| Shareholder Report | 12 Months Ended |
| Sep. 30, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | | |
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Datum One Series Trust | |
| Entity Central Index Key | 0001806095 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Sep. 30, 2024 | |
| Brandes International Small Cap Equity Fund - Class C | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Small Cap Equity Fund | |
| Class Name | Class C | |
| Trading Symbol | BINCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Small Cap Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Small Cap Equity Fund $ 2.07 % | |
| Expenses Paid, Amount | $ 251 | |
| Expense Ratio, Percent | 2.07% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BINCX - C - Share Summary of Results The net asset value of the Brandes International Small Cap Equity Fund (Class C Shares without Load) advanced 42.78% TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Food Products Communication Services TOP PERFORMANCE DETRACTORS India Health Care Electric Utilities | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Small Cap Equity Fund (Class C/BINCX) (with maximum sales charge)(1) 41.78 % 15.88 % 6.98 % Brandes International Small Cap Equity Fund (Class C/BINCX) (without sales charge)(1) 42.78 % 15.88 % 6.98 % MSCI ACWI ex USA Index(2) 25.35 % 7.59 % 5.22 % MSCI ACWI ex USA Small Cap Index(3) 23.25 % 8.21 % 6.08 % S&P Developed ex-U.S. Small Cap Index 21.43 % 6.18 % 5.49 % (1) The Class C shares’ average annual total return for the 10-year period assumes that Class C shares automatically converted to Class A shares 8 years after the start of the period. (2) Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. (3) Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Index to better align the Predecessor Fund's benchmark with the Fund's current portfolio objectives and composition. | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Index to better align the Predecessor Fund's benchmark with the Fund's current portfolio objectives and composition. | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 664,302,483 | |
| Holdings Count | Holding | 75 | |
| Advisory Fees Paid, Amount | $ 4,662,221 | |
| Investment Company, Portfolio Turnover | 36% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 75 Total advisory fees paid $ Portfolio turnover rate 36 % | |
| Holdings [Text Block] | Industry Industrials 24.89 % Financials 16.27 % Consumer Staples 13.94 % Health Care 12.43 % Communication Services 8.04 % Materials 6.23 % Consumer Discretionary 5.64 % Real Estate 4.24 % Utilities 2.55 % Technology 2.41 % Energy 2.02 % Other 1.59 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Small Cap Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a new ly Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 2.15% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 2.15% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Emerging Markets Value Fund - Class I | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Emerging Markets Value Fund | |
| Class Name | Class I | |
| Trading Symbol | BEMIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Emerging Markets Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Emerging Markets Value Fund $ 1.12 % | |
| Expenses Paid, Amount | $ 124 | |
| Expense Ratio, Percent | 1.12% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BEMIX - I - Share Summary of Results The net asset value of the Brandes Emerging Markets Value Fund (Class I Shares) increased 21.56% in the trailing twelve months ended September 30, 2024, underperforming the 26.05% return of the MSCI Emerging Markets Index and the 24.38% return of the MSCI Emerging Markets Value Index. Notable contributors included holdings in Brazil and South Korea. Meanwhile, allocation to China hurt relative returns, as did our underweights to Taiwan and India, as well as overweight to Mexico. From a sector standpoint, select holdings in industrials, financials, and communication services were standout performers. Conversely, TOP PERFORMANCE CONTRIBUTORS Industrials Banks Communication Services TOP PERFORMANCE DETRACTORS Mexico China India | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Emerging Markets Value Fund (Class I/BEMIX) 21.56 % 3.88 % 2.05 % MSCI Emerging Markets Index 26.05 % 5.75 % 4.02 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 690,085,310 | |
| Holdings Count | Holding | 62 | |
| Advisory Fees Paid, Amount | $ 6,434,034 | |
| Investment Company, Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 62 Total advisory fees paid $ Portfolio turnover rate 28 % | |
| Holdings [Text Block] | Industry Financials 23.68 % Technology 19.35 % Consumer Discretionary 14.69 % Industrials 10.51 % Communication Services 9.55 % Consumer Staples 9.26 % Real Estate 2.43 % Utilities 2.43 % Energy 2.36 % Materials 2.01 % Other 2.52 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Emerging Markets Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a new ly Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.12% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.12% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed cou There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Equity Fund - Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Equity Fund | |
| Class Name | Class A | |
| Trading Symbol | BIEAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Equity Fund $ 1.12 % | |
| Expenses Paid, Amount | $ 129 | |
| Expense Ratio, Percent | 1.12% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BIEAX - A - Share Summary of Results The net asset value of the Brandes International Equity Fund (Class A Shares without Load) advanced 29.73% in the trailing twelve months ended September 30, 2024, outperforming the 24.77% return of the MSCI EAFE Index, as well as outperforming the 23.14% return of the MSCI EAFE Value Index. Notable contributors included holdings in the United Kingdom, Germany, and Brazil. Meanwhile, allocations to France and Mexico weighed on relative returns, as did several holdings in Japan. From a sector standpoint, holdings in industrials, consumer staples, and financials were standout performers, along with holdings in information technology. Conversely, overweight to energy detracted from relative returns, as did allocations to real estate and consumer discretionary. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Banks Information Technology TOP PERFORMANCE DETRACTORS Mexico However Consumer Discretionary Overweight to Energy performing | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Equity Fund (Class A/BIEAX) (with maximum sales charge) 22.25 % 9.35 % 5.58 % Brandes International Equity Fund (Class A/BIEAX) (without sales charge) 29.73 % 10.66 % 6.20 % MSCI EAFE (Europe, Australasia and Far East) Index 24.77 % 8.20 % 5.71 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 965,606,765 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 5,952,441 | |
| Investment Company, Portfolio Turnover | 31% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 31 % | |
