| Form N-CSR Cover | 12 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | ALGER FUNDS II |
| Entity Central Index Key | 0000092751 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 12 Months Ended | |
| Oct. 31, 2024 USD ($) Holding | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | ALGER FUNDS II | |
| Entity Central Index Key | 0000092751 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Oct. 31, 2024 | |
| C000024978 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Spectra Fund | |
| Class Name | Class A | |
| Trading Symbol | SPECX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Spectra Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Spectra Fund $ 1.52 % | |
| Expenses Paid, Amount | $ 194 | |
| Expense Ratio, Percent | 1.52% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Spectra Fund Class A returned 55.61%, excluding sales load, for the fiscal twelve-month period ended October 31, 2024, compared to the 43.42% return of the Russell 3000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Communication Services. The largest sector overweight was Industrials and the largest sector underweight was Consumer Staples. Contributors to Performance The Information Technology and Health Care sectors provided the largest contributions to relative performance. NVIDIA Corp.; Meta Platforms Inc; Microsoft Corp.; Amazon.com, Inc.; and Natera, Inc. were the top five contributors to absolute performance. Detractors from Performance The Financials and Consumer Staples sectors were the largest detractors from relative performance. SPDR S&P 500 ETF Trust; Informatica, Inc.; Mobileye Global, Inc.; HubSpot, Inc.; and Edwards Lifesciences Corp. were among the top detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class A shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Spectra Fund Class A 47.43 % 13.34 % 12.67 % Alger Spectra Fund Class A—excluding sales load 55.61 % 14.58 % 13.28 % Russell 3000 Growth Index 43.42 % 18.34 % 15.66 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 3,458,761,839 | |
| Holdings Count | Holding | 76 | [1] |
| Advisory Fees Paid, Amount | $ 27,376,168 | |
| Investment Company Portfolio Turnover | 49.26% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 76 Portfolio turnover rate as of the end of the reporting period 49.26 % Total advisory fees paid $ Long portfolio exposure 108.1 % Short portfolio exposure (8.1 ) % Net portfolio exposure 100.0 % Cash 0.0 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 15.1 % Consumer Discretionary 14.6 % Consumer Staples (0.1 ) % Energy 0.5 % Exchange Traded Funds (1.5 ) % Financials 4.4 % Healthcare 7.6 % Industrials 10.1 % Information Technology 47.0 % Market Indices (1.2 ) % Materials 0.3 % Real Estate 1.5 % Utilities 1.7 % Short-Term Investments and Other Net Assets 0.0 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000068367 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Spectra Fund | |
| Class Name | Class C | |
| Trading Symbol | ASPCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Spectra Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Spectra Fund $ 2.25 % | |
| Expenses Paid, Amount | $ 286 | |
| Expense Ratio, Percent | 2.25% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Spectra Fund Class C returned 54.49%, excluding contingent deferred sales charge, for the fiscal twelve-month period ended October 31, 2024, compared to the 43.42% return of the Russell 3000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Communication Services. The largest sector overweight was Industrials and the largest sector underweight was Consumer Staples. Contributors to Performance The Information Technology and Health Care sectors provided the largest contributions to relative performance. NVIDIA Corp.; Meta Platforms Inc; Microsoft Corp.; Amazon.com, Inc.; and Natera, Inc. were the top five contributors to absolute performance. Detractors from Performance The Financials and Consumer Staples sectors were the largest detractors from relative performance. SPDR S&P 500 ETF Trust; Informatica, Inc.; Mobileye Global, Inc.; HubSpot, Inc.; and Edwards Lifesciences Corp. were among the top detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class C shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Spectra Fund Class C 53.49 % 13.71 % 12.60 % Alger Spectra Fund Class C—excluding contingent deferred sales charges 54.49 % 13.71 % 12.60 % Russell 3000 Growth Index 43.42 % 18.34 % 15.66 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 3,458,761,839 | |
| Holdings Count | Holding | 76 | [2] |
| Advisory Fees Paid, Amount | $ 27,376,168 | |
| Investment Company Portfolio Turnover | 49.26% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 76 Portfolio turnover rate as of the end of the reporting period 49.26 % Total advisory fees paid $ Long portfolio exposure 108.1 % Short portfolio exposure (8.1 ) % Net portfolio exposure 100.0 % Cash 0.0 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 15.1 % Consumer Discretionary 14.6 % Consumer Staples (0.1 ) % Energy 0.5 % Exchange Traded Funds (1.5 ) % Financials 4.4 % Healthcare 7.6 % Industrials 10.1 % Information Technology 47.0 % Market Indices (1.2 ) % Materials 0.3 % Real Estate 1.5 % Utilities 1.7 % Short-Term Investments and Other Net Assets 0.0 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000068368 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Spectra Fund | |
| Class Name | Class I | |
