| Form N-CSR Cover | 12 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | COMMONWEALTH INTERNATIONAL SERIES TRUST |
| Entity Central Index Key | 0000793601 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Oct. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | COMMONWEALTH INTERNATIONAL SERIES TRUST |
| Entity Central Index Key | 0000793601 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| C000012360 | |
| Shareholder Report [Line Items] | |
| Fund Name | Commonwealth Australia/New Zealand Fund |
| Trading Symbol | CNZLX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Commonwealth Australia/New Zealand Fund for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://funddocs.filepoint.com/commonwealth/ |
| Additional Information Phone Number | (888) 345-1898 |
| Additional Information Website | https://funddocs.filepoint.com/commonwealth/ |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Commonwealth Australia/New Zealand Fund $301 2.86% |
| Expenses Paid, Amount | $ 301 |
| Expense Ratio, Percent | 2.86% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Commonwealth Australia/New Zealand Fund Australian All Ordinaries Index MSCI ACWI ex USA Index NZX 50 Index Oct-2014 $10,000 $10,000 $10,000 $9,998 Oct-2015 $8,985 $8,290 $9,532 $9,675 Oct-2016 $11,008 $9,544 $9,554 $11,867 Oct-2017 $11,915 $11,253 $11,812 $13,286 Oct-2018 $11,730 $10,859 $10,838 $13,598 Oct-2019 $12,486 $12,790 $12,060 $16,475 Oct-2020 $12,947 $12,303 $11,745 $19,029 Oct-2021 $17,119 $17,170 $15,228 $22,345 Oct-2022 $12,092 $14,315 $11,463 $15,721 Oct-2023 $10,786 $14,798 $12,847 $14,921 Oct-2024 $11,888 $19,435 $15,973 $17,964 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Commonwealth Australia/New Zealand Fund 10.22% - 1.74% Australian All Ordinaries Index 31.41% 8.72% 6.87% MSCI ACWI ex USA Index 24.33% 5.78% 4.79% NZX 50 Index 20.41% 1.75% 6.03% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Oct. 31, 2024 |
| AssetsNet | $ 12,018,064 |
| Holdings Count | Holding | 37 |
| Advisory Fees Paid, Amount | $ 89,975 |
| InvestmentCompanyPortfolioTurnover | 8% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $12,018,064 Number of Portfolio Holdings 37 Advisory Fee $89,975 Portfolio Turnover 8% |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Other Assets in Excess of Liabilities 6.9% Money Market Funds 0.8% Consumer Staples 2.3% Real Estate 2.5% Communications 4.7% Financials 5.4% Materials 6.0% Consumer Discretionary 7.3% Utilities 11.4% Health Care 16.3% Industrials 36.4% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended October 31, 2024. |
| C000105717 | |
| Shareholder Report [Line Items] | |
| Fund Name | Africa Fund |
| Trading Symbol | CAFRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Africa Fund for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://funddocs.filepoint.com/commonwealth/ |
| Additional Information Phone Number | (888) 345-1898 |
| Additional Information Website | https://funddocs.filepoint.com/commonwealth/ |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Africa Fund $207 1.75% |
| Expenses Paid, Amount | $ 207 |
| Expense Ratio, Percent | 1.75% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Africa Fund Dow Jones Africa Titans 50 Index MSCI Emerging Markets Index Oct-2014 $10,000 $10,000 $10,000 Oct-2015 $8,484 $7,510 $8,547 Oct-2016 $8,342 $8,020 $9,339 Oct-2017 $9,162 $8,833 $11,809 Oct-2018 $8,126 $7,982 $10,331 Oct-2019 $8,097 $8,764 $11,556 Oct-2020 $6,372 $8,098 $12,509 Oct-2021 $9,073 $9,685 $14,631 Oct-2022 $7,840 $7,416 $10,091 Oct-2023 $7,495 $7,561 $11,181 Oct-2024 $10,240 $9,547 $14,012 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Africa Fund 36.64% 4.81% 0.24% Dow Jones Africa Titans 50 Index 26.26% 1.72% - MSCI Emerging Markets Index 25.31% 3.93% 3.43% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Oct. 31, 2024 |
| AssetsNet | $ 3,978,618 |
| Holdings Count | Holding | 40 |
| Advisory Fees Paid, Amount | $ 0 |
| InvestmentCompanyPortfolioTurnover | 4% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $3,978,618 Number of Portfolio Holdings 40 Advisory Fee (net of waivers) $0 Portfolio Turnover 4% |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Other Assets in Excess of Liabilities 0.1% Money Market Funds 0.9% Health Care 2.0% Sovereign 2.3% Real Estate 2.8% Industrials 7.0% Communications 10.0% Consumer Staples 10.7% Consumer Discretionary 11.6% Materials 15.4% Financials 37.2% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended October 31, 2024. |
| C000012361 | |
| Shareholder Report [Line Items] | |
| Fund Name | Commonwealth Japan Fund |
| Trading Symbol | CNJFX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Commonwealth Japan Fund for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://funddocs.filepoint.com/commonwealth/ |
| Additional Information Phone Number | (888) 345-1898 |
| Additional Information Website | https://funddocs.filepoint.com/commonwealth/ |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Commonwealth Japan Fund $185 1.75% |
| Expenses Paid, Amount | $ 185 |