| Holdings [Text Block] | Industry Consumer Staples 19.19 % Health Care 16.66 % Consumer Discretionary 13.86 % Financials 12.29 % Industrials 10.37 % Technology 7.35 % Communication Services 7.26 % Energy 4.56 % Materials 3.34 % Short-Term Investments 2.26 % Other 2.29 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.20% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.20% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed the There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Small Cap Value Fund Class I | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Small Cap Value Fund | |
| Class Name | Class I | |
| Trading Symbol | BSCMX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Small Cap Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Small Cap Value Fund $ 0.90 % | |
| Expenses Paid, Amount | $ 102 | |
| Expense Ratio, Percent | 0.90% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BSCMX - I - Share Summary of Results The net asset value of the Brandes Small Cap Value Fund (Class I Shares) increased 26.94% in the trailing twelve months ended September 30, 2024, outperforming the 25.88% return of the Russell 2000 Value Index and slightly outperforming the 26.76% return of the broad Russell 2000 Index. Notable contributors were holdings in industrials, information technology, and materials. Meanwhile, allocations to consumer staples, energy, and health care detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Industrials Communications Equipment Materials TOP PERFORMANCE DETRACTORS Consumer Staples Energy Equipment & Services Health Care | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Small Cap Value Fund (Class I/BSCMX) 26.94 % 16.70 % 11.78 % Russell 3000 Index (1) 35.19 % 15.26 % 12.83 % Russell 2000 Index 26.76 % 9.39 % 8.78 % Russell 2000 Value Index 25.88 % 9.29 % 8.22 % (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the Russell 2000 Cap Index to the Russell 3000 Index in connection with new regulatory requirements. | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the Russell 2000 Cap Index to the Russell 3000 Index in connection with new regulatory requirements. | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 61,294,367 | |
| Holdings Count | Holding | 49 | |
| Advisory Fees Paid, Amount | $ 220,043 | |
| Investment Company, Portfolio Turnover | 38% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 49 Total advisory fees paid $ Portfolio turnover rate 38 % | |
| Holdings [Text Block] | Industry Industrials 38.93 % Health Care 15.21 % Technology 11.26 % Energy 7.33 % Consumer Staples 7.03 % Consumer Discretionary 5.78 % Financials 5.04 % Materials 4.65 % Utilities 2.33 % Other 3.42 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Small Cap Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.90% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectu s, brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.90% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectu s, brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent register ed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Emerging Markets Value Fund - Class C | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Emerging Markets Value Fund | |
| Class Name | Class C | |
| Trading Symbol | BEMCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Emerging Markets Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Emerging Markets Value Fund $ 2.08 % | |
| Expenses Paid, Amount | $ 229 | |
| Expense Ratio, Percent | 2.08% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BEMCX - C - Share Summary of Results The net asset value of the Brandes Emerging Markets Value Fund (Class C Shares, without Load) increased 20.53% in the trailing twelve months ended September 30, 2024, underperforming the 26.05% return of the MSCI Emerging Markets Index and the 24.38% return of the MSCI Emerging Markets Value Index. Notable contributors included holdings in Brazil and South Korea. Meanwhile, allocation to China hurt relative returns, as did our underweights to Taiwan and India, as well as overweight to Mexico. From a sector standpoint, select holdings in industrials, financials, and communication services were standout performers. Conversely, TOP PERFORMANCE CONTRIBUTORS Industrials Banks Communication Services TOP PERFORMANCE DETRACTORS Mexico China India | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Emerging Markets Value Fund (Class C/BEMCX) (with maximum sales charge) (1) 19.53 % 3.00 % 1.24 % Brandes Emerging Markets Value Fund (Class C/BEMCX) (without sales charge) (1) 20.53 % 3.00 % 1.24 % MSCI Emerging Markets Index 26.05 % 5.75 % 4.02 % (1) The Class C shares’ average annual total return for the 10-year period assumes that Class C shares automatically converted to Class A shares 8 years after the start of the period. | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 690,085,310 | |
| Holdings Count | Holding | 62 | |
| Advisory Fees Paid, Amount | $ 6,434,034 | |
| Investment Company, Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 62 Total advisory fees paid $ Portfolio turnover rate 28 % | |
| Holdings [Text Block] | Industry Financials 23.68 % Technology 19.35 % Consumer Discretionary 14.69 % Industrials 10.51 % Communication Services 9.55 % Consumer Staples 9.26 % Real Estate 2.43 % Utilities 2.43 % Energy 2.36 % Materials 2.01 % Other 2.52 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Emerging Markets Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 2.12% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 2.12% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche Predecessor There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Small Cap Value Fund Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Small Cap Value Fund | |
| Class Name | Class A | |
| Trading Symbol | BSCAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Small Cap Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Small Cap Value Fund $ 1.15 % | |
| Expenses Paid, Amount | $ 130 | |
| Expense Ratio, Percent | 1.15% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BSCAX - A - Share Summary of Results The net asset value of the Brandes Small Cap Value Fund (Class A Shares without Load) increased 26.59% in the trailing twelve months ended September 30, 2024, outperforming the 25.88% return of the Russell 2000 Value Index and slightly underperforming the 26.76% return of the broad Russell 2000 Index. Notable contributors were holdings in industrials, information technology, and materials. Meanwhile, allocations to consumer staples, energy, and health care detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Industrials Communications Equipment Materials TOP PERFORMANCE DETRACTORS Consumer Staples Energy Equipment & Services Health Care | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Small Cap Value Fund (Class A/BSCAX) (with maximum sales charge) 19.32 % 15.07 % 10.82 % Brandes Small Cap Value Fund (Class A/BSCAX) (without sales charge) 26.59 % 16.43 % 11.48 % Russell 3000 Index (1) 35.19 % 15.26 % 12.83 % Russell 2000 Index 26.76 % 9.39 % 8.78 % Russell 2000 Value Index 25.88 % 9.29 % 8.22 % (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the Russell 2000 Cap Index to the Russell 3000 Index in connection with new regulatory requirements. | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the Russell 2000 Cap Index to the Russell 3000 Index in connection with new regulatory requirements. | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 61,294,367 | |