| Trading Symbol | ASPIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Spectra Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Spectra Fund $ 1.50 % | |
| Expenses Paid, Amount | $ 192 | |
| Expense Ratio, Percent | 1.50% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Spectra Fund Class I returned 55.59% for the fiscal twelve-month period ended October 31, 2024, compared to the 43.42% return of the Russell 3000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Communication Services. The largest sector overweight was Industrials and the largest sector underweight was Consumer Staples. Contributors to Performance The Information Technology and Health Care sectors provided the largest contributions to relative performance. NVIDIA Corp.; Meta Platforms Inc; Microsoft Corp.; Amazon.com, Inc.; and Natera, Inc. were the top five contributors to absolute performance. Detractors from Performance The Financials and Consumer Staples sectors were the largest detractors from relative performance. SPDR S&P 500 ETF Trust; Informatica, Inc.; Mobileye Global, Inc.; HubSpot, Inc.; and Edwards Lifesciences Corp. were among the top detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class I shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Spectra Fund Class I 55.59 % 14.58 % 13.29 % Russell 3000 Growth Index 43.42 % 18.34 % 15.66 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 3,458,761,839 | |
| Holdings Count | Holding | 76 | [3] |
| Advisory Fees Paid, Amount | $ 27,376,168 | |
| Investment Company Portfolio Turnover | 49.26% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 76 Portfolio turnover rate as of the end of the reporting period 49.26 % Total advisory fees paid $ Long portfolio exposure 108.1 % Short portfolio exposure (8.1 ) % Net portfolio exposure 100.0 % Cash 0.0 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 15.1 % Consumer Discretionary 14.6 % Consumer Staples (0.1 ) % Energy 0.5 % Exchange Traded Funds (1.5 ) % Financials 4.4 % Healthcare 7.6 % Industrials 10.1 % Information Technology 47.0 % Market Indices (1.2 ) % Materials 0.3 % Real Estate 1.5 % Utilities 1.7 % Short-Term Investments and Other Net Assets 0.0 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000095102 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Spectra Fund | |
| Class Name | Class Y | |
| Trading Symbol | ASPYX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Spectra Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Spectra Fund $ 1.13 % | |
| Expenses Paid, Amount | $ 145 | |
| Expense Ratio, Percent | 1.13% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Spectra Fund Class Y returned 56.15% for the fiscal twelve-month period ended October 31, 2024, compared to the 43.42% return of the Russell 3000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Communication Services. The largest sector overweight was Industrials and the largest sector underweight was Consumer Staples. Contributors to Performance The Information Technology and Health Care sectors provided the largest contributions to relative performance. NVIDIA Corp.; Meta Platforms Inc; Microsoft Corp.; Amazon.com, Inc.; and Natera, Inc. were the top five contributors to absolute performance. Detractors from Performance The Financials and Consumer Staples sectors were the largest detractors from relative performance. SPDR S&P 500 ETF Trust; Informatica, Inc.; Mobileye Global, Inc.; HubSpot, Inc.; and Edwards Lifesciences Corp. were among the top detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed annual periods for the life of Class Y shares of the Fund since its inception. The graph assumes a $500,000 initial investment at net asset value at the inception date of the Fund in an appropriate, broad-based securities market index and a more INITIAL INVESTMENT OF $500,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years Since Inception Alger Spectra Fund Class Y 56.15 % 15.00 % 14.63 % Russell 3000 Growth Index 43.42 % 18.34 % 17.79 % S&P 500 Index 38.02 % 15.27 % 14.76 % | |
| Performance Inception Date | Dec. 03, 2018 | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 3,458,761,839 | |
| Holdings Count | Holding | 76 | [4] |
| Advisory Fees Paid, Amount | $ 27,376,168 | |
| Investment Company Portfolio Turnover | 49.26% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 76 Portfolio turnover rate as of the end of the reporting period 49.26 % Total advisory fees paid $ Long portfolio exposure 108.1 % Short portfolio exposure (8.1 ) % Net portfolio exposure 100.0 % Cash 0.0 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 15.1 % Consumer Discretionary 14.6 % Consumer Staples (0.1 ) % Energy 0.5 % Exchange Traded Funds (1.5 ) % Financials 4.4 % Healthcare 7.6 % Industrials 10.1 % Information Technology 47.0 % Market Indices (1.2 ) % Materials 0.3 % Real Estate 1.5 % Utilities 1.7 % Short-Term Investments and Other Net Assets 0.0 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000206605 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Spectra Fund | |
| Class Name | Class Z | |
| Trading Symbol | ASPZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Spectra Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Spectra Fund $ 1.19 % | |
| Expenses Paid, Amount | $ 152 | |
