395 $13,527 11/23 $13,624 $14,638 $14,887 12/23 $14,753 $15,416 $15,897 1/24 $14,196 $15,505 $15,722 2/24 $14,390 $15,789 $15,834 3/24 $14,677 $16,308 $16,387 4/24 $14,095 $15,890 $15,890 5/24 $14,669 $16,506 $16,528 6/24 $14,306 $16,239 $16,039 7/24 $15,327 $16,716 $16,818 8/24 $15,699 $17,259 $17,276 9/24 $15,959 $17,419 $17,683 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class A 23.72% 5.39% 5.35% Class A with 5.25% Maximum Sales Charge 17.22% 4.26% 4.78% MSCI EAFE Index (net of foreign withholding taxes ) Footnote Reference 24.77% 8.19% 5.70% MSCI EAFE SMID Cap Index (net of foreign withholding taxes) 23.30% 6.27% 5.86% | |
AssetsNet | $ 381,101,260 | |
Holdings Count | Holding | 98 | |
Advisory Fees Paid, Amount | $ 2,784,424 | |
InvestmentCompanyPortfolioTurnover | 31% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $381,101,260 # of Portfolio Holdings 98 Portfolio Turnover Rate 31% Total Advisory Fees Paid $2,784,424 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 10.8% Belgium 2.4% Germany 2.9% Canada 3.8% Sweden 4.2% Netherlands 4.9% United States 7.1% Italy 7.2% Australia 7.6% United Kingdom 24.4% Japan 24.7% Top Ten Holdings (% of total investments) Footnote Reference CAR Group Ltd. 1.9% JTC PLC 1.8% Diploma PLC 1.8% Sanwa Holdings Corp. 1.6% Euronext NV 1.6% Volution Group PLC 1.6% IMCD NV 1.5% BayCurrent, Inc. 1.5% Games Workshop Group PLC 1.5% Greggs PLC 1.5% Total 16.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000047591 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Opportunities Fund | |
Class Name | Class C | |
Trading Symbol | COICX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Opportunities Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B312"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 C $232 2.08% | |
Expenses Paid, Amount | $ 232 | |
Expense Ratio, Percent | 2.08% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE SMID Cap Index (the Index): ↓ ATS Corp., a Canadian manufacturer of factory automation systems, detracted from Index-relative performance as its backlog of business declined ↓ SUMCO Corp., a Tokyo-based silicon wafer maker, hampered returns on lower-than-expected earnings due to slowing demand and adjustments to customer inventory ↓ Dip Corp., a Japanese online job-board operator, detracted from returns amid weak demand for job seekers by restaurants and manufacturers that hindered sales ↓ Spark New Zealand Ltd., a New Zealand-based telecommunications company, hampered returns as weak demand for IT services led to lower-than-expected earnings ↑ Zegona Communications PLC contributed to Index-relative returns after completing its acquisition of Vodafone Spain and restructuring its business operations ↑ Addtech AB, a Swedish industrial products group, helped returns on robust growth, profit generation, astute acquisitions, and a favorable market outlook ↑ Sanwa Holdings Corp., a Japanese building materials company, aided Fund performance as domestic demand was strong and price increases led to growth ↑ Volution Group PLC, a U.K.-based ventilation products firm, helped returns as profits rose on the strength of its renovations market and business acquisitions | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class C MSCI EAFE Index MSCI EAFE SMID Cap Index 9/14 $10,000 $10,000 $10,000 10/14 $9,888 $9,855 $9,864 11/14 $9,826 $9,989 $9,982 12/14 $9,637 $9,643 $9,876 1/15 $9,651 $9,690 $9,954 2/15 $10,216 $10,269 $10,574 3/15 $10,176 $10,113 $10,426 4/15 $10,581 $10,526 $10,867 5/15 $10,661 $10,472 $10,932 6/15 $10,415 $10,176 $10,720 7/15 $10,349 $10,387 $10,882 8/15 $9,724 $9,623 $10,305 9/15 $9,491 $9,134 $9,918 10/15 $9,983 $9,848 $10,588 11/15 $9,830 $9,695 $10,545 12/15 $9,722 $9,564 $10,529 1/16 $9,069 $8,873 $9,746 2/16 $8,980 $8,710 $9,702 3/16 $9,729 $9,277 $10,457 4/16 $9,839 $9,545 $10,700 5/16 $9,928 $9,459 $10,659 6/16 $9,227 $9,141 $10,147 7/16 $9,653 $9,605 $10,768 8/16 $9,777 $9,611 $10,718 9/16 $9,914 $9,729 $10,958 10/16 $9,735 $9,530 $10,634 11/16 $9,522 $9,341 $10,377 12/16 $9,694 $9,660 $10,668 1/17 $9,962 $9,940 $11,061 2/17 $10,175 $10,082 $11,267 3/17 $10,519 $10,360 $11,506 4/17 $11,082 $10,623 $11,941 5/17 $11,564 $11,013 $12,389 6/17 $11,626 $10,994 $12,384 7/17 $12,121 $11,311 $12,802 8/17 $12,155 $11,307 $12,889 9/17 $12,574 $11,588 $13,214 10/17 $12,726 $11,764 $13,463 11/17 $13,057 $11,887 $13,628 12/17 $13,269 $12,078 $13,952 1/18 $14,059 $12,684 $14,638 2/18 $13,496 $12,112 $14,073 3/18 $13,526 $11,893 $13,860 4/18 $13,599 $12,165 $14,092 5/18 $13,577 $11,891 $13,954 6/18 $13,299 $11,746 $13,694 7/18 $13,452 $12,035 $13,873 8/18 $13,379 $11,803 $13,769 9/18 $13,445 $11,905 $13,716 10/18 $12,055 $10,958 $12,411 11/18 $11,995 $10,944 $12,297 12/18 $11,229 $10,413 $11,587 1/19 $11,971 $11,097 $12,490 2/19 $12,280 $11,380 $12,770 3/19 $12,359 $11,452 $12,801 4/19 $12,722 $11,774 $13,185 5/19 $12,043 $11,208 $12,478 6/19 $12,714 $11,873 $13,110 7/19 $12,367 $11,722 $12,990 8/19 $12,161 $11,419 $12,689 9/19 $12,438 $11,746 $13,044 10/19 $12,872 $12,168 $13,628 11/19 $13,402 $12,305 $13,905 12/19 $14,017 $12,705 $14,411 1/20 $13,636 $12,440 $14,046 2/20 $12,550 $11,315 $12,711 3/20 $10,384 $9,805 $10,609 4/20 $11,431 $10,438 $11,611 5/20 $12,454 $10,893 $12,378 6/20 $12,597 $11,264 $12,615 7/20 $13,049 $11,526 $12,989 8/20 $13,826 $12,119 $13,914 9/20 $13,890 $11,804 $13,729 10/20 $13,469 $11,333 $13,272 11/20 $14,818 $13,089 $15,166 12/20 $15,817 $13,698 $16,045 1/21 $15,492 $13,552 $15,977 2/21 $15,651 $13,856 $16,256 3/21 $16,015 $14,175 $16,617 4/21 $16,880 $14,601 $17,209 5/21 $17,292 $15,077 $17,588 6/21 $16,991 $14,908 $17,347 7/21 $17,665 $15,020 $17,581 8/21 $18,173 $15,285 $17,993 9/21 $17,348 $14,841 $17,352 10/21 $17,919 $15,206 $17,623 11/21 $17,062 $14,498 $16,740 12/21 $17,826 $15,241 $17,450 1/22 $16,156 $14,504 $16,160 2/22 $15,554 $14,248 $15,973 3/22 $15,029 $14,339 $15,959 4/22 $13,791 $13,412 $14,850 5/22 $13,707 $13,512 $14,780 6/22 $12,215 $12,259 $13,243 7/22 $13,452 $12,869 $14,057 8/22 $12,325 $12,258 $13,409 9/22 $11,130 $11,111 $11,902 10/22 $11,664 $11,709 $12,460 11/22 $13,206 $13,028 $13,730 12/22 $12,944 $13,038 $13,817 1/23 $13,868 $14,094 $14,936 2/23 $13,444 $13,800 $14,627 3/23 $13,537 $14,142 $14,700 4/23 $13,859 $14,541 $15,026 5/23 $13,376 $13,926 $14,379 6/23 $13,740 $14,560 $14,788 7/23 $14,164 $15,031 $15,497 8/23 $13,512 $14,455 $14,962 9/23 $12,681 $13,961 $14,342 10/23 $12,037 $13,395 $13,527 11/23 $13,376 $14,638 $14,887 12/23 $14,471 $15,416 $15,897 1/24 $13,925 $15,505 $15,722 2/24 $14,104 $15,789 $15,834 3/24 $14,377 $16,308 $16,387 4/24 $13,797 $15,890 $15,890 5/24 $14,352 $16,506 $16,528 6/24 $13,993 $16,239 $16,039 7/24 $14,975 $16,716 $16,818 8/24 $15,326 $17,259 $17,276 9/24 $15,804 $17,419 $17,683 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class C 22.81% 4.60% 4.68% Class C with 1% Maximum Deferred Sales Charge 21.81% 4.60% 4.68% MSCI EAFE Index (net of foreign withholding taxes ) Footnote Reference 24.77% 8.19% 5.70% MSCI EAFE SMID Cap Index (net of foreign withholding taxes) 23.30% 6.27% 5.86% | |
AssetsNet | $ 381,101,260 | |
Holdings Count | Holding | 98 | |
Advisory Fees Paid, Amount | $ 2,784,424 | |
InvestmentCompanyPortfolioTurnover | 31% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $381,101,260 # of Portfolio Holdings 98 Portfolio Turnover Rate 31% Total Advisory Fees Paid $2,784,424 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 10.8% Belgium 2.4% Germany 2.9% Canada 3.8% Sweden 4.2% Netherlands 4.9% United States 7.1% Italy 7.2% Australia 7.6% United Kingdom 24.4% Japan 24.7% Top Ten Holdings (% of total investments) Footnote Reference CAR Group Ltd. 1.9% JTC PLC 1.8% Diploma PLC 1.8% Sanwa Holdings Corp. 1.6% Euronext NV 1.6% Volution Group PLC 1.6% IMCD NV 1.5% BayCurrent, Inc. 1.5% Games Workshop Group PLC 1.5% Greggs PLC 1.5% Total 16.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000047592 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Opportunities Fund | |
Class Name | Class I | |
Trading Symbol | COIIX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Opportunities Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B337"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $121 1.08% | |
Expenses Paid, Amount | $ 121 | |
Expense Ratio, Percent | 1.08% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE SMID Cap Index (the Index): ↑ Zegona Communications PLC contributed to Index-relative returns after completing its acquisition of Vodafone Spain and restructuring its business operations ↑ Addtech AB, a Swedish industrial products group, helped returns on robust growth, profit generation, astute acquisitions, and a favorable market outlook ↑ Sanwa Holdings Corp., a Japanese building materials company, aided Fund performance as domestic demand was strong and price increases led to growth ↑ Volution Group PLC, a U.K.-based ventilation products firm, helped returns as profits rose on the strength of its renovations market and business acquisitions ↓ ATS Corp., a Canadian manufacturer of factory automation systems, detracted from Index-relative performance as its backlog of business declined ↓ SUMCO Corp., a Tokyo-based silicon wafer maker, hampered returns on lower-than-expected earnings due to slowing demand and adjustments to customer inventory ↓ Dip Corp., a Japanese online job-board operator, detracted from returns amid weak demand for job seekers by restaurants and manufacturers that hindered sales ↓ Spark New Zealand Ltd., a New Zealand-based telecommunications company, hampered returns as weak demand for IT services led to lower-than-expected earnings | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class I MSCI EAFE Index MSCI EAFE SMID Cap Index 9/14 $1,000,000 $1,000,000 $1,000,000 10/14 $989,507 $985,480 $986,360 11/14 $984,566 $998,885 $998,164 12/14 $966,752 $964,282 $987,552 1/15 $969,422 $968,996 $995,353 2/15 $1,027,595 $1,026,923 $1,057,407 3/15 $1,024,255 $1,011,323 $1,042,635 4/15 $1,066,372 $1,052,614 $1,086,691 5/15 $1,075,065 $1,047,226 $1,093,243 6/15 $1,051,664 $1,017,555 $1,072,010 7/15 $1,046,319 $1,038,682 $1,088,208 8/15 $984,814 $962,274 $1,030,471 9/15 $961,418 $913,414 $991,829 10/15 $1,012,899 $984,815 $1,058,843 11/15 $998,196 $969,494 $1,054,542 12/15 $988,897 $956,431 $1,052,866 1/16 $923,198 $887,268 $974,594 2/16 $915,508 $871,012 $970,160 3/16 $993,083 $927,687 $1,045,651 4/16 $1,005,663 $954,545 $1,070,050 5/16 $1,015,452 $945,873 $1,065,909 6/16 $944,864 $914,123 $1,014,696 7/16 $989,585 $960,451 $1,076,804 8/16 $1,003,556 $961,133 $1,071,820 9/16 $1,017,534 $972,940 $1,095,806 10/16 $1,000,757 $953,039 $1,063,392 11/16 $979,786 $934,058 $1,037,736 12/16 $998,283 $965,997 $1,066,799 1/17 $1,027,370 $994,019 $1,106,109 2/17 $1,050,078 $1,008,233 $1,126,671 3/17 $1,086,980 $1,035,988 $1,150,620 4/17 $1,145,867 $1,062,349 $1,194,115 5/17 $1,197,671 $1,101,341 $1,238,901 6/17 $1,204,772 $1,099,393 $1,238,362 7/17 $1,257,281 $1,131,106 $1,280,207 8/17 $1,262,239 $1,130,680 $1,288,940 9/17 $1,306,930 $1,158,812 $1,321,359 10/17 $1,323,963 $1,176,408 $1,346,333 11/17 $1,359,875 $1,188,748 $1,362,799 12/17 $1,382,720 $1,207,828 $1,395,196 1/18 $1,466,510 $1,268,412 $1,463,815 2/18 $1,408,610 $1,211,161 $1,407,267 3/18 $1,413,174 $1,189,332 $1,385,990 4/18 $1,421,544 $1,216,487 $1,409,192 5/18 $1,420,794 $1,189,143 $1,395,395 6/18 $1,392,599 $1,174,615 $1,369,355 7/18 $1,410,131 $1,203,529 $1,387,263 8/18 $1,403,278 $1,180,286 $1,376,894 9/18 $1,410,901 $1,190,529 $1,371,614 10/18 $1,266,162 $1,095,772 $1,241,064 11/18 $1,260,882 $1,094,392 $1,229,737 12/18 $1,181,036 $1,041,266 $1,158,658 1/19 $1,260,889 $1,109,698 $1,248,960 2/19 $1,294,157 $1,137,985 $1,277,045 3/19 $1,303,299 $1,145,161 $1,280,081 4/19 $1,343,217 $1,177,358 $1,318,464 5/19 $1,272,531 $1,120,814 $1,247,777 6/19 $1,344,881 $1,187,307 $1,311,032 7/19 $1,309,119 $1,172,232 $1,298,952 8/19 $1,288,318 $1,141,864 $1,268,872 9/19 $1,319,096 $1,174,585 $1,304,390 10/19 $1,365,678 $1,216,787 $1,362,788 11/19 $1,423,890 $1,230,504 $1,390,488 12/19 $1,489,216 $1,270,495 $1,441,068 1/20 $1,450,422 $1,243,957 $1,404,602 2/20 $1,335,748 $1,131,507 $1,271,130 3/20 $1,106,372 $980,486 $1,060,907 4/20 $1,218,535 $1,043,828 $1,161,093 5/20 $1,329,001 $1,089,282 $1,237,761 6/20 $1,345,871 $1,126,371 $1,261,512 7/20 $1,395,632 $1,152,626 $1,298,937 8/20 $1,479,118 $1,211,883 $1,391,360 9/20 $1,487,563 $1,180,394 $1,372,921 10/20 $1,443,703 $1,133,263 $1,327,174 11/20 $1,589,586 $1,308,934 $1,516,647 12/20 $1,698,267 $1,369,794 $1,604,455 1/21 $1,665,116 $1,355,200 $1,597,686 2/21 $1,682,950 $1,385,596 $1,625,562 3/21 $1,723,747 $1,417,456 $1,661,698 4/21 $1,818,957 $1,460,106 $1,720,895 5/21 $1,864,857 $1,507,722 $1,758,761 6/21 $1,833,414 $1,490,754 $1,734,745 7/21 $1,908,225 $1,501,979 $1,758,075 8/21 $1,964,324 $1,528,472 $1,799,343 9/21 $1,876,775 $1,484,115 $1,735,170 10/21 $1,939,675 $1,520,617 $1,762,274 11/21 $1,848,726 $1,449,842 $1,674,045 12/21 $1,934,002 $1,524,079 $1,745,004 1/22 $1,754,180 $1,450,430 $1,616,028 2/22 $1,689,958 $1,424,784 $1,597,337 3/22 $1,633,993 $1,433,942 $1,595,923 4/22 $1,500,961 $1,341,173 $1,484,970 5/22 $1,492,704 $1,351,228 $1,477,977 6/22 $1,331,232 $1,225,851 $1,324,259 7/22 $1,467,015 $1,286,935 $1,405,718 8/22 $1,345,911 $1,225,812 $1,340,921 9/22 $1,216,549 $1,111,141 $1,190,210 10/22 $1,275,267 $1,170,892 $1,246,041 11/22 $1,445,914 $1,302,777 $1,373,014 12/22 $1,417,915 $1,303,824 $1,381,711 1/23 $1,519,459 $1,409,404 $1,493,552 2/23 $1,475,149 $1,379,994 $1,462,688 3/23 $1,487,150 $1,414,196 $1,469,950 4/23 $1,523,151 $1,454,123 $1,502,639 5/23 $1,471,457 $1,392,587 $1,437,860 6/23 $1,512,074 $1,455,963 $1,478,809 7/23 $1,560,999 $1,503,073 $1,549,684 8/23 $1,489,919 $1,445,487 $1,496,203 9/23 $1,399,453 $1,396,112 $1,434,164 10/23 $1,329,296 $1,339,511 $1,352,697 11/23 $1,478,842 $1,463,842 $1,488,715 12/23 $1,601,153 $1,541,614 $1,589,673 1/24 $1,541,956 $1,550,486 $1,572,186 2/24 $1,562,628 $1,578,867 $1,583,412 3/24 $1,594,576 $1,630,795 $1,638,671 4/24 $1,531,620 $1,589,032 $1,589,011 5/24 $1,594,576 $1,650,584 $1,652,827 6/24 $1,555,111 $1,623,937 $1,603,865 7/24 $1,665,989 $1,671,578 $1,681,778 8/24 $1,707,333 $1,725,931 $1,727,573 9/24 $1,736,479 $1,741,869 $1,768,280 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class I 24.08% 5.65% 5.67% MSCI EAFE Index (net of foreign withholding taxes ) Footnote Reference 24.77% 8.19% 5.70% MSCI EAFE SMID Cap Index (net of foreign withholding taxes) 23.30% 6.27% 5.86% | |
AssetsNet | $ 381,101,260 | |
Holdings Count | Holding | 98 | |
Advisory Fees Paid, Amount | $ 2,784,424 | |
InvestmentCompanyPortfolioTurnover | 31% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $381,101,260 # of Portfolio Holdings 98 Portfolio Turnover Rate 31% Total Advisory Fees Paid $2,784,424 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 10.8% Belgium 2.4% Germany 2.9% Canada 3.8% Sweden 4.2% Netherlands 4.9% United States 7.1% Italy 7.2% Australia 7.6% United Kingdom 24.4% Japan 24.7% Top Ten Holdings (% of total investments) Footnote Reference CAR Group Ltd. 1.9% JTC PLC 1.8% Diploma PLC 1.8% Sanwa Holdings Corp. 1.6% Euronext NV 1.6% Volution Group PLC 1.6% IMCD NV 1.5% BayCurrent, Inc. 1.5% Games Workshop Group PLC 1.5% Greggs PLC 1.5% Total 16.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000211125 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert International Opportunities Fund | |
Class Name | Class R6 | |
Trading Symbol | COIRX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert International Opportunities Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B362"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 R6 $112 1.00% | |
Expenses Paid, Amount | $ 112 | |
Expense Ratio, Percent | 1% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the MSCI EAFE SMID Cap Index (the Index): ↑ Zegona Communications PLC contributed to Index-relative returns after completing its acquisition of Vodafone Spain and restructuring its business operations ↑ Addtech AB, a Swedish industrial products group, helped returns on robust growth, profit generation, astute acquisitions, and a favorable market outlook ↑ Sanwa Holdings Corp., a Japanese building materials company, aided Fund performance as domestic demand was strong and price increases led to growth ↑ Volution Group PLC, a U.K.