| Expense Ratio, Percent | 1.75% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Commonwealth Japan Fund Tokyo Stock Price Index Oct-2014 $10,000 $10,000 Oct-2015 $10,820 $11,058 Oct-2016 $11,082 $11,626 Oct-2017 $12,525 $13,896 Oct-2018 $12,000 $13,280 Oct-2019 $13,508 $14,443 Oct-2020 $13,213 $14,478 Oct-2021 $14,459 $17,190 Oct-2022 $10,354 $13,062 Oct-2023 $11,686 $15,347 Oct-2024 $12,964 $18,711 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Commonwealth Japan Fund 10.93% - 2.63% Tokyo Stock Price Index 21.92% 5.31% 6.47% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Oct. 31, 2024 |
| AssetsNet | $ 5,913,171 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| InvestmentCompanyPortfolioTurnover | 9% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $5,913,171 Number of Portfolio Holdings 48 Advisory Fee (net of waivers) $0 Portfolio Turnover 9% |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Other Assets in Excess of Liabilities 0.7% Money Market Funds 0.1% Communications 1.0% Energy 1.4% Utilities 2.0% Real Estate 3.3% Materials 4.2% Technology 8.2% Consumer Staples 11.3% Consumer Discretionary 11.7% Financials 13.4% Health Care 14.1% Industrials 28.6% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended October 31, 2024. |
| C000012362 | |
| Shareholder Report [Line Items] | |
| Fund Name | Commonwealth Global Fund |
| Trading Symbol | CNGLX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Commonwealth Global Fund for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://funddocs.filepoint.com/commonwealth/ |
| Additional Information Phone Number | (888) 345-1898 |
| Additional Information Website | https://funddocs.filepoint.com/commonwealth/ |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Commonwealth Global Fund $283 2.54% |
| Expenses Paid, Amount | $ 283 |
| Expense Ratio, Percent | 2.54% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Commonwealth Global Fund MSCI ACWI Net Oct-2014 $10,000 $10,000 Oct-2015 $9,058 $9,997 Oct-2016 $9,071 $10,201 Oct-2017 $10,395 $12,568 Oct-2018 $10,001 $12,503 Oct-2019 $10,759 $14,078 Oct-2020 $11,004 $14,766 Oct-2021 $14,345 $20,270 Oct-2022 $11,452 $16,225 Oct-2023 $11,624 $17,929 Oct-2024 $14,255 $23,808 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Commonwealth Global Fund 22.63% 5.79% 3.61% MSCI ACWI Net 32.79% 11.08% 9.06% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Oct. 31, 2024 |
| AssetsNet | $ 16,917,971 |
| Holdings Count | Holding | 46 |
| Advisory Fees Paid, Amount | $ 126,432 |
| InvestmentCompanyPortfolioTurnover | 4% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $16,917,971 Number of Portfolio Holdings 46 Advisory Fee $126,432 Portfolio Turnover 4% |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Money Market Funds 0.6% Utilities 0.8% Communications 2.8% Materials 2.9% Energy 6.0% Financials 7.8% Consumer Staples 11.6% Health Care 12.9% Consumer Discretionary 13.4% Industrials 14.6% Technology 26.6% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended October 31, 2024. |
| C000012363 | |
| Shareholder Report [Line Items] | |
| Fund Name | Commonwealth Real Estate Securities Fund |
| Trading Symbol | CNREX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Commonwealth Real Estate Securities Fund for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://funddocs.filepoint.com/commonwealth/ |
| Additional Information Phone Number | (888) 345-1898 |
| Additional Information Website | https://funddocs.filepoint.com/commonwealth/ |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Commonwealth Real Estate Securities Fund $303 2.54% |
| Expenses Paid, Amount | $ 303 |
| Expense Ratio, Percent | 2.54% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Commonwealth Real Estate Securities Fund MSCI US REIT Index Oct-2014 $10,000 $10,000 Oct-2015 $10,188 $10,532 Oct-2016 $10,196 $11,250 Oct-2017 $11,802 $11,875 Oct-2018 $10,898 $12,075 Oct-2019 $12,987 $14,929 Oct-2020 $11,504 $11,793 Oct-2021 $16,279 $17,889 Oct-2022 $12,843 $14,530 Oct-2023 $13,049 $13,671 Oct-2024 $18,054 $18,656 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Commonwealth Real Estate Securities Fund 38.35% 6.81% 6.09% MSCI US REIT Index 36.48% 4.56% 6.43% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Oct. 31, 2024 |
| AssetsNet | $ 16,831,887 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 115,635 |
| InvestmentCompanyPortfolioTurnover | 6% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $16,831,887 Number of Portfolio Holdings 45 Advisory Fee $115,635 Portfolio Turnover 6% |
| Holdings [Text Block] | Sector Weighting (% of net assets) Value Value Consumer Staples 0.6% Money Market Funds 2.1% Financials 4.6% U.S. Treasury Obligations 6.2% Industrials 12.5% Materials 17.5% Consumer Discretionary 18.1% Real Estate 38.4% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occurred during the year ended October 31, 2024. |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||
| Oct. 31, 2014 | Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015 | |
| C000012360 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Commonwealth Australia/New Zealand Fund | ||||||||||
| Account Value | $ 10,000 | $ 11,888 | $ 10,786 | $ 12,092 | $ 17,119 | $ 12,947 | $ 12,486 | $ 11,730 | $ 11,915 | $ 11,008 | $ 8,985 |