| Expense Ratio, Percent | 1.19% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Spectra Fund Class Z returned 56.06% for the fiscal twelve-month period ended October 31, 2024, compared to the 43.42% return of the Russell 3000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Communication Services. The largest sector overweight was Industrials and the largest sector underweight was Consumer Staples. Contributors to Performance The Information Technology and Health Care sectors provided the largest contributions to relative performance. NVIDIA Corp.; Meta Platforms Inc; Microsoft Corp.; Amazon.com, Inc.; and Natera, Inc. were the top five contributors to absolute performance. Detractors from Performance The Financials and Consumer Staples sectors were the largest detractors from relative performance. SPDR S&P 500 ETF Trust; Informatica, Inc.; Mobileye Global, Inc.; HubSpot, Inc.; and Edwards Lifesciences Corp. were among the top detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class Z shares of the Fund. The graph assumes a $500,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $500,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Spectra Fund Class Z 56.06 % 14.95 % 13.64 % Russell 3000 Growth Index 43.42 % 18.34 % 15.66 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Mar. 01, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 3,458,761,839 | |
| Holdings Count | Holding | 76 | [5] |
| Advisory Fees Paid, Amount | $ 27,376,168 | |
| Investment Company Portfolio Turnover | 49.26% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 76 Portfolio turnover rate as of the end of the reporting period 49.26 % Total advisory fees paid $ Long portfolio exposure 108.1 % Short portfolio exposure (8.1 ) % Net portfolio exposure 100.0 % Cash 0.0 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 15.1 % Consumer Discretionary 14.6 % Consumer Staples (0.1 ) % Energy 0.5 % Exchange Traded Funds (1.5 ) % Financials 4.4 % Healthcare 7.6 % Industrials 10.1 % Information Technology 47.0 % Market Indices (1.2 ) % Materials 0.3 % Real Estate 1.5 % Utilities 1.7 % Short-Term Investments and Other Net Assets 0.0 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. Effective March 1, 2024, Alger Management has contractually agreed to waive and/or reimburse Fund expenses (excluding custody fees, acquired fund fees and expenses, interest, taxes, brokerage and extraordinary expenses, to the extent applicable) through October 31, 2025 to the extent necessary to limit other expenses and any other applicable share class-specific expenses of the Class Z Shares of the Fund to 0.34% of the class’s average daily net assets. On October 22, 2024, the Board approved that any fees incurred as a result of the joint special meeting of shareholders would be excluded from the expense reimbursement. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Expenses [Text Block] | Effective March 1, 2024, Alger Management has contractually agreed to waive and/or reimburse Fund expenses (excluding custody fees, acquired fund fees and expenses, interest, taxes, brokerage and extraordinary expenses, to the extent applicable) through October 31, 2025 to the extent necessary to limit other expenses and any other applicable share class-specific expenses of the Class Z Shares of the Fund to 0.34% of the class’s average daily net assets. On October 22, 2024, the Board approved that any fees incurred as a result of the joint special meeting of shareholders would be excluded from the expense reimbursement. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000039961 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Responsible Investing Fund | |
| Class Name | Class A | |
| Trading Symbol | SPEGX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Responsible Investing Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Responsible Investing Fund $ 1.15 % | |
| Expenses Paid, Amount | $ 137 | |
| Expense Ratio, Percent | 1.15% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Responsible Investing Fund Class A returned 37.96%, excluding sales load, for the fiscal twelve-month period ended October 31, 2024, compared to the 43.77% return of the Russell 1000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Consumer Discretionary. The largest sector overweight was Industrials and the largest sector underweight was Communication Services. Contributors to Performance The Industrials and Utilities sectors provided the largest contributions to relative performance. NVIDIA Corp.; Microsoft Corp.; Amazon.com, Inc.; Apple Inc.; and Vertiv Holdings Co. were the top five contributors to absolute performance. Detractors from Performance The Communication Services and Health Care sectors were the largest detractors from relative performance. Humana Inc.; Aptiv; NIKE, Inc.; Paycom Software, Inc.; and Mobileye Global, Inc. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class A shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Responsible Investing Fund Class A 30.70 % 14.39 % 12.55 % Alger Responsible Investing Fund Class A—excluding sales load 37.96 % 15.63 % 13.16 % Russell 1000 Growth Index 43.77 % 19.00 % 16.18 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Feb. 29, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 95,075,065 | |
| Holdings Count | Holding | 64 | [6] |
| Advisory Fees Paid, Amount | $ 658,312 | |