-based ventilation products firm, helped returns as profits rose on the strength of its renovations market and business acquisitions ↓ ATS Corp., a Canadian manufacturer of factory automation systems, detracted from Index-relative performance as its backlog of business declined ↓ SUMCO Corp., a Tokyo-based silicon wafer maker, hampered returns on lower-than-expected earnings due to slowing demand and adjustments to customer inventory ↓ Dip Corp., a Japanese online job-board operator, detracted from returns amid weak demand for job seekers by restaurants and manufacturers that hindered sales ↓ Spark New Zealand Ltd., a New Zealand-based telecommunications company, hampered returns as weak demand for IT services led to lower-than-expected earnings | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class R6 MSCI EAFE Index MSCI EAFE SMID Cap Index 9/14 $5,000,000 $5,000,000 $5,000,000 10/14 $4,947,498 $4,927,402 $4,931,800 11/14 $4,922,792 $4,994,423 $4,990,820 12/14 $4,833,722 $4,821,409 $4,937,760 1/15 $4,847,093 $4,844,979 $4,976,764 2/15 $5,137,919 $5,134,616 $5,287,036 3/15 $5,121,204 $5,056,615 $5,213,177 4/15 $5,331,802 $5,263,072 $5,433,455 5/15 $5,375,259 $5,236,131 $5,466,214 6/15 $5,258,260 $5,087,773 $5,360,049 7/15 $5,231,518 $5,193,412 $5,441,040 8/15 $4,923,978 $4,811,369 $5,152,355 9/15 $4,806,979 $4,567,069 $4,959,147 10/15 $5,064,377 $4,924,074 $5,294,216 11/15 $4,990,834 $4,847,471 $5,272,710 12/15 $4,944,371 $4,782,156 $5,264,328 1/16 $4,615,911 $4,436,339 $4,872,969 2/16 $4,577,474 $4,355,062 $4,850,802 3/16 $4,965,336 $4,638,435 $5,228,257 4/16 $5,028,233 $4,772,723 $5,350,248 5/16 $5,077,153 $4,729,366 $5,329,546 6/16 $4,724,233 $4,570,613 $5,073,479 7/16 $4,947,865 $4,802,255 $5,384,018 8/16 $5,017,750 $4,805,665 $5,359,098 9/16 $5,087,635 $4,864,699 $5,479,029 10/16 $5,003,773 $4,765,193 $5,316,958 11/16 $4,898,946 $4,670,289 $5,188,678 12/16 $4,991,424 $4,829,987 $5,333,995 1/17 $5,136,874 $4,970,093 $5,530,547 2/17 $5,250,396 $5,041,163 $5,633,355 3/17 $5,434,869 $5,179,940 $5,753,098 4/17 $5,729,317 $5,311,743 $5,970,574 5/17 $5,988,290 $5,506,705 $6,194,503 6/17 $6,023,765 $5,496,966 $6,191,810 7/17 $6,286,285 $5,655,530 $6,401,037 8/17 $6,311,118 $5,653,399 $6,444,698 9/17 $6,534,614 $5,794,059 $6,606,794 10/17 $6,619,756 $5,882,040 $6,731,663 11/17 $6,799,261 $5,943,738 $6,813,996 12/17 $6,913,535 $6,039,142 $6,975,981 1/18 $7,332,537 $6,342,062 $7,319,076 2/18 $7,043,044 $6,055,807 $7,036,333 3/18 $7,065,899 $5,946,659 $6,929,952 4/18 $7,107,799 $6,082,437 $7,045,959 5/18 $7,103,990 $5,945,716 $6,976,977 6/18 $6,963,053 $5,873,076 $6,846,776 7/18 $7,050,663 $6,017,644 $6,936,316 8/18 $7,016,381 $5,901,428 $6,884,468 9/18 $7,054,472 $5,952,645 $6,858,068 10/18 $6,330,741 $5,478,862 $6,205,319 11/18 $6,304,469 $5,471,958 $6,148,683 12/18 $5,905,242 $5,206,328 $5,793,289 1/19 $6,304,469 $5,548,488 $6,244,799 2/19 $6,466,656 $5,689,927 $6,385,227 3/19 $6,516,559 $5,725,806 $6,400,403 4/19 $6,716,173 $5,886,789 $6,592,318 5/19 $6,362,690 $5,604,071 $6,238,886 6/19 $6,724,490 $5,936,535 $6,555,159 7/19 $6,545,669 $5,861,160 $6,494,760 8/19 $6,441,704 $5,709,321 $6,344,359 9/19 $6,595,573 $5,872,927 $6,521,949 10/19 $6,828,456 $6,083,936 $6,813,940 11/19 $7,119,559 $6,152,522 $6,952,441 12/19 $7,448,732 $6,352,477 $7,205,341 1/20 $7,254,601 $6,219,787 $7,023,008 2/20 $6,680,648 $5,657,533 $6,355,648 3/20 $5,536,961 $4,902,432 $5,304,534 4/20 $6,098,254 $5,219,142 $5,805,463 5/20 $6,651,106 $5,446,408 $6,188,804 6/20 $6,731,290 $5,631,856 $6,307,560 7/20 $6,980,285 $5,763,129 $6,494,683 8/20 $7,402,309 $6,059,416 $6,956,798 9/20 $7,444,512 $5,901,972 $6,864,606 10/20 $7,225,059 $5,666,313 $6,635,870 11/20 $7,959,382 $6,544,668 $7,583,234 12/20 $8,497,724 $6,848,969 $8,022,275 1/21 $8,331,687 $6,776,000 $7,988,429 2/21 $8,425,349 $6,927,981 $8,127,812 3/21 $8,629,703 $7,087,278 $8,308,490 4/21 $9,106,529 $7,300,531 $8,604,477 5/21 $9,336,428 $7,538,608 $8,793,807 6/21 $9,178,905 $7,453,770 $8,673,724 7/21 $9,553,554 $7,509,893 $8,790,377 8/21 $9,838,798 $7,642,362 $8,996,717 9/21 $9,396,031 $7,420,573 $8,675,849 10/21 $9,715,334 $7,603,085 $8,811,371 11/21 $9,259,795 $7,249,209 $8,370,227 12/21 $9,684,156 $7,620,396 $8,725,020 1/22 $8,787,475 $7,252,149 $8,080,142 2/22 $8,465,589 $7,123,920 $7,986,686 3/22 $8,185,089 $7,169,709 $7,979,615 4/22 $7,518,326 $6,705,866 $7,424,852 5/22 $7,476,941 $6,756,139 $7,389,883 6/22 $6,667,629 $6,129,253 $6,621,296 7/22 $7,352,785 $6,434,673 $7,028,590 8/22 $6,745,801 $6,129,061 $6,704,603 9/22 $6,097,431 $5,555,706 $5,951,049 10/22 $6,396,325 $5,854,462 $6,230,204 11/22 $7,247,023 $6,513,884 $6,865,069 12/22 $7,104,843 $6,519,118 $6,908,555 1/23 $7,619,283 $7,047,018 $7,467,761 2/23 $7,396,822 $6,899,971 $7,313,440 3/23 $7,457,072 $7,070,980 $7,349,751 4/23 $7,637,822 $7,270,614 $7,513,193 5/23 $7,378,284 $6,962,935 $7,189,299 6/23 $7,582,207 $7,279,815 $7,394,045 7/23 $7,827,840 $7,515,365 $7,748,418 8/23 $7,470,976 $7,227,433 $7,481,013 9/23 $7,021,420 $6,980,561 $7,170,822 10/23 $6,669,190 $6,697,556 $6,763,483 11/23 $7,415,361 $7,319,209 $7,443,573 12/23 $8,033,940 $7,708,071 $7,948,364 1/24 $7,736,562 $7,752,430 $7,860,930 2/24 $7,840,408 $7,894,334 $7,917,061 3/24 $8,000,898 $8,153,976 $8,193,357 4/24 $7,684,638 $7,945,162 $7,945,056 5/24 $8,000,898 $8,252,918 $8,264,135 6/24 $7,807,366 $8,119,684 $8,019,324 7/24 $8,364,361 $8,357,888 $8,408,888 8/24 $8,572,054 $8,629,654 $8,637,865 9/24 $8,718,383 $8,709,344 $8,841,402 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class R6 24.17% 5.73% 5.71% MSCI EAFE Index (net of foreign withholding taxes ) Footnote Reference 24.77% 8.19% 5.70% MSCI EAFE SMID Cap Index (net of foreign withholding taxes) 23.30% 6.27% 5.86% | |
AssetsNet | $ 381,101,260 | |
Holdings Count | Holding | 98 | |
Advisory Fees Paid, Amount | $ 2,784,424 | |