| C000105717 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Africa Fund | ||||||||||
| Account Value | $ 10,000 | 10,240 | 7,495 | 7,840 | 9,073 | 6,372 | 8,097 | 8,126 | 9,162 | 8,342 | 8,484 |
| C000012361 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Commonwealth Japan Fund | ||||||||||
| Account Value | $ 10,000 | 12,964 | 11,686 | 10,354 | 14,459 | 13,213 | 13,508 | 12,000 | 12,525 | 11,082 | 10,820 |
| C000012362 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Commonwealth Global Fund | ||||||||||
| Account Value | $ 10,000 | 14,255 | 11,624 | 11,452 | 14,345 | 11,004 | 10,759 | 10,001 | 10,395 | 9,071 | 9,058 |
| C000012363 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Commonwealth Real Estate Securities Fund | ||||||||||
| Account Value | $ 10,000 | 18,054 | 13,049 | 12,843 | 16,279 | 11,504 | 12,987 | 10,898 | 11,802 | 10,196 | 10,188 |
| MSCI ACWI ex USA Net (USD) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index | ||||||||||
| Account Value | $ 10,000 | 15,973 | 12,847 | 11,463 | 15,228 | 11,745 | 12,060 | 10,838 | 11,812 | 9,554 | 9,532 |
| MSCI EM (EMERGING MARKETS) Net (USD) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI Emerging Markets Index | ||||||||||
| Account Value | $ 10,000 | 14,012 | 11,181 | 10,091 | 14,631 | 12,509 | 11,556 | 10,331 | 11,809 | 9,339 | 8,547 |
| Tokyo Stock Price Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Tokyo Stock Price Index | ||||||||||
| Account Value | $ 10,000 | 18,711 | 15,347 | 13,062 | 17,190 | 14,478 | 14,443 | 13,280 | 13,896 | 11,626 | 11,058 |
| MSCI ACWI Net (USD) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI Net | ||||||||||
| Account Value | $ 10,000 | 23,808 | 17,929 | 16,225 | 20,270 | 14,766 | 14,078 | 12,503 | 12,568 | 10,201 | 9,997 |
| MSCI US REIT Gross (USD) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI US REIT Index | ||||||||||
| Account Value | $ 10,000 | 18,656 | 13,671 | 14,530 | 17,889 | 11,793 | 14,929 | 12,075 | 11,875 | 11,250 | 10,532 |
| Australian All Ordinaries Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Australian All Ordinaries Index | ||||||||||
| Account Value | $ 10,000 | 19,435 | 14,798 | 14,315 | 17,170 | 12,303 | 12,790 | 10,859 | 11,253 | 9,544 | 8,290 |
| NZX 50 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | NZX 50 Index | ||||||||||
| Account Value | $ 9,998 | 17,964 | 14,921 | 15,721 | 22,345 | 19,029 | 16,475 | 13,598 | 13,286 | 11,867 | 9,675 |
| Dow Jones Africa Titans 50 Index TR | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Dow Jones Africa Titans 50 Index | ||||||||||
| Account Value | $ 10,000 | $ 9,547 | $ 7,561 | $ 7,416 | $ 9,685 | $ 8,098 | $ 8,764 | $ 7,982 | $ 8,833 | $ 8,020 | $ 7,510 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended | |
| Oct. 31, 2024 | Oct. 31, 2014 | Oct. 31, 2024 | Oct. 31, 2024 | |
| C000012360 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Commonwealth Australia/New Zealand Fund | |||
| C000105717 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Africa Fund | |||
| C000012361 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Commonwealth Japan Fund | |||
| C000012362 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Commonwealth Global Fund | |||
| C000012363 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Commonwealth Real Estate Securities Fund | |||
| Without Sales Load [Member] | C000012360 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 10.22% | (0.98%) | 1.74% | |
| Without Sales Load [Member] | C000105717 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 36.64% | 4.81% | 0.24% | |
| Without Sales Load [Member] | C000012361 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 10.93% | (0.82%) | 2.63% | |
| Without Sales Load [Member] | C000012362 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 22.63% | 5.79% | 3.61% | |
| Without Sales Load [Member] | C000012363 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 38.35% | 6.81% | 6.09% | |
| MSCI ACWI ex USA Net (USD) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index | |||
| Average Annual Return, Percent | 24.33% | 5.78% | 4.79% | |
| MSCI EM (EMERGING MARKETS) Net (USD) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI Emerging Markets Index | |||
| Average Annual Return, Percent | 25.31% | 3.93% | 3.43% | |
| Tokyo Stock Price Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Tokyo Stock Price Index | |||
| Average Annual Return, Percent | 21.92% | 5.31% | 6.47% | |
| MSCI ACWI Net (USD) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI Net | |||
| Average Annual Return, Percent | 32.79% | 11.08% | 9.06% | |
| MSCI US REIT Gross (USD) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI US REIT Index | |||
| Average Annual Return, Percent | 36.48% | 4.56% | 6.43% | |
| Australian All Ordinaries Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Australian All Ordinaries Index | |||
| Average Annual Return, Percent | 31.41% | 8.72% | 6.87% | |
| NZX 50 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | NZX 50 Index | |||
| Average Annual Return, Percent | 20.41% | 1.75% | 6.03% | |
| Dow Jones Africa Titans 50 Index TR | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Dow Jones Africa Titans 50 Index | |||