| Investment Company Portfolio Turnover | 9.02% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 64 Portfolio turnover rate as of the end of the reporting period 9.02 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 9.1 % Consumer Discretionary 12.5 % Consumer Staples 1.9 % Financials 7.1 % Healthcare 8.6 % Industrials 6.8 % Information Technology 49.1 % Materials 1.2 % Real Estate 1.7 % Utilities 1.4 % Short-Term Investments and Other Net Assets 0.6 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. Effective February 29, 2024, Fred Alger Management, LLC has contractually agreed to waive and/or reimburse Fund expenses (excluding custody fees, acquired fund fees and expenses, dividend expense on short sales, net borrowing costs, interest, taxes, brokerage and extraordinary expenses, to the extent applicable) through October 31, 2025 to the extent necessary to limit other expenses and any other applicable share class-specific expenses of the Class A Shares of the Fund to 0.38% of the class’s average daily net assets. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Expenses [Text Block] | Effective February 29, 2024, Fred Alger Management, LLC has contractually agreed to waive and/or reimburse Fund expenses (excluding custody fees, acquired fund fees and expenses, dividend expense on short sales, net borrowing costs, interest, taxes, brokerage and extraordinary expenses, to the extent applicable) through October 31, 2025 to the extent necessary to limit other expenses and any other applicable share class-specific expenses of the Class A Shares of the Fund to 0.38% of the class’s average daily net assets. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000068369 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Responsible Investing Fund | |
| Class Name | Class C | |
| Trading Symbol | AGFCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Responsible Investing Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Responsible Investing Fund $ 2.03 % | |
| Expenses Paid, Amount | $ 240 | |
| Expense Ratio, Percent | 2.03% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Responsible Investing Fund Class C returned 36.79%, excluding contingent deferred sales charge, for the fiscal twelve-month period ended October 31, 2024, compared to the 43.77% return of the Russell 1000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Consumer Discretionary. The largest sector overweight was Industrials and the largest sector underweight was Communication Services. Contributors to Performance The Industrials and Utilities sectors provided the largest contributions to relative performance. NVIDIA Corp.; Microsoft Corp.; Amazon.com, Inc.; Apple Inc.; and Vertiv Holdings Co. were the top five contributors to absolute performance. Detractors from Performance The Communication Services and Health Care sectors were the largest detractors from relative performance. Humana Inc.; Aptiv; NIKE, Inc.; Paycom Software, Inc.; and Mobileye Global, Inc. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class C shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Responsible Investing Fund Class C 35.79 % 14.72 % 12.46 % Alger Responsible Investing Fund Class C—excluding contingent deferred sales charges 36.79 % 14.72 % 12.46 % Russell 1000 Growth Index 43.77 % 19.00 % 16.18 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 95,075,065 | |
| Holdings Count | Holding | 64 | [7] |
| Advisory Fees Paid, Amount | $ 658,312 | |
| Investment Company Portfolio Turnover | 9.02% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 64 Portfolio turnover rate as of the end of the reporting period 9.02 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 9.1 % Consumer Discretionary 12.5 % Consumer Staples 1.9 % Financials 7.1 % Healthcare 8.6 % Industrials 6.8 % Information Technology 49.1 % Materials 1.2 % Real Estate 1.7 % Utilities 1.4 % Short-Term Investments and Other Net Assets 0.6 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000068370 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Responsible Investing Fund | |
| Class Name | Class I | |
| Trading Symbol | AGIFX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Responsible Investing Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Responsible Investing Fund $ 1.15 % | |
| Expenses Paid, Amount | $ 137 | |
| Expense Ratio, Percent | 1.15% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Responsible Investing Fund Class I returned 38.00% for the fiscal twelve-month period ended October 31, 2024, compared to the 43.77% return of the Russell 1000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Consumer Discretionary. The largest sector overweight was Industrials and the largest sector underweight was Communication Services. Contributors to Performance The Industrials and Utilities sectors provided the largest contributions to relative performance. NVIDIA Corp.; Microsoft Corp.; Amazon.com, Inc.; Apple Inc.; and Vertiv Holdings Co. were the top five contributors to absolute performance. Detractors from Performance The Communication Services and Health Care sectors were the largest detractors from relative performance. Humana Inc.; Aptiv; NIKE, Inc.; Paycom Software, Inc.; and Mobileye Global, Inc. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class I shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Responsible Investing Fund Class I 38.00 % 15.62 % 13.17 % Russell 1000 Growth Index 43.77 % 19.00 % 16.18 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Feb. 29, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 95,075,065 | |
| Holdings Count | Holding | 64 | [8] |
| Advisory Fees Paid, Amount | $ 658,312 | |