| Holdings Count | Holding | 49 | |
| Advisory Fees Paid, Amount | $ 220,043 | |
| Investment Company, Portfolio Turnover | 38% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 49 Total advisory fees paid $ Portfolio turnover rate 38 % | |
| Holdings [Text Block] | Industry Industrials 38.93 % Health Care 15.21 % Technology 11.26 % Energy 7.33 % Consumer Staples 7.03 % Consumer Discretionary 5.78 % Financials 5.04 % Materials 4.65 % Utilities 2.33 % Other 3.42 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Small Cap Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.15% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.15% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Core Plus Fixed Income Fund - Class I | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Core Plus Fixed Income Fund | |
| Class Name | Class I | |
| Trading Symbol | BCPIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Core Plus Fixed Income Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Core Plus Fixed Income Fund $ 0.30 % | |
| Expenses Paid, Amount | $ 32 | |
| Expense Ratio, Percent | 0.30% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BCPIX - I - Share Summary of Results The net asset value of the Brandes Core Plus Fixed Income Fund (Class I Shares) increased 12.02% in the trailing twelve months ended September 30, 2024, outperforming the 11.57% return of the Bloomberg U.S. Aggregate Bond Index. From a sector standpoint, notable contributors were holdings in information technology, banks, and services whereas select holdings in wireless, telecom, and media detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Information Technology Banks Services Yield Curve Positionin Underweight Agency Mortgage-Backed Securities TOP PERFORMANCE DETRACTORS Telecom Media Overall Duration Positioning | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Core Plus Fixed Income Fund (Class I/BCPIX) 12.02 % 1.53 % 2.16 % Bloomberg U.S. Aggregate Bond Index 11.57 % 0.33 % 1.84 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 115,393,846 | |
| Holdings Count | Holding | 68 | |
| Advisory Fees Paid, Amount | $ 328,077 | |
| Investment Company, Portfolio Turnover | 25% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 68 Total advisory fees paid $ Portfolio turnover rate 25 % | |
| Holdings [Text Block] | Asset Type as % of Net Assets US Governments 64.93 % Corporate Bonds 25.15 % Federal and Federally Sponsored Credits 4.45 % Foreign Issuer Bonds 2.04 % Other 2.65 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Core Plus Fixed Income Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.30% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospe ctus, brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.30% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospe ctus, brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Small Cap Equity Fund - Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Small Cap Equity Fund | |
| Class Name | Class A | |
| Trading Symbol | BISAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Small Cap Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Small Cap Equity Fund $ 1.32 % | |
| Expenses Paid, Amount | $ 161 | |
| Expense Ratio, Percent | 1.32% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BISAX - A - Share Summary of Results The net asset value of the Brandes International Small Cap Equity Fund (Class A Shares without Load) advanced 43.93% TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Food Products Communication Services TOP PERFORMANCE DETRACTORS India Health Care Electric Utilities | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Small Cap Equity Fund (Class A/BISAX) (with maximum sales charge) 35.66 % 15.25 % 6.91 % Brandes International Small Cap Equity Fund (Class A/BISAX) (without sales charge) 43.93 % 16.63 % 7.55 % MSCI ACWI ex USA Index(1) 25.35 % 7.59 % 5.22 % MSCI ACWI ex USA Small Cap Index(2) 23.25 % 8.21 % 6.08 % S&P Developed ex-U.S. Small Cap Index 21.43 % 6.18 % 5.49 % (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. (2) Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Index | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. (2) Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Index | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 664,302,483 | |
| Holdings Count | Holding | 75 | |
| Advisory Fees Paid, Amount | $ 4,662,221 | |
| Investment Company, Portfolio Turnover | 36% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 75 Total advisory fees paid $ Portfolio turnover rate 36 % | |
| Holdings [Text Block] | Industry Industrials 24.89 % Financials 16.27 % Consumer Staples 13.94 % Health Care 12.43 % Communication Services 8.04 % Materials 6.23 % Consumer Discretionary 5.64 % Real Estate 4.24 % Utilities 2.55 % Technology 2.41 % Energy 2.02 % Other 1.59 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Small Cap Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.40% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.40% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Global Equity Fund - Class A [Member] | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Global Equity Fund | |
| Class Name | Class A | |
| Trading Symbol | BGEAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Global Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Global Equity Fund $ 1.25 % | |
| Expenses Paid, Amount | $ 143 | |
| Expense Ratio, Percent | 1.25% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BGEAX - A - Share Summary of Results The net asset value of the Brandes Global Equity Fund (Class A Shares without Load) increased 29.18% in the trailing twelve months ended September 30, 2024, underperforming the 32.43% return of the MSCI World Index, but outperforming the 27.18% return of the MSCI World Value Index. Notable contributors included holdings in the United Kingdom, Brazil, and Germany. Meanwhile, allocations to France, South Korea, and Mexico weighed on relative returns, as did our underweight to the United States. From a sector standpoint, holdings in industrials and financials were standout performers, whereas allocations to health care and communication services detracted from relative returns, as did our underweight to information technology. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Banks Materials TOP PERFORMANCE DETRACTORS Underweight to Information Technology Health Care Underweight to the United States | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Global Equity Fund (Class A/BGEAX) (with maximum sales charge) 21.76 % 10.81 % 6.61 % Brandes Global Equity Fund (Class A/BGEAX) (without sales charge) 29.18 % 12.13 % 7.25 % MSCI World Index 32.43 % 13.04 % 10.07 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 53,190,131 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 379,962 | |