InvestmentCompanyPortfolioTurnover | 31% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $381,101,260 # of Portfolio Holdings 98 Portfolio Turnover Rate 31% Total Advisory Fees Paid $2,784,424 | |
Holdings [Text Block] | Country Allocation (% of total investments) Value Value Other 10.8% Belgium 2.4% Germany 2.9% Canada 3.8% Sweden 4.2% Netherlands 4.9% United States 7.1% Italy 7.2% Australia 7.6% United Kingdom 24.4% Japan 24.7% Top Ten Holdings (% of total investments) Footnote Reference CAR Group Ltd. 1.9% JTC PLC 1.8% Diploma PLC 1.8% Sanwa Holdings Corp. 1.6% Euronext NV 1.6% Volution Group PLC 1.6% IMCD NV 1.5% BayCurrent, Inc. 1.5% Games Workshop Group PLC 1.5% Greggs PLC 1.5% Total 16.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000023780 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Mid-Cap Fund | |
Class Name | Class A | |
Trading Symbol | CCAFX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Mid-Cap Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B387"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $132 1.18% | |
Expenses Paid, Amount | $ 132 | |
Expense Ratio, Percent | 1.18% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Russell Midcap ® ↓ Rentokil Initial Plc., a pest control and hygiene services provider, detracted from relative returns on challenges related to its 2022 acquisition of Terminix ↓ VeriSign, Inc., a provider of domain registration and internet services, hurt returns as Chinese registrations fell and its prospects disappointed investors ↓ Aptiv, a provider of auto industry electronics, detracted from returns on lower new car production volumes. The stock was sold by period-end ↓ Envista Holdings Corp., a provider of dental equipment, detracted from Index-relative returns on lower revenues and demand. The stock was sold by period-end ↑ Core & Main, Inc. ― a wastewater, storm drainage, and fire protection equipment distributor ― contributed to returns on better-than-expected sales and earnings ↑ Motorola Solutions, Inc., an information technology business, contributed to returns on record cash flows, and double-digit revenue and earnings growth ↑ Lamar Advertising Co., an outdoor advertising business, contributed to performance supported by robust demand from local and regional advertisers ↑ Trex Company, Inc., a composite deck maker, helped returns on strong revenue and margins growth during the first half of the period. Trex was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class A with Maximum Sales Charge Russell 3000 ® Russell Midcap ® 9/14 $9,475 $10,000 $10,000 10/14 $9,844 $10,275 $10,308 11/14 $9,995 $10,524 $10,572 12/14 $10,010 $10,524 $10,594 1/15 $9,844 $10,231 $10,429 2/15 $10,700 $10,824 $11,006 3/15 $10,861 $10,713 $11,013 4/15 $10,697 $10,762 $10,913 5/15 $10,811 $10,911 $11,073 6/15 $10,858 $10,728 $10,844 7/15 $10,888 $10,908 $10,924 8/15 $10,153 $10,249 $10,348 9/15 $9,939 $9,951 $9,975 10/15 $10,343 $10,736 $10,594 11/15 $10,171 $10,796 $10,621 12/15 $9,640 $10,574 $10,336 1/16 $9,184 $9,978 $9,659 2/16 $9,224 $9,975 $9,768 3/16 $9,893 $10,677 $10,568 4/16 $9,558 $10,743 $10,680 5/16 $9,660 $10,935 $10,855 6/16 $9,571 $10,958 $10,904 7/16 $9,817 $11,393 $11,402 8/16 $9,847 $11,422 $11,374 9/16 $9,732 $11,440 $11,397 10/16 $9,558 $11,192 $11,035 11/16 $10,083 $11,693 $11,630 12/16 $10,256 $11,921 $11,762 1/17 $10,332 $12,145 $12,046 2/17 $10,596 $12,597 $12,387 3/17 $10,553 $12,606 $12,368 4/17 $10,628 $12,739 $12,463 5/17 $10,760 $12,870 $12,577 6/17 $10,787 $12,986 $12,702 7/17 $10,886 $13,231 $12,889 8/17 $10,737 $13,256 $12,789 9/17 $11,008 $13,579 $13,143 10/17 $11,110 $13,876 $13,362 11/17 $11,351 $14,297 $13,812 12/17 $11,457 $14,440 $13,940 1/18 $11,842 $15,201 $14,465 2/18 $11,399 $14,641 $13,868 3/18 $11,486 $14,347 $13,876 4/18 $11,581 $14,402 $13,855 5/18 $11,926 $14,808 $14,170 6/18 $12,043 $14,905 $14,267 7/18 $12,348 $15,400 $14,623 8/18 $12,679 $15,940 $15,077 9/18 $12,664 $15,967 $14,980 10/18 $11,705 $14,791 $13,736 11/18 $12,108 $15,087 $14,073 12/18 $10,958 $13,683 $12,678 1/19 $11,880 $14,858 $14,045 2/19 $12,464 $15,380 $14,648 3/19 $12,569 $15,605 $14,774 4/19 $13,067 $16,228 $15,336 5/19 $12,479 $15,178 $14,395 6/19 $13,242 $16,244 $15,384 7/19 $13,639 $16,485 $15,603 8/19 $13,456 $16,149 $15,159 9/19 $13,495 $16,433 $15,458 10/19 $13,514 $16,786 $15,620 11/19 $14,016 $17,424 $16,178 12/19 $14,308 $17,928 $16,550 1/20 $14,374 $17,908 $16,417 2/20 $13,156 $16,442 $14,991 3/20 $10,938 $14,181 $12,069 4/20 $12,131 $16,059 $13,803 5/20 $12,705 $16,918 $14,773 6/20 $12,865 $17,304 $15,039 7/20 $13,599 $18,287 $15,922 8/20 $14,145 $19,612 $16,482 9/20 $13,928 $18,898 $16,161 10/20 $13,964 $18,490 $16,264 11/20 $15,289 $20,739 $18,512 12/20 $15,977 $21,672 $19,380 1/21 $15,683 $21,576 $19,328 2/21 $16,423 $22,250 $20,405 3/21 $16,754 $23,048 $20,957 4/21 $17,437 $24,236 $22,025 5/21 $17,499 $24,346 $22,202 6/21 $17,607 $24,947 $22,529 7/21 $17,760 $25,369 $22,702 8/21 $18,177 $26,092 $23,279 9/21 $17,288 $24,921 $22,320 10/21 $17,995 $26,607 $23,648 11/21 $17,425 $26,202 $22,824 12/21 $18,322 $27,234 $23,756 1/22 $16,702 $25,631 $22,006 2/22 $16,740 $24,986 $21,848 3/22 $17,078 $25,796 $22,407 4/22 $15,797 $23,481 $20,681 5/22 $15,571 $23,450 $20,698 6/22 $14,286 $21,488 $18,632 7/22 $15,623 $23,504 $20,471 8/22 $14,778 $22,627 $19,829 9/22 $13,474 $20,528 $17,991 10/22 $14,445 $22,212 $19,588 11/22 $15,304 $23,371 $20,765 12/22 $14,722 $22,003 $19,643 1/23 $15,868 $23,518 $21,274 2/23 $15,469 $22,968 $20,758 3/23 $15,506 $23,583 $20,440 4/23 $15,534 $23,834 $20,332 5/23 $15,032 $23,927 $19,764 6/23 $15,886 $25,560 $21,413 7/23 $16,290 $26,477 $22,262 8/23 $15,788 $25,966 $21,490 9/23 $14,830 $24,729 $20,410 10/23 $14,178 $24,073 $19,391 11/23 $15,600 $26,318 $21,375 12/23 $16,403 $27,714 $23,027 1/24 $16,215 $28,021 $22,699 2/24 $16,924 $29,538 $23,967 3/24 $17,530 $30,491 $25,007 4/24 $16,563 $29,149 $23,656 5/24 $17,013 $30,526 $24,331 6/24 $16,901 $31,471 $24,170 7/24 $17,647 $32,056 $25,309 8/24 $18,182 $32,754 $25,822 9/24 $18,344 $33,432 $26,396 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class A 23.71% 6.33% 6.82% Class A with 5.25% Maximum Sales Charge 17.22% 5.19% 6.25% Russell 3000 ® Index Footnote Reference 35.19% 15.25% 12.82% Russell Midcap ® 29.33% 11.28% 10.18% | |