| Investment Company Portfolio Turnover | 9.02% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 64 Portfolio turnover rate as of the end of the reporting period 9.02 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 9.1 % Consumer Discretionary 12.5 % Consumer Staples 1.9 % Financials 7.1 % Healthcare 8.6 % Industrials 6.8 % Information Technology 49.1 % Materials 1.2 % Real Estate 1.7 % Utilities 1.4 % Short-Term Investments and Other Net Assets 0.6 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. Effective February 29, 2024, Fred Alger Management, LLC has contractually agreed to waive and/or reimburse Fund expenses (excluding custody fees, acquired fund fees and expenses, dividend expense on short sales, net borrowing costs, interest, taxes, brokerage and extraordinary expenses, to the extent applicable) through October 31, 2025 to the extent necessary to limit other expenses and any other applicable share class-specific expenses of the Class I Shares of the Fund to 0.38% of the class’s average daily net assets. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Expenses [Text Block] | Effective February 29, 2024, Fred Alger Management, LLC has contractually agreed to waive and/or reimburse Fund expenses (excluding custody fees, acquired fund fees and expenses, dividend expense on short sales, net borrowing costs, interest, taxes, brokerage and extraordinary expenses, to the extent applicable) through October 31, 2025 to the extent necessary to limit other expenses and any other applicable share class-specific expenses of the Class I Shares of the Fund to 0.38% of the class’s average daily net assets. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000174226 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Responsible Investing Fund | |
| Class Name | Class Z | |
| Trading Symbol | ALGZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Responsible Investing Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Responsible Investing Fund $ 0.96 % | |
| Expenses Paid, Amount | $ 114 | |
| Expense Ratio, Percent | 0.96% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Responsible Investing Fund Class Z returned 38.24% for the fiscal twelve-month period ended October 31, 2024, compared to the 43.77% return of the Russell 1000 Growth Index. During the reporting period, the largest sector weightings were Information Technology and Consumer Discretionary. The largest sector overweight was Industrials and the largest sector underweight was Communication Services. Contributors to Performance The Industrials and Utilities sectors provided the largest contributions to relative performance. NVIDIA Corp.; Microsoft Corp.; Amazon.com, Inc.; Apple Inc.; and Vertiv Holdings Co. were the top five contributors to absolute performance. Detractors from Performance The Communication Services and Health Care sectors were the largest detractors from relative performance. Humana Inc.; Aptiv; NIKE, Inc.; Paycom Software, Inc.; and Mobileye Global, Inc. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed annual periods for the life of Class Z shares of the Fund since its inception. The graph assumes a $500,000 initial investment at net asset value at the inception date of the Fund in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $500,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years Since Inception Alger Responsible Investing Fund Class Z 38.24 % 16.03 % 16.36 % Russell 1000 Growth Index 43.77 % 19.00 % 18.76 % S&P 500 Index 38.02 % 15.27 % 15.00 % | |
| Performance Inception Date | Oct. 14, 2016 | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 95,075,065 | |
| Holdings Count | Holding | 64 | [9] |
| Advisory Fees Paid, Amount | $ 658,312 | |
| Investment Company Portfolio Turnover | 9.02% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 64 Portfolio turnover rate as of the end of the reporting period 9.02 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 9.1 % Consumer Discretionary 12.5 % Consumer Staples 1.9 % Financials 7.1 % Healthcare 8.6 % Industrials 6.8 % Information Technology 49.1 % Materials 1.2 % Real Estate 1.7 % Utilities 1.4 % Short-Term Investments and Other Net Assets 0.6 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000078761 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Dynamic Opportunities Fund | |
| Class Name | Class A | |
| Trading Symbol | SPEDX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Dynamic Opportunities Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Dynamic Opportunities Fund $ 2.07 % | |
| Expenses Paid, Amount | $ 236 | |
| Expense Ratio, Percent | 2.07% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Dynamic Opportunities Fund Class A returned 28.09%, excluding sales load, for the fiscal twelve-month period ended October 31, 2024, compared to the 38.02% return of the S&P 500 Index and the 19.57% return of the HFRI Equity Hedge (Total) Index. During the reporting period, the average allocation to long positions was 85.65% and the average allocation to short positions was -29.60%. The Fund’s average cash allocation, which includes short sale proceeds, was 43.96%. Based on the net exposure of long and short positions, the Information Technology and Health Care sectors were the largest sector weightings for the reporting period. Industrials was the largest sector overweight and the Information Technology sector was the largest underweight. Long positions, in aggregate, contributed to absolute and relative performance while short positions, in aggregate, detracted from both absolute and relative performance. During the period, exposure of long derivative positions in the S&P 500 Index detracted from both absolute and relative performance, while exposure of short derivative positions in the S&P 500 Index contributed to absolute performance and relative performance. Contributors to Performance Based on the net exposure of long and short positions, the Health Care and Industrials sectors provided the largest contributions to relative performance. NVIDIA Corp.; Natera, Inc.; TransDigm Group Inc.; Glaukos Corp; and Spotify Technology were among the top contributors to absolute performance. Detractors from Performance Based on the net exposure of short and long positions, the Financials and Information Technology sectors were the largest detractors from relative performance. Snap, Inc.; Nevro Corp.; ACADIA Pharmaceuticals Inc.; Progyny, Inc.; and Flywire Corp. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class A shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Dynamic Opportunities Fund Class A 21.35 % 9.02 % 7.08 % Alger Dynamic Opportunities Fund Class A—excluding sales load 28.09 % 10.21 % 7.66 % HFRI Equity Hedge (Total) Index 19.57 % 8.52 % 6.08 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 200,757,210 | |
| Holdings Count | Holding | 120 | [10] |
| Advisory Fees Paid, Amount | $ 2,768,283 | |
| Investment Company Portfolio Turnover | 373.89% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 120 Portfolio turnover rate as of the end of the reporting period 373.89 % Total advisory fees paid $ Long portfolio exposure 83.4 % Short portfolio exposure (24.5 ) % Net portfolio exposure 58.9 % Cash, Short-Term Investments and Other Net Assets 41.1 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 7.0 % Consumer Discretionary 5.6 % Consumer Staples (2.0 ) % Energy 0.8 % Exchange Traded Funds (1.2 ) % Financials 5.6 % Healthcare 12.3 % Industrials 14.0 % Information Technology 14.7 % Market Indices (0.3 ) % Materials (1.0 ) % Real Estate 2.1 % Utilities 1.3 % Short-Term Investments and Other Net Assets 41.1 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective January 16, 2024, George Ortega was added as portfolio manager of the Fund. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000098121 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Dynamic Opportunities Fund | |
| Class Name | Class C | |
| Trading Symbol | ADOCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Dynamic Opportunities Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Dynamic Opportunities Fund $ 2.83 % | |
| Expenses Paid, Amount | $ 321 | |
| Expense Ratio, Percent | 2.83% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Dynamic Opportunities Fund Class C returned 27.09%, excluding contingent deferred sales charge, for the fiscal twelve-month period ended October 31, 2024, compared to the 38.02% return of the S&P 500 Index and the 19.57% return of the HFRI Equity Hedge (Total) Index. During the reporting period, the average allocation to long positions was 85.65% and the average allocation to short positions was -29.60%. The Fund’s average cash allocation, which includes short sale proceeds, was 43.96%. Based on the net exposure of long and short positions, the Information Technology and Health Care sectors were the largest sector weightings for the reporting period. Industrials was the largest sector overweight and the Information Technology sector was the largest underweight. Long positions, in aggregate, contributed to absolute and relative performance while short positions, in aggregate, detracted from both absolute and relative performance. During the period, exposure of long derivative positions in the S&P 500 Index detracted from both absolute and relative performance, while exposure of short derivative positions in the S&P 500 Index contributed to absolute performance and relative performance. Contributors to Performance Based on the net exposure of long and short positions, the Health Care and Industrials sectors provided the largest contributions to relative performance. NVIDIA Corp.; Natera, Inc.; TransDigm Group Inc.; Glaukos Corp; and Spotify Technology were among the top contributors to absolute performance. Detractors from Performance Based on the net exposure of short and long positions, the Financials and Information Technology sectors were the largest detractors from relative performance. Snap, Inc.; Nevro Corp.; ACADIA Pharmaceuticals Inc.; Progyny, Inc.; and Flywire Corp. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class C shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Dynamic Opportunities Fund Class C 26.09 % 9.37 % 7.00 % Alger Dynamic Opportunities Fund Class C—excluding contingent deferred sales charge 27.09 % 9.37 % 7.00 % HFRI Equity Hedge (Total) Index 19.57 % 8.52 % 6.08 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 200,757,210 | |
| Holdings Count | Holding | 120 | [11] |
| Advisory Fees Paid, Amount | $ 2,768,283 | |
| Investment Company Portfolio Turnover | 373.89% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 120 Portfolio turnover rate as of the end of the reporting period 373.89 % Total advisory fees paid $ Long portfolio exposure 83.4 % Short portfolio exposure (24.5 ) % Net portfolio exposure 58.9 % Cash, Short-Term Investments and Other Net Assets 41.1 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 7.0 % Consumer Discretionary 5.6 % Consumer Staples (2.0 ) % Energy 0.8 % Exchange Traded Funds (1.2 ) % Financials 5.6 % Healthcare 12.3 % Industrials 14.0 % Information Technology 14.7 % Market Indices (0.3 ) % Materials (1.0 ) % Real Estate 2.1 % Utilities 1.3 % Short-Term Investments and Other Net Assets 41.1 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective January 16, 2024, George Ortega was added as portfolio manager of the Fund. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000095104 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Dynamic Opportunities Fund | |