| Investment Company, Portfolio Turnover | 20% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 20 % | |
| Holdings [Text Block] | Industry Financials 23.66 % Health Care 18.79 % Consumer Discretionary 11.46 % Industrials 9.69 % Technology 9.66 % Consumer Staples 6.97 % Energy 6.30 % Communication Services 5.67 % Materials 5.30 % Other 2.41 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Global Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.25% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.25% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became h There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Emerging Markets Value Fund - Class R6 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Emerging Markets Value Fund | |
| Class Name | Class R6 | |
| Trading Symbol | BEMRX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Emerging Markets Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Emerging Markets Value Fund $ 0.97 % | |
| Expenses Paid, Amount | $ 108 | |
| Expense Ratio, Percent | 0.97% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BEMRX - R6 - Share Summary of Results The net asset value of the Brandes Emerging Markets Value Fund (Class R6 Shares) increased 21.73% in the trailing twelve months ended September 30, 2024, underperforming the 26.05% return of the MSCI Emerging Markets Index and the 24.38% return of the MSCI Emerging Markets Value Index. Notable contributors included holdings in Brazil and South Korea. Meanwhile, allocation to China hurt relative returns, as did our underweights to Taiwan and India, as well as overweight to Mexico. From a sector standpoint, select holdings in industrials, financials, and communication services were standout performers. Conversely, TOP PERFORMANCE CONTRIBUTORS Industrials Banks Communication Services TOP PERFORMANCE DETRACTORS Mexico China India | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Emerging Markets Value Fund (Class R6/BEMRX) (1) 21.73 % 4.01 % 2.17 % MSCI Emerging Markets Index 26.05 % 5.75 % 4.02 % (1) Performance shown prior to July 11, 2016 for Class R6 shares reflects the performance of Class I shares adjusted to reflect Class R6 expenses. | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 690,085,310 | |
| Holdings Count | Holding | 62 | |
| Advisory Fees Paid, Amount | $ 6,434,034 | |
| Investment Company, Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 62 Total advisory fees paid $ Portfolio turnover rate 28 % | |
| Holdings [Text Block] | Industry Financials 23.68 % Technology 19.35 % Consumer Discretionary 14.69 % Industrials 10.51 % Communication Services 9.55 % Consumer Staples 9.26 % Real Estate 2.43 % Utilities 2.43 % Energy 2.36 % Materials 2.01 % Other 2.52 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Emerging Markets Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.97% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.97% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Small Cap Equity Fund - Class I | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Small Cap Equity Fund | |
| Class Name | Class I | |
| Trading Symbol | BISMX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Small Cap Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Small Cap Equity Fund $ 1.12 % | |
| Expenses Paid, Amount | $ 137 | |
| Expense Ratio, Percent | 1.12% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BISMX - I - Share Summary of Results The net asset value of the Brandes International Small Cap Equity Fund (Class I Shares) advanced 44.22% in the trailing twelve months ended September 30, 2024, outperforming the 23.25% return of the MSCI ACWI ex-USA Small Cap Index, as well as outperforming the 24.05% return of the MSCI ACWI ex-USA Small Cap Value Index. Notable contributors included holdings in the United Kingdom, Brazil, and Ireland. Meanwhile, holdings in Mexico weighed on relative returns, as did the lack of exposure to India. From a sector standpoint, holdings in industrials, consumer staples, and communication services were standout performers, whereas allocations to health care and utilities detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Food Products Communication Services TOP PERFORMANCE DETRACTORS India Health Care Electric Utilities | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Small Cap Equity Fund (Class I/BISMX) 44.22 % 16.88 % 7.76 % MSCI ACWI ex USA Index(1) 25.35 % 7.59 % 5.22 % MSCI ACWI ex USA Small Cap Index(2) 23.25 % 8.21 % 6.08 % S&P Developed ex-U.S. Small Cap Index 21.43 % 6.18 % 5.49 % (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. (2) Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Ind ex | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | (1) Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. (2) Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Ind ex | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 664,302,483 | |
| Holdings Count | Holding | 75 | |
| Advisory Fees Paid, Amount | $ 4,662,221 | |
| Investment Company, Portfolio Turnover | 36% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 75 Total advisory fees paid $ Portfolio turnover rate 36 % | |
| Holdings [Text Block] | Industry Industrials 24.89 % Financials 16.27 % Consumer Staples 13.94 % Health Care 12.43 % Communication Services 8.04 % Materials 6.23 % Consumer Discretionary 5.64 % Real Estate 4.24 % Utilities 2.55 % Technology 2.41 % Energy 2.02 % Other 1.59 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Small Cap Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.15% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.15% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Small Cap Value Fund Class R6 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Small Cap Value Fund | |
| Class Name | Class R6 | |
| Trading Symbol | BSCRX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Small Cap Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Small Cap Value Fund $ 0.72 % | |
| Expenses Paid, Amount | $ 82 | |