| Average Annual Return, Percent | 26.26% | 1.72% | (0.46%) | |
| Shareholder Report, Holdings (Details) | Oct. 31, 2024 |
| C000012360 | 6825360 | South Port New Zealand Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| C000012360 | 6459286 | Infratil Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.80% |
| C000012360 | 6603038 | Mainfreight Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000012360 | 6687980 | Freightways Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000012360 | 6429728 | Briscoe Group Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000012360 | B1FJ0C0 | Brambles Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000012360 | 6185495 | CSL Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000012360 | 6532488 | Skellerup Holdings Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000012360 | 6087289 | Telstra Corp. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000012360 | B1L4BC6 | Qube Holdings Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000012360 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000012360 | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.70% |
| C000012360 | New Zealand | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59.60% |
| C000012360 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000012360 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000012360 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000012360 | Communications | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000012360 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000012360 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000012360 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000012360 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000012360 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.30% |
| C000012360 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.40% |
| C000105717 | 6440859 | Capitec Bank Holdings Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000105717 | BN0VX82 | Naspers Ltd., N Shares | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000105717 | 82510E209 | Shoprite Holdings Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000105717 | 38059T106 | Gold Fields Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000105717 | 853118206 | Standard Bank Group Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000105717 | B0LNLV5 | Grindrod Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000105717 | 6177878 | Discovery Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000105717 | 6662404 | Wilson Bayly Holmes-Ovcon Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000105717 | 6100089 | Bidvest Group Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000105717 | BK9S758 | Momentum Metropolitan Holdings | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000105717 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000105717 | Egypt | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| C000105717 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000105717 | South Africa | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 93.10% |
| C000105717 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000105717 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000105717 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000105717 | Communications | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000105717 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 37.20% |
| C000105717 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000105717 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000105717 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000105717 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| C000105717 | Sovereign | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000012361 | 6429104 | Hitachi Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000012361 | 6441506 | Hoya Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000012361 | 6885074 | Terumo Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000012361 | B019MQ5 | Asahi Intecc Co. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000012361 | 6481320 | Kajima Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000012361 | 6661144 | ORIX Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000012361 | 6575900 | Meidensha Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000012361 | B601QS4 | Dai-ichi Life Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000012361 | 6911485 | Unicharm Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000012361 | 6332439 | Fast Retailing Co. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000012361 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000012361 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 94.80% |
| C000012361 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000012361 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000012361 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000012361 | Communications | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000012361 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| C000012361 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000012361 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.70% |