AssetsNet | $ 235,021,560 | |
Holdings Count | Holding | 60 | |
Advisory Fees Paid, Amount | $ 1,345,606 | |
InvestmentCompanyPortfolioTurnover | 26% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $235,021,560 # of Portfolio Holdings 60 Portfolio Turnover Rate 26% Total Advisory Fees Paid $1,345,606 | |
Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Short-Term Investments 3.7% Consumer Staples 4.6% Utilities 4.9% Materials 5.8% Real Estate 8.7% Health Care 10.8% Information Technology 12.1% Financials 15.0% Consumer Discretionary 15.0% Industrials 19.4% Top Ten Holdings (% of total investments) Footnote Reference AptarGroup, Inc. 3.5% Motorola Solutions, Inc. 3.4% Tradeweb Markets, Inc., Class A 3.0% Dorman Products, Inc. 2.8% Lamar Advertising Co., Class A 2.7% Cooper Cos., Inc. 2.7% Equity LifeStyle Properties, Inc. 2.6% Copart, Inc. 2.6% AMETEK, Inc. 2.5% CMS Energy Corp. 2.5% Total 28.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000023782 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Mid-Cap Fund | |
Class Name | Class C | |
Trading Symbol | CCACX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Mid-Cap Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B412"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 C $215 1.93% | |
Expenses Paid, Amount | $ 215 | |
Expense Ratio, Percent | 1.93% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Russell Midcap ® ↓ Rentokil Initial Plc., a pest control and hygiene services provider, detracted from relative returns on challenges related to its 2022 acquisition of Terminix ↓ VeriSign, Inc., a provider of domain registration and internet services, hurt returns as Chinese registrations fell and its prospects disappointed investors ↓ Aptiv, a provider of auto industry electronics, detracted from returns on lower new car production volumes. The stock was sold by period-end ↓ Envista Holdings Corp., a provider of dental equipment, detracted from Index-relative returns on lower revenues and demand. The stock was sold by period-end ↑ Core & Main, Inc. ― a wastewater, storm drainage, and fire protection equipment distributor ― contributed to returns on better-than-expected sales and earnings ↑ Motorola Solutions, Inc., an information technology business, contributed to returns on record cash flows, and double-digit revenue and earnings growth ↑ Lamar Advertising Co., an outdoor advertising business, contributed to performance supported by robust demand from local and regional advertisers ↑ Trex Company, Inc., a composite deck maker, helped returns on strong revenue and margins growth during the first half of the period. Trex was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class C Russell 3000 ® Russell Midcap ® 9/14 $10,000 $10,000 $10,000 10/14 $10,383 $10,275 $10,308 11/14 $10,538 $10,524 $10,572 12/14 $10,547 $10,524 $10,594 1/15 $10,364 $10,231 $10,429 2/15 $11,262 $10,824 $11,006 3/15 $11,420 $10,713 $11,013 4/15 $11,242 $10,762 $10,913 5/15 $11,355 $10,911 $11,073 6/15 $11,396 $10,728 $10,844 7/15 $11,416 $10,908 $10,924 8/15 $10,640 $10,249 $10,348 9/15 $10,409 $9,951 $9,975 10/15 $10,823 $10,736 $10,594 11/15 $10,636 $10,796 $10,621 12/15 $10,073 $10,574 $10,336 1/16 $9,593 $9,978 $9,659 2/16 $9,630 $9,975 $9,768 3/16 $10,319 $10,677 $10,568 4/16 $9,963 $10,743 $10,680 5/16 $10,064 $10,935 $10,855 6/16 $9,967 $10,958 $10,904 7/16 $10,212 $11,393 $11,402 8/16 $10,235 $11,422 $11,374 9/16 $10,111 $11,440 $11,397 10/16 $9,926 $11,192 $11,035 11/16 $10,462 $11,693 $11,630 12/16 $10,636 $11,921 $11,762 1/17 $10,710 $12,145 $12,046 2/17 $10,974 $12,597 $12,387 3/17 $10,928 $12,606 $12,368 4/17 $10,997 $12,739 $12,463 5/17 $11,127 $12,870 $12,577 6/17 $11,150 $12,986 $12,702 7/17 $11,242 $13,231 $12,889 8/17 $11,085 $13,256 $12,789 9/17 $11,353 $13,579 $13,143 10/17 $11,450 $13,876 $13,362 11/17 $11,691 $14,297 $13,812 12/17 $11,793 $14,440 $13,940 1/18 $12,187 $15,201 $14,465 2/18 $11,724 $14,641 $13,868 3/18 $11,803 $14,347 $13,876 4/18 $11,893 $14,402 $13,855 5/18 $12,240 $14,808 $14,170 6/18 $12,350 $14,905 $14,267 7/18 $12,655 $15,400 $14,623 8/18 $12,987 $15,940 $15,077 9/18 $12,966 $15,967 $14,980 10/18 $11,971 $14,791 $13,736 11/18 $12,377 $15,087 $14,073 12/18 $11,193 $13,683 $12,678 1/19 $12,132 $14,858 $14,045 2/19 $12,718 $15,380 $14,648 3/19 $12,816 $15,605 $14,774 4/19 $13,317 $16,228 $15,336 5/19 $12,707 $15,178 $14,395 6/19 $13,478 $16,244 $15,384 7/19 $13,875 $16,485 $15,603 8/19 $13,680 $16,149 $15,159 9/19 $13,714 $16,433 $15,458 10/19 $13,720 $16,786 $15,620 11/19 $14,221 $17,424 $16,178 12/19 $14,509 $17,928 $16,550 1/20 $14,564 $17,908 $16,417 2/20 $13,324 $16,442 $14,991 3/20 $11,066 $14,181 $12,069 4/20 $12,269 $16,059 $13,803 5/20 $12,846 $16,918 $14,773 6/20 $13,001 $17,304 $15,039 7/20 $13,733 $18,287 $15,922 8/20 $14,273 $19,612 $16,482 9/20 $14,043 $18,898 $16,161 10/20 $14,068 $18,490 $16,264 11/20 $15,395 $20,739 $18,512 12/20 $16,082 $21,672 $19,380 1/21 $15,774 $21,576 $19,328 2/21 $16,510 $22,250 $20,405 3/21 $16,830 $23,048 $20,957 4/21 $17,509 $24,236 $22,025 5/21 $17,559 $24,346 $22,202 6/21 $17,654 $24,947 $22,529 7/21 $17,798 $25,369 $22,702 8/21 $18,207 $26,092 $23,279 9/21 $17,302 $24,921 $22,320 10/21 $17,999 $26,607 $23,648 11/21 $17,415 $26,202 $22,824 12/21 $18,306 $27,234 $23,756 1/22 $16,679 $25,631 $22,006 2/22 $16,702 $24,986 $21,848 3/22 $17,036 $25,796 $22,407 4/22 $15,743 $23,481 $20,681 5/22 $15,508 $23,450 $20,698 6/22 $14,222 $21,488 $18,632 7/22 $15,538 $23,504 $20,471 8/22 $14,694 $22,627 $19,829 9/22 $13,386 $20,528 $17,991 10/22 $14,344 $22,212 $19,588 11/22 $15,188 $23,371 $20,765 12/22 $14,595 $22,003 $19,643 1/23 $15,728 $23,518 $21,274 2/23 $15,325 $22,968 $20,758 3/23 $15,348 $23,583 $20,440 4/23 $15,363 $23,834 $20,332 5/23 $14,861 $23,927 $19,764 6/23 $15,698 $25,560 $21,413 7/23 $16,086 $26,477 $22,262 8/23 $15,576 $25,966 $21,490 9/23 $14,625 $24,729 $20,410 10/23 $13,971 $24,073 $19,391 11/23 $15,363 $26,318 $21,375 12/23 $16,146 $27,714 $23,027 1/24 $15,949 $28,021 $22,699 2/24 $16,641 $29,538 $23,967 3/24 $17,219 $30,491 $25,007 4/24 $16,260 $29,149 $23,656 5/24 $16,694 $30,526 $24,331 6/24 $16,572 $31,471 $24,170 7/24 $17,295 $32,056 $25,309 8/24 $17,804 $32,754 $25,822 9/24 $18,226 $33,432 $26,396 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class C 22.78% 5.53% 6.18% Class C with 1% Maximum Deferred Sales Charge 21.78% 5.53% 6.18% Russell 3000 ® Index Footnote Reference 35.19% 15.25% 12.82% Russell Midcap ® 29.33% 11.28% 10.18% | |
AssetsNet | $ 235,021,560 | |
Holdings Count | Holding | 60 | |
Advisory Fees Paid, Amount | $ 1,345,606 | |
InvestmentCompanyPortfolioTurnover | 26% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $235,021,560 # of Portfolio Holdings 60 Portfolio Turnover Rate 26% Total Advisory Fees Paid $1,345,606 | |
Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Short-Term Investments 3.7% Consumer Staples 4.6% Utilities 4.9% Materials 5.8% Real Estate 8.7% Health Care 10.8% Information Technology 12.1% Financials 15.0% Consumer Discretionary 15.0% Industrials 19.4% Top Ten Holdings (% of total investments) Footnote Reference AptarGroup, Inc. 3.5% Motorola Solutions, Inc. 3.4% Tradeweb Markets, Inc., Class A 3.0% Dorman Products, Inc. 2.8% Lamar Advertising Co., Class A 2.7% Cooper Cos., Inc. 2.7% Equity LifeStyle Properties, Inc. 2.6% Copart, Inc. 2.6% AMETEK, Inc. 2.5% CMS Energy Corp. 2.5% Total 28.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |
C000023783 | | |
Shareholder Report [Line Items] | | |
Fund Name | Calvert Mid-Cap Fund | |
Class Name | Class I | |
Trading Symbol | CCPIX | |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Calvert Mid-Cap Fund for the period of October 1, 2023 to September 30, 2024. | |
Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
Additional Information [Text Block] | You can find additional information about the Fund at www.eatonvance.com/calvert-fund-documents.php | |
Additional Information Phone Number | 1-800-368-2745 | |
Additional Information Website | www.eatonvance.com/calvert-fund-documents.php</span>" id="sjs-B437"><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/calvert-fund-documents.php</span> | |
Expenses [Text Block] | What were the Fund costs for the last year? (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 $104 0.93% | |
Expenses Paid, Amount | $ 104 | |
Expense Ratio, Percent | 0.93% | |
Factors Affecting Performance [Text Block] | How did the Fund perform last year and what affected its performance? Key contributors to (↑) and detractors from (↓) performance, relative to the Russell Midcap ® ↓ Rentokil Initial Plc., a pest control and hygiene services provider, detracted from relative returns on challenges related to its 2022 acquisition of Terminix ↓ VeriSign, Inc., a provider of domain registration and internet services, hurt returns as Chinese registrations fell and its prospects disappointed investors ↓ Aptiv, a provider of auto industry electronics, detracted from returns on lower new car production volumes. The stock was sold by period-end ↓ Envista Holdings Corp., a provider of dental equipment, detracted from Index-relative returns on lower revenues and demand. The stock was sold by period-end ↑ Core & Main, Inc. ― a wastewater, storm drainage, and fire protection equipment distributor ― contributed to returns on better-than-expected sales and earnings ↑ Motorola Solutions, Inc., an information technology business, contributed to returns on record cash flows, and double-digit revenue and earnings growth ↑ Lamar Advertising Co., an outdoor advertising business, contributed to performance supported by robust demand from local and regional advertisers ↑ Trex Company, Inc., a composite deck maker, helped returns on strong revenue and margins growth during the first half of the period. Trex was sold by period-end | |
Performance Past Does Not Indicate Future [Text] | THE FUND'S PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. | |