| Expense Ratio, Percent | 0.72% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BSCRX - R6 - Share Summary of Results The net asset value of the Brandes Small Cap Value Fund (Class R6 Shares) increased 27.14% in the trailing twelve months ended September 30, 2024, outperforming the 25.88% return of the Russell 2000 Value Index and slightly outperforming the 26.76% return of the broad Russell 2000 Index. Notable contributors were holdings in industrials, information technology, and materials. Meanwhile, allocations to consumer staples, energy, and health care detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Industrials Communications Equipment Materials TOP PERFORMANCE DETRACTORS Consumer Staples Energy Equipment & Services Health Care | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Small Cap Value Fund (Class R6/BSCRX) (1) 27.14 % 17.25 % 11.19 % Russell 3000 Index (2) 35.19 % 15.26 % 12.83 % Russell 2000 Index 26.76 % 9.39 % 8.78 % Russell 2000 Value Index 25.88 % 9.29 % 8.22 % (1) Performance shown prior to January 2, 2018 for Class R6 shares reflects the performance of Class I shares. The private investment fund was not registered under the Investment Company Act of 1940 (“1940 Act”)and was not subject to certain investment limitations, diversification requirements, and other restrictions imposed by the 1940 Act and the Internal Revenue Code of 1986, which, if applicable, may have adversely affected its performance. (2) Effective August 27, 2024, the Fund changed its broad-based securities market index from the Russell 2000 Cap Index to the Russell 3000 Index in connection with new regulatory requirements. | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | Effective August 27, 2024, the Fund changed its broad-based securities market index from the Russell 2000 Cap Index to the Russell 3000 Index in connection with new regulatory requirements. | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 61,294,367 | |
| Holdings Count | Holding | 49 | |
| Advisory Fees Paid, Amount | $ 220,043 | |
| Investment Company, Portfolio Turnover | 38% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 49 Total advisory fees paid $ Portfolio turnover rate 38 % | |
| Holdings [Text Block] | Industry Industrials 38.93 % Health Care 15.21 % Technology 11.26 % Energy 7.33 % Consumer Staples 7.03 % Consumer Discretionary 5.78 % Financials 5.04 % Materials 4.65 % Utilities 2.33 % Other 3.42 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Small Cap Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.72% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.72% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and Septemb er | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Global Equity Fund - Class I [Member] | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Global Equity Fund | |
| Class Name | Class I | |
| Trading Symbol | BGVIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Global Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Global Equity Fund $ 1.00 % | |
| Expenses Paid, Amount | $ 115 | |
| Expense Ratio, Percent | 1% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BGVIX - I - Share Summary of Results The net asset value of the Brandes Global Equity Fund (Class I Shares) increased 29.46% in the trailing twelve months ended September 30, 2024, underperforming the 32.43% return of the MSCI World Index, but outperforming the 27.18% return of the MSCI World Value Index. Notable contributors included holdings in the United Kingdom, Brazil, and Germany. Meanwhile, allocations to France, South Korea, and Mexico weighed on relative returns, as did our underweight to the United States. From a sector standpoint, holdings in industrials and financials were standout performers, whereas allocations to health care and communication services detracted from relative returns, as did our underweight to information technology. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Banks Materials TOP PERFORMANCE DETRACTORS Underweight to Information Technology Health Care Underweight to the United States | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Global Equity Fund (Class I/BGVIX) 29.46 % 12.41 % 7.51 % MSCI World Index 32.43 % 13.04 % 10.07 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 53,190,131 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 379,962 | |
| Investment Company, Portfolio Turnover | 20% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 20 % | |
| Holdings [Text Block] | Industry Financials 23.66 % Health Care 18.79 % Consumer Discretionary 11.46 % Industrials 9.69 % Technology 9.66 % Consumer Staples 6.97 % Energy 6.30 % Communication Services 5.67 % Materials 5.30 % Other 2.41 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Global Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.00% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information us, brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.00% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since September 30, 2023. For more complete information us, brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Separately Managed Account Reserve Trust - Fund Level | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Separately Managed Account Reserve Trust | |
| Class Name | Ticker | |
| Trading Symbol | SMARX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Separately Managed Account Reserve Trust (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Brandes Separately Managed Account Reserve Trust * $ 0.00 % * No expenses have been charged to the Brandes Separately Managed Account Reserve Trust (“SMART Fund”) over the period, as the SMART Fund participates in a wrap-fee program sponsored by investment advisors unaffiliated with the SMART Fund. | |
| Expenses Paid, Amount | $ 0 | [1] |
| Expense Ratio, Percent | 0% | [1] |
| Factors Affecting Performance [Text Block] | Management’s Discussion of F un Summary of Results The net asset value of the Brandes Separately Managed Account Reserve Trust increased 14.99% in the trailing twelve months ended September 30, 2024, outperforming the 11.57% return of the Bloomberg U.S. Aggregate Bond Index. From a sector standpoint, notable contributors were holdings in information technology, banks, and services whereas select holdings in wireless, telecom, and media detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Information Technology Banks Services Yield Curve Positioning Underweight Agency Mortgage-Backed Securities TOP PERFORMANCE DETRACTORS Telecom | Media Overall Duration Positioning | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Separately Managed Account Reserve Trust 14.99 % 2.66 % 3.32 % Bloomberg U.S. Aggregate Bond Index 11.57 % 0.33 % 1.84 % Bloomberg U.S. Intermediate Credit Bond Index 11.46 % 1.89 % 2.67 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 170,038,220 | |
| Holdings Count | Holding | 54 | |
| Advisory Fees Paid, Amount | $ 0 | |
| Investment Company, Portfolio Turnover | 32% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 54 Total advisory fees paid $ Portfolio turnover rate 32 % | |
| Holdings [Text Block] | Asset Type as % of Net Assets Corporate Bonds 51.83 % US Governments 32.95 % Foreign Issuer Bonds 5.42 % Federal and Federally Sponsored Credits 5.12 % Short-Term Investments 4.71 % Other 1.75 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Separately Managed Account Reserve Trust (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectu s, brandes.com/funds/regulatory-literature | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectu s, brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Equity Fund - Class I | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Equity Fund | |
| Class Name | Class I | |
| Trading Symbol | BIIEX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Equity Fund $ 0.85 % | |
| Expenses Paid, Amount | $ 98 | |