| C000012361 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000012361 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.10% |
| C000012361 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000012361 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000012361 | Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000012362 | 398905109 | Group 1 Automotive, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000012362 | 037833100 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000012362 | 600551204 | Miller Industries, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000012362 | 64110D104 | NetApp, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000012362 | 883556102 | Thermo Fisher Scientific, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000012362 | 826197501 | Siemens AG | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000012362 | 594918104 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000012362 | 655844108 | Norfolk Southern Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000012362 | 046353108 | AstraZeneca PLC | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000012362 | 166764100 | Chevron Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000012362 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58% |
| C000012362 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| C000012362 | South Africa | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000012362 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000012362 | Mexico | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000012362 | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000012362 | Panama | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000012362 | Norway | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| C000012362 | Taiwan Province of China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000012362 | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000012362 | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000012362 | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000012362 | India | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000012362 | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000012362 | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000012362 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000012362 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000012362 | Communications | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000012362 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000012362 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000012362 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| C000012362 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000012362 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| C000012362 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.60% |
| C000012362 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000012362 | Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.60% |
| C000012363 | G87264100 | Tecnoglass, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000012363 | 526107107 | Lennox International, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000012363 | 46284V101 | Iron Mountain, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000012363 | 47030M106 | James Hardie Industries PLC | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000012363 | 548661107 | Lowe's Cos., Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000012363 | 45857P806 | InterContinental Hotels Group PLC | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000012363 | 23331A109 | D.R. Horton, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000012363 | 253868103 | Digital Realty Trust, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000012363 | 526057104 | Lennar Corp., Class A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000012363 | 03027X100 | American Tower Corp., Class A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000012363 | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 71.90% |
| C000012363 | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000012363 | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000012363 | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000012363 | Mexico | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000012363 | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000012363 | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000012363 | Hong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000012363 | Colombia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000012363 | Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| C000012363 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000012363 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 38.40% |
| C000012363 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000012363 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.50% |
| C000012363 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.10% |
| C000012363 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000012363 | U.S. Treasury Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