| Class Name | Class Z | |
| Trading Symbol | ADOZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Dynamic Opportunities Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Dynamic Opportunities Fund $ 1.75 % | |
| Expenses Paid, Amount | $ 200 | |
| Expense Ratio, Percent | 1.75% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Dynamic Opportunities Fund Class Z returned 28.54% for the fiscal twelve-month period ended October 31, 2024, compared to the 38.02% return of the S&P 500 Index and the 19.57% return of the HFRI Equity Hedge (Total) Index. During the reporting period, the average allocation to long positions was 85.65% and the average allocation to short positions was -29.60%. The Fund’s average cash allocation, which includes short sale proceeds, was 43.96%. Based on the net exposure of long and short positions, the Information Technology and Health Care sectors were the largest sector weightings for the reporting period. Industrials was the largest sector overweight and the Information Technology sector was the largest underweight. Long positions, in aggregate, contributed to absolute and relative performance while short positions, in aggregate, detracted from both absolute and relative performance. During the period, exposure of long derivative positions in the S&P 500 Index detracted from both absolute and relative performance, while exposure of short derivative positions in the S&P 500 Index contributed to absolute performance and relative performance. Contributors to Performance Based on the net exposure of long and short positions, the Health Care and Industrials sectors provided the largest contributions to relative performance. NVIDIA Corp.; Natera, Inc.; TransDigm Group Inc.; Glaukos Corp; and Spotify Technology were among the top contributors to absolute performance. Detractors from Performance Based on the net exposure of short and long positions, the Financials and Information Technology sectors were the largest detractors from relative performance. Snap, Inc.; Nevro Corp.; ACADIA Pharmaceuticals Inc.; Progyny, Inc.; and Flywire Corp. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY Resilient Corporate Earnings Positive Strong corporate earnings were driven by profit margin improvement and robust consumer spending. Themes such as AI proliferation, waning cloud optimization pressure, and profit margin expansion from increased productivity and expense control also supported market sentiment. Federal Reserve Rate Cuts Positive In September 2024, the Federal Reserve initiated a rate-cutting cycle with a 50-basis point reduction, aiming to bolster economic growth amid a strong but softening labor market and easing inflation, creating a favorable backdrop for equities. Rising Geopolitical Tensions Negative Geopolitical conflicts and trade disputes created some uncertainty ahead of the 2024 U.S. presidential election. Weakening U.S. Labor Market Negative In August 2024, equity markets experienced a brief sell-off due to growth concerns following a weaker-than-expected July payrolls report, which raised fears that the Federal Reserve might be slow to respond to slowing economic conditions. The unemployment rate increased to 4.3%, triggering the Sahm rule—a recession indicator that signals a likely recession when the three-month moving average of the unemployment rate rises by at least 50 basis points from its twelve-month low. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class Z shares of the Fund. The graph assumes a $500,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index and a more narrowly based index that reflects the market sector in which the Fund invests for the same period. INITIAL INVESTMENT OF $500,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Dynamic Opportunities Fund Class Z 28.54 % 10.51 % 7.97 % HFRI Equity Hedge (Total) Index 19.57 % 8.52 % 6.08 % S&P 500 Index 38.02 % 15.27 % 13.00 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 200,757,210 | |
| Holdings Count | Holding | 120 | [12] |
| Advisory Fees Paid, Amount | $ 2,768,283 | |
| Investment Company Portfolio Turnover | 373.89% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 120 Portfolio turnover rate as of the end of the reporting period 373.89 % Total advisory fees paid $ Long portfolio exposure 83.4 % Short portfolio exposure (24.5 ) % Net portfolio exposure 58.9 % Cash, Short-Term Investments and Other Net Assets 41.1 % 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Communication Services 7.0 % Consumer Discretionary 5.6 % Consumer Staples (2.0 ) % Energy 0.8 % Exchange Traded Funds (1.2 ) % Financials 5.6 % Healthcare 12.3 % Industrials 14.0 % Information Technology 14.7 % Market Indices (0.3 ) % Materials (1.0 ) % Real Estate 2.1 % Utilities 1.3 % Short-Term Investments and Other Net Assets 41.1 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective January 16, 2024, George Ortega was added as portfolio manager of the Fund. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000095099 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Emerging Markets Fund | |
| Class Name | Class A | |
| Trading Symbol | AAEMX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Emerging Markets Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Emerging Markets Fund $ 1.58 % | |
| Expenses Paid, Amount | $ 177 | |