| Expense Ratio, Percent | 0.85% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BIIEX - I - Share Summary of Results The net asset value of the Brandes International Equity Fund (Class I Shares) advanced 30.12% in the trailing twelve months ended September 30, 2024, outperforming the 24.77% return of the MSCI EAFE Index, as well as outperforming the 23.14% return of the MSCI EAFE Value Index. Notable contributors included holdings in the United Kingdom, Germany, and Brazil. Meanwhile TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Banks Information Technology TOP PERFORMANCE DETRACTORS Mexico Consumer Discretionary Overweight to Energy | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Equity Fund (Class I/BIIEX) 30.12 % 10.97 % 6.45 % MSCI EAFE (Europe, Australasia and Far East) Index 24.77 % 8.20 % 5.71 % | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 965,606,765 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 5,952,441 | |
| Investment Company, Portfolio Turnover | 31% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 31 % | |
| Holdings [Text Block] | Industry Consumer Staples 19.19 % Health Care 16.66 % Consumer Discretionary 13.86 % Financials 12.29 % Industrials 10.37 % Technology 7.35 % Communication Services 7.26 % Energy 4.56 % Materials 3.34 % Short-Term Investments 2.26 % Other 2.29 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized Reorganization Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.85% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectu s, brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.85% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectu s, brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Global Equity Fund - Class C [Member] | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Global Equity Fund | |
| Class Name | Class C | |
| Trading Symbol | BGVCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Global Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Global Equity Fund $ 2.00 % | |
| Expenses Paid, Amount | $ 228 | |
| Expense Ratio, Percent | 2% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BGVCX - C - Share Summary of Results The net asset value of the Brandes Global Equity Fund (Class C Shares with o TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Banks Materials TOP PERFORMANCE DETRACTORS Underweight to Information Technology Health Care Underweight to the United States | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Global Equity Fund (Class C/BGVCX) (with maximum sales charge)(1) 27.19 % 11.29 % 6.61 % Brandes Global Equity Fund (Class C/BGVCX) (without sales charge)(1) 28.19 % 11.29 % 6.61 % MSCI World Index 32.43 % 13.04 % 10.07 % (1) The Class C shares’ average annual total return for the 10-year period assumes that Class C shares automatically converted to Class A shares 8 years after the start of the period. | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 53,190,131 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 379,962 | |
| Investment Company, Portfolio Turnover | 20% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 20 % | |
| Holdings [Text Block] | Industry Financials 23.66 % Health Care 18.79 % Consumer Discretionary 11.46 % Industrials 9.69 % Technology 9.66 % Consumer Staples 6.97 % Energy 6.30 % Communication Services 5.67 % Materials 5.30 % Other 2.41 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Global Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 2.00% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospe ctus, brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 2.00% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospe ctus, brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Core Plus Fixed Income Fund - Class R6 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Core Plus Fixed Income Fund | |
| Class Name | Class R6 | |
| Trading Symbol | BCPRX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Core Plus Fixed Income Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Core Plus Fixed Income Fund $ 0.30 % | |
| Expenses Paid, Amount | $ 32 | |
| Expense Ratio, Percent | 0.30% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BCPRX - R6 - Share Summary of Results The net asset value of the Brandes Core Plus Fixed Income Fund (Class R6 Shares) increased 12.04% in the trailing twelve months ended September 30, 2024, outperforming the 11.57% return of the Bloomberg U.S. Aggregate Bond Index. From a sector standpoint, notable contributors were holdings in information technology, banks, and services whereas select holdings in wireless, telecom, and media detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Information Technology Banks Services Yield Curve Positioning Underweight Agency Mortgage-Backed Securities TOP PERFORMANCE DETRACTORS Telecom Media Overall Duration Positioning | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Core Plus Fixed Income Fund (Class R6/BCPRX) (1) 12.04 % 2.23 % 2.68 % Bloomberg U.S. Aggregate Bond Index 11.57 % 0.33 % 1.84 % (1) Performance shown prior to October 10, 2017 for Class R6 shares reflects the performance of Class I shares adjusted to reflect Class R6 expenses. | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 115,393,846 | |
| Holdings Count | Holding | 68 | |
| Advisory Fees Paid, Amount | $ 328,077 | |
| Investment Company, Portfolio Turnover | 25% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 68 Total advisory fees paid $ Portfolio turnover rate 25 % | |
| Holdings [Text Block] | Asset Type as % of Net Assets US Governments 64.93 % Corporate Bonds 25.15 % Federal and Federally Sponsored Credits 4.45 % Foreign Issuer Bonds 2.04 % Other 2.65 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Core Plus Fixed Income Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.30% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.30% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and Septemb er | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Equity Fund - Class C | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Equity Fund | |
| Class Name | Class C | |
| Trading Symbol | BIECX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Equity Fund $ 1.87 % | |
| Expenses Paid, Amount | $ 214 | |
| Expense Ratio, Percent | 1.87% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BIECX - C - Share Summary of Results The net asset value of the Brandes International Equity Fund (Class C Shares without Load) advanced 28.80% in the trailing twelve months ended September 30, 2024, outperforming the 24.77% return of the MSCI EAFE Index, as well as outperforming the 23.14% return of the MSCI EAFE Value Index. Notable contributors included holdings in the United Kingdom, Germany, and Brazil. Meanwhile, allocations to France and Mexico weighed on relative returns, as did several holdings in Japan. From a sector standpoint, holdings in industrials, consumer staples, and financials were standout performers, along with holdings in information technology. Conversely, overweight to energy detracted from relative returns, as did allocations to real estate and consumer discretionary. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Both Banks Information Technolog TOP PERFORMANCE DETRACTORS Mexico Consumer Discretionary Overweight to Energy | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Equity Fund (Class C/BIECX) (with maximum sales charge)(1) 27.80 % 9.90 % 5.59 % Brandes International Equity Fund (Class C/BIECX) (without sales charge)(1) 28.80 % 9.90 % 5.59 % MSCI EAFE (Europe, Australasia and Far East) Index 24.77 % 8.20 % 5.71 % (1) The Class C shares’ average annual total return for the 10-year period assumes that Class C shares automatically converted to Class A shares 8 years after the start of the period. | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 965,606,765 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 5,952,441 | |