Line Graph [Table Text Block] | Class I Russell 3000 ® Russell Midcap ® 9/14 $1,000,000 $1,000,000 $1,000,000 10/14 $1,039,573 $1,027,513 $1,030,820 11/14 $1,056,324 $1,052,414 $1,057,197 12/14 $1,058,317 $1,052,402 $1,059,436 1/15 $1,041,122 $1,023,112 $1,042,905 2/15 $1,132,088 $1,082,351 $1,100,647 3/15 $1,149,838 $1,071,348 $1,101,305 4/15 $1,132,938 $1,076,194 $1,091,296 5/15 $1,145,704 $1,091,079 $1,107,282 6/15 $1,151,241 $1,072,825 $1,084,382 7/15 $1,154,867 $1,090,768 $1,092,425 8/15 $1,077,471 $1,024,919 $1,034,778 9/15 $1,055,282 $995,053 $997,523 10/15 $1,098,816 $1,073,648 $1,059,366 11/15 $1,081,076 $1,079,600 $1,062,065 12/15 $1,024,616 $1,057,440 $1,033,601 1/16 $976,925 $997,774 $965,878 2/16 $981,443 $997,453 $976,795 3/16 $1,052,999 $1,067,679 $1,056,801 4/16 $1,017,687 $1,074,296 $1,067,973 5/16 $1,029,166 $1,093,516 $1,085,487 6/16 $1,020,105 $1,095,764 $1,090,431 7/16 $1,046,386 $1,139,252 $1,140,215 8/16 $1,050,020 $1,142,158 $1,137,367 9/16 $1,037,938 $1,143,953 $1,139,665 10/16 $1,019,835 $1,119,203 $1,103,500 11/16 $1,075,978 $1,169,290 $1,163,010 12/16 $1,094,645 $1,192,107 $1,176,220 1/17 $1,103,459 $1,214,544 $1,204,605 2/17 $1,131,784 $1,259,715 $1,238,692 3/17 $1,127,504 $1,260,572 $1,236,756 4/17 $1,136,024 $1,273,934 $1,246,282 5/17 $1,150,314 $1,286,971 $1,257,666 6/17 $1,153,662 $1,298,586 $1,270,176 7/17 $1,164,615 $1,323,070 $1,288,878 8/17 $1,149,096 $1,325,620 $1,278,861 9/17 $1,178,322 $1,357,949 $1,314,297 10/17 $1,189,293 $1,387,582 $1,336,228 11/17 $1,215,495 $1,429,716 $1,381,189 12/17 $1,227,567 $1,444,006 $1,394,030 1/18 $1,269,735 $1,520,120 $1,446,509 2/18 $1,222,551 $1,464,089 $1,386,759 3/18 $1,231,872 $1,434,699 $1,387,619 4/18 $1,242,479 $1,440,152 $1,385,506 5/18 $1,279,686 $1,480,808 $1,416,954 6/18 $1,292,981 $1,490,492 $1,426,736 7/18 $1,326,187 $1,539,955 $1,462,281 8/18 $1,361,734 $1,594,035 $1,507,701 9/18 $1,360,724 $1,596,674 $1,498,039 10/18 $1,257,759 $1,479,106 $1,373,576 11/18 $1,301,594 $1,508,731 $1,407,337 12/18 $1,178,356 $1,368,314 $1,267,757 1/19 $1,278,098 $1,485,762 $1,404,513 2/19 $1,340,860 $1,538,015 $1,464,842 3/19 $1,352,486 $1,560,473 $1,477,398 4/19 $1,406,414 $1,622,785 $1,533,615 5/19 $1,343,338 $1,517,772 $1,439,505 6/19 $1,425,477 $1,624,375 $1,538,381 7/19 $1,468,834 $1,648,522 $1,560,347 8/19 $1,449,442 $1,614,916 $1,515,904 9/19 $1,454,021 $1,643,259 $1,545,758 10/19 $1,456,110 $1,678,633 $1,562,012 11/19 $1,510,732 $1,742,441 $1,617,836 12/19 $1,542,647 $1,792,752 $1,654,954 1/20 $1,550,044 $1,790,794 $1,641,688 2/20 $1,419,068 $1,644,176 $1,499,089 3/20 $1,179,972 $1,418,072 $1,206,937 4/20 $1,309,132 $1,605,882 $1,380,275 5/20 $1,371,494 $1,691,762 $1,477,308 6/20 $1,389,184 $1,730,439 $1,503,923 7/20 $1,468,489 $1,828,699 $1,592,234 8/20 $1,527,916 $1,961,178 $1,648,216 9/20 $1,504,316 $1,889,770 $1,616,127 10/20 $1,508,754 $1,848,982 $1,626,430 11/20 $1,652,296 $2,073,917 $1,851,236 12/20 $1,726,936 $2,167,218 $1,937,966 1/21 $1,695,285 $2,157,579 $1,932,840 2/21 $1,775,749 $2,225,019 $2,040,483 3/21 $1,811,888 $2,304,770 $2,095,697 4/21 $1,886,382 $2,423,579 $2,202,504 5/21 $1,893,414 $2,434,642 $2,220,180 6/21 $1,905,360 $2,494,678 $2,252,858 7/21 $1,922,518 $2,536,865 $2,270,190 8/21 $1,968,319 $2,609,210 $2,327,904 9/21 $1,872,249 $2,492,141 $2,231,997 10/21 $1,948,956 $2,660,670 $2,364,755 11/21 $1,887,888 $2,620,172 $2,282,414 12/21 $1,985,655 $2,723,350 $2,375,637 1/22 $1,810,146 $2,563,119 $2,200,622 2/22 $1,814,285 $2,498,556 $2,184,795 3/22 $1,851,953 $2,579,600 $2,240,744 4/22 $1,712,871 $2,348,100 $2,068,131 5/22 $1,688,862 $2,344,952 $2,069,779 6/22 $1,549,780 $2,148,777 $1,863,199 7/22 $1,695,071 $2,350,370 $2,047,122 8/22 $1,604,005 $2,262,656 $1,982,899 9/22 $1,462,853 $2,052,842 $1,799,123 10/22 $1,568,407 $2,221,188 $1,958,801 11/22 $1,662,370 $2,337,125 $2,076,519 12/22 $1,598,904 $2,200,278 $1,964,293 1/23 $1,724,195 $2,351,818 $2,127,413 2/23 $1,681,048 $2,296,849 $2,075,814 3/23 $1,685,197 $2,358,265 $2,043,959 4/23 $1,688,931 $2,383,391 $2,033,164 5/23 $1,634,583 $2,392,664 $1,976,356 6/23 $1,727,929 $2,556,048 $2,141,271 7/23 $1,771,905 $2,647,674 $2,226,212 8/23 $1,717,557 $2,596,564 $2,148,998 9/23 $1,614,255 $2,472,879 $2,041,033 10/23 $1,543,312 $2,407,326 $1,939,085 11/23 $1,698,473 $2,631,805 $2,137,469 12/23 $1,786,351 $2,771,401 $2,302,685 1/24 $1,766,406 $2,802,116 $2,269,896 2/24 $1,843,694 $2,953,796 $2,396,713 3/24 $1,910,178 $3,049,077 $2,500,700 4/24 $1,805,050 $2,914,913 $2,365,617 5/24 $1,854,498 $3,052,634 $2,433,087 6/24 $1,842,863 $3,147,135 $2,416,970 7/24 $1,924,306 $3,205,637 $2,530,881 8/24 $1,982,896 $3,275,420 $2,582,162 9/24 $2,001,110 $3,343,175 $2,639,634 | |
Average Annual Return [Table Text Block] | Fund 1 Year 5 Years 10 Years Class I 23.97% 6.59% 7.18% Russell 3000 ® Index Footnote Reference 35.19% 15.25% 12.82% Russell Midcap ® 29.33% 11.28% 10.18% | |
AssetsNet | $ 235,021,560 | |
Holdings Count | Holding | 60 | |
Advisory Fees Paid, Amount | $ 1,345,606 | |
InvestmentCompanyPortfolioTurnover | 26% | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $235,021,560 # of Portfolio Holdings 60 Portfolio Turnover Rate 26% Total Advisory Fees Paid $1,345,606 | |
Holdings [Text Block] | Sector Allocation (% of total investments) Value Value Short-Term Investments 3.7% Consumer Staples 4.6% Utilities 4.9% Materials 5.8% Real Estate 8.7% Health Care 10.8% Information Technology 12.1% Financials 15.0% Consumer Discretionary 15.0% Industrials 19.4% Top Ten Holdings (% of total investments) Footnote Reference AptarGroup, Inc. 3.5% Motorola Solutions, Inc. 3.4% Tradeweb Markets, Inc., Class A 3.0% Dorman Products, Inc. 2.8% Lamar Advertising Co., Class A 2.7% Cooper Cos., Inc. 2.7% Equity LifeStyle Properties, Inc. 2.6% Copart, Inc. 2.6% AMETEK, Inc. 2.5% CMS Energy Corp. 2.5% Total 28.3% Footnote Description Footnote a Excluding cash equivalents | |
Material Fund Change [Text Block] | | |
Updated Prospectus Phone Number | 1-800-368-2745 | |