| Expense Ratio, Percent | 1.58% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Emerging Markets Fund Class A returned 23.60%, excluding sales load, for the fiscal twelve-month period ended October 31, 2024, compared to the 25.95% return of the MSCI Emerging Markets Index. During the reporting period, the largest sector weightings were Consumer Discretionary and Information Technology. The largest sector overweight was Consumer Discretionary and the largest sector underweight was Financials. Contributors to Performance The Consumer Discretionary and Real Estate sectors provided the largest contributions to relative performance. Taiwan Semiconductor Manufacturing Co., Ltd.; MakeMyTrip Ltd.; Trip.com Group Ltd.; Nu Holdings Ltd.; and MercadoLibre, Inc. were among the top contributors to absolute performance. Detractors from Performance The Communication Services and Financials sectors were the largest detractors from relative performance. Samsung Electronics Co., Ltd.; Arcos Dorados Holdings, Inc.; MINISO Group Holding Ltd.; Arca Continental SAB de CV; and Polycab India Ltd. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY China Stimulus Measures Positive In September, the Chinese government responded to ongoing economic challenges by announcing coordinated policy easing measures, including interest rate cuts, reduced reserve requirements, increased fiscal spending, and support for the property market, all aimed at stimulating growth and stabilizing the economy. Global Economic Growth Positive Economic growth remained strong throughout the reporting period, with emerging markets countries like India benefiting from strengthened manufacturing and Taiwan benefiting from increased demand for AI-related hardware. Rising Geopolitical Tensions Negative Escalating geopolitical conflicts, particularly in the Middle East, led to some equity market volatility. Inflationary Pressures Negative Persistent inflation in certain regions of the world, such as Brazil, reduced expectations for rate cuts, which dampened investor sentiment to a degree. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class A shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Emerging Markets Fund Class A 17.06 % 2.69 % 2.31 % Alger Emerging Markets Fund Class A—excluding sales load 23.60 % 3.80 % 2.86 % MSCI Emerging Markets Index 25.95 % 4.35 % 3.83 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Feb. 01, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 18,852,889 | |
| Holdings Count | Holding | 39 | [13] |
| Advisory Fees Paid, Amount | $ 153,038 | |
| Investment Company Portfolio Turnover | 111.97% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 39 Portfolio turnover rate as of the end of the reporting period 111.97 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Geographical Allocation † Argentina 1.6 % Brazil 8.1 % China 26.0 % Greece 3.3 % Hungary 2.5 % India 16.0 % Indonesia 2.3 % Mexico 2.2 % Philippines 2.5 % Saudi Arabia 1.5 % South Africa 4.2 % South Korea 6.4 % Taiwan 15.4 % Turkey 3.2 % United Arab Emirates 2.5 % United States 1.4 % Short-Term Investments and Net Other Assets 0.9 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. No changes were made to the investment objective, principal investment strategies, principal risks or investments restrictions as a result of this change. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Adviser [Text Block] | Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000095100 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Emerging Markets Fund | |
| Class Name | Class C | |
| Trading Symbol | ACEMX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Emerging Markets Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Emerging Markets Fund $ 2.33 % | |
| Expenses Paid, Amount | $ 259 | |
| Expense Ratio, Percent | 2.33% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Emerging Markets Fund Class C returned 22.60%, excluding contingent deferred sales charge, for the fiscal twelve-month period ended October 31, 2024, compared to the 25.95% return of the MSCI Emerging Markets Index. During the reporting period, the largest sector weightings were Consumer Discretionary and Information Technology. The largest sector overweight was Consumer Discretionary and the largest sector underweight was Financials. Contributors to Performance The Consumer Discretionary and Real Estate sectors provided the largest contributions to relative performance. Taiwan Semiconductor Manufacturing Co., Ltd.; MakeMyTrip Ltd.; Trip.com Group Ltd.; Nu Holdings Ltd.; and MercadoLibre, Inc. were among the top contributors to absolute performance. Detractors from Performance The Communication Services and Financials sectors were the largest detractors from relative performance. Samsung Electronics Co., Ltd.; Arcos Dorados Holdings, Inc.; MINISO Group Holding Ltd.; Arca Continental SAB de CV; and Polycab India Ltd. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY China Stimulus Measures Positive In September, the Chinese government responded to ongoing economic challenges by announcing coordinated policy easing measures, including interest rate cuts, reduced reserve requirements, increased fiscal spending, and support for the property market, all aimed at stimulating growth and stabilizing the economy. Global Economic Growth Positive Economic growth remained strong throughout the reporting period, with emerging markets countries like India benefiting from strengthened manufacturing and Taiwan benefiting from increased