| Investment Company, Portfolio Turnover | 31% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 31 % | |
| Holdings [Text Block] | Industry Consumer Staples 19.19 % Health Care 16.66 % Consumer Discretionary 13.86 % Financials 12.29 % Industrials 10.37 % Technology 7.35 % Communication Services 7.26 % Energy 4.56 % Materials 3.34 % Short-Term Investments 2.26 % Other 2.29 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.95% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.95% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and Septemb er | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Core Plus Fixed Income Fund - Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Core Plus Fixed Income Fund | |
| Class Name | Class A | |
| Trading Symbol | BCPAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Core Plus Fixed Income Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Core Plus Fixed Income Fund $ 0.50 % | |
| Expenses Paid, Amount | $ 53 | |
| Expense Ratio, Percent | 0.50% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BCPAX - A - Share Summary of Results The net asset value of the Brandes Core Plus Fixed Income Fund (Class A Shares without Load) increased 11.88% in the trailing twelve months ended September 30, 2024, outperforming TOP PERFORMANCE CONTRIBUTORS Information Technology Banks Services Yield Curve Positioning Underweight Agency Mortgage-Backed Securities TOP PERFORMANCE DETRACTORS Telecom Media Overall Duration Positioning | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Core Plus Fixed Income Fund (Class A/BCPAX) (with maximum sales charge) 7.66 % 0.53 % 1.53 % Brandes Core Plus Fixed Income Fund (Class A/BCPAX) (without sales charge) 11.88 % 1.31 % 1.92 % Bloomberg U.S. Aggregate Bond Index 11.57 % 0.33 % 1.84 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 115,393,846 | |
| Holdings Count | Holding | 68 | |
| Advisory Fees Paid, Amount | $ 328,077 | |
| Investment Company, Portfolio Turnover | 25% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 68 Total advisory fees paid $ Portfolio turnover rate 25 % | |
| Holdings [Text Block] | Asset Type as % of Net Assets US Governments 64.93 % Corporate Bonds 25.15 % Federal and Federally Sponsored Credits 4.45 % Foreign Issuer Bonds 2.04 % Other 2.65 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Core Plus Fixed Income Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.50% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.50% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered the There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes Emerging Markets Value Fund - Class A | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes Emerging Markets Value Fund | |
| Class Name | Class A | |
| Trading Symbol | BEMAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes Emerging Markets Value Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes Emerging Markets Value Fund $ 1.32 % | |
| Expenses Paid, Amount | $ 146 | |
| Expense Ratio, Percent | 1.32% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BEMAX - A - Share Summary of Results The net asset value of the Brandes Emerging Markets Value Fund (Class A Shares, without Load) increased 21.38% in the trailing twelve months ended September 30, 2024, underperforming the 26.05% return of the MSCI Emerging Markets Index and the 24.38% return of the MSCI Emerging Markets Value Index. Notable contributors included holdings in Brazil and South Korea. Meanwhile, allocation to China hurt relative returns, as did our underweights to Taiwan and India, as well as overweight to Mexico. From a sector standpoint, select holdings in industrials, financials, and communication services were standout performers. Conversely, TOP PERFORMANCE CONTRIBUTORS Industrials Banks Communication Services TOP PERFORMANCE DETRACTORS Mexico China India | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes Emerging Markets Value Fund (Class A/BEMAX) (with maximum sales charge) 14.40 % 2.43 % 1.21 % Brandes Emerging Markets Value Fund (Class A/BEMAX) (without sales charge) 21.38 % 3.65 % 1.81 % MSCI Emerging Markets Index 26.05 % 5.75 % 4.02 % | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 690,085,310 | |
| Holdings Count | Holding | 62 | |
| Advisory Fees Paid, Amount | $ 6,434,034 | |
| Investment Company, Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 62 Total advisory fees paid $ Portfolio turnover rate 28 % | |
| Holdings [Text Block] | Industry Financials 23.68 % Technology 19.35 % Consumer Discretionary 14.69 % Industrials 10.51 % Communication Services 9.55 % Consumer Staples 9.26 % Real Estate 2.43 % Utilities 2.43 % Energy 2.36 % Materials 2.01 % Other 2.52 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes Emerging Markets Value Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.37% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.37% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent PricewaterhouseCoopers There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Equity Fund - Class R6 [Member] | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Equity Fund | |
| Class Name | Class R6 | |
| Trading Symbol | BIERX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Equity Fund $ 0.75 % | |
| Expenses Paid, Amount | $ 86 | |
| Expense Ratio, Percent | 0.75% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BIERX - R6 - Share Summary of Results The net asset value of the Brandes International Equity Fund (Class R6 Shares) advanced 30.30% in the trailing twelve months ended September 30, 2024, outperforming the 24.77% return of the MSCI EAFE Index, as well as outperforming the 23.14% return of the MSCI EAFE Value Index. Notable contributors included holdings in the United Kingdom, Germany, and Brazil. Meanwhile, allocations to France and Mexico weighed on relative returns, as did several holdings in Japan. From a sector standpoint, holdings in industrials, consumer staples, and financials were standout performers, along with holdings in information technology. Conversely, overweight to energy detracted from relative returns, as did allocations to real estate and consumer discretionary. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Banks Information Technology TOP PERFORMANCE DETRACTORS Mexico Consumer Discretionary Overweight to Energy | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Equity Fund (Class R6/BIERX) (1) 30.30 % 11.08 % 6.57 % MSCI EAFE (Europe, Australasia and Far East) Index 24.77 % 8.20 % 5.71 % (1) Performance shown prior to February 1, 2016 for Class R6 shares reflects the performance of Class I shares adjusted to reflect Class R6 expenses. | |
| 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 | Aug. 05, 2024 | |
| Net Assets | $ 965,606,765 | |
| Holdings Count | Holding | 70 | |
| Advisory Fees Paid, Amount | $ 5,952,441 | |
| Investment Company, Portfolio Turnover | 31% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPTEMBER 30, 2024 Fund net assets $ Total number of portfolio holdings 70 Total advisory fees paid $ Portfolio turnover rate 31 % | |
| Holdings [Text Block] | Industry Consumer Staples 19.19 % Health Care 16.66 % Consumer Discretionary 13.86 % Financials 12.29 % Industrials 10.37 % Technology 7.35 % Communication Services 7.26 % Energy 4.56 % Materials 3.34 % Short-Term Investments 2.26 % Other 2.29 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.75% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 0.75% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“ Deloitte There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
| Brandes International Small Cap Equity Fund - Class R6 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Brandes International Small Cap Equity Fund | |
| Class Name | Class R6 | |
| Trading Symbol | BISRX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Brandes International Small Cap Equity Fund (the “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 brandes.com/funds/regulatory-literature | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 1-800-395-3807 | |
| Additional Information Website | brandes.com/funds/regulatory-literature | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 Investment Costs paid as a percentage of a $10,000 investment Brandes International Small Cap Equity Fund $ 1.00 % | |
| Expenses Paid, Amount | $ 122 | |
| Expense Ratio, Percent | 1% | |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance - BISRX - R6 - Share Summary of Results The net asset value of the Brandes International Small Cap Equity Fund (Class R6 Shares) advanced 44.39% in the trailing twelve months ended September 30, 2024, outperforming the 23.25% return of the MSCI ACWI ex-USA Small Cap Index, as well as outperforming the 24.05% return of the MSCI ACWI ex-USA Small Cap Value Index. Notable contributors included holdings in the United Kingdom, Brazil, and Ireland. Meanwhile, holdings in Mexico weighed on relative returns, as did the lack of exposure to India. From a sector standpoint, holdings in industrials, consumer staples, and communication services were standout performers, whereas allocations to health care and utilities detracted from relative returns. TOP PERFORMANCE CONTRIBUTORS Aerospace & Defense Food Products Communication Services TOP PERFORMANCE DETRACTORS India Health Care Electric Utilities | |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of the Fund’s future performance. | |
| Line Graph [Table Text Block] | | |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS 1 Year 5 Year 10 Year Brandes International Small Cap Equity Fund (Class R6/BISRX)(1) 44.39 % 17.01 % 7.88 % MSCI ACWI ex USA Index(2) 25.35 % 7.59 % 5.22 % MSCI ACWI ex USA Small Cap Index(3) 23.25 % 8.21 % 6.08 % S&P Developed ex-U.S. Small Cap Index 21.43 % 6.18 % 5.49 % (1) Performance shown prior to June 27, 2016 for Class R6 shares reflects the performance of Class I shares adjusted to reflect Class R6 expenses. (2) Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. (3) Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Index to better align the Predecessor Fund's benchmark with the Fund's current portfolio objectives and composition. | |
| 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. | |
| Performance Table Market Index Changed [Text Block] | Effective August 27, 2024, the Fund changed its broad-based securities market index from the MSCI ACWI ex USA Small Cap Index to the MSCI ACWI Ex-USA Index in connection with new regulatory requirements. Effective January 28, 2024, the benchmark for the Predecessor Fund changed from the S&P Developed ex-U.S. Small Cap Index to the MSCI ACWI ex USA Small Cap Index to better align the Predecessor Fund's benchmark with the Fund's current portfolio objectives and composition. | |
| Material Change Date | Aug. 05, 2024 | |
| Net Assets | $ 664,302,483 | |
| Holdings Count | Holding | 75 | |
| Advisory Fees Paid, Amount | $ 4,662,221 | |
| Investment Company, Portfolio Turnover | 36% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS AS OF SEPT EMBE Fund net assets $ Total number of portfolio holdings 75 Total advisory fees paid $ Portfolio turnover rate 36 % | |
| Holdings [Text Block] | Industry Industrials 24.89 % Financials 16.27 % Consumer Staples 13.94 % Health Care 12.43 % Communication Services 8.04 % Materials 6.23 % Consumer Discretionary 5.64 % Real Estate 4.24 % Utilities 2.55 % Technology 2.41 % Energy 2.02 % Other 1.59 % | |
| Material Fund Change [Text Block] | Material Fund Changes The Brandes International Small Cap Equity Fund (the "Predecessor Fund") a series of Brandes Investment Trust, reorganized into the Fund, a newly established series of Datum One Series Trust, effective August 5, 2024 (the “Reorganization”). Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.00% of average daily net assets through July 15, 2025. This is a summary of certain changes to the Fund since September 30, 2023. For more complete information, you may review the Fund’s prospectus, at brandes.com/funds/regulatory-literature | |
| Material Fund Change Expenses [Text Block] | In addition, Brandes Investment Partners, L.P. contractually agreed to limit fund operating expense to 1.00% of average daily net assets through July 15, 2025. | |
| Material Fund Change Adviser [Text Block] | Brandes Investment Partners, L.P., investment adviser to the Predecessor Fund, is also the adviser to the Fund. | |
| 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 prospectus, at brandes.com/funds/regulatory-literature | |
| Updated Prospectus Phone Number | 1-800-395-3807 | |
| Updated Prospectus Web Address | brandes.com/funds/regulatory-literature | |
| Accountant Change Statement [Text Block] | Changes in and Disagreements with Accountants Starting August 5, 2024, in connection with the Reorganization noted above, Deloitte & Touche LLP (“Deloitte”) became the independent registered public accounting firm of the Fund and PricewaterhouseCoopers LLP was dismissed There were no disagreements with the former accounting firm during the Predecessor Fund's fiscal years ended September 30, 2022 and September 30, 2023, or for the period from October 1, 2023 through August 5, 2024. | |
| Accountant Change Date | Aug. 05, 2024 | |
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| [1]No expenses have been charged to the Brandes Separately Managed Account Reserve Trust (“SMART Fund”) over the period, as the SMART Fund participates in a wrap-fee program sponsored by investment advisors unaffiliated with the SMART Fund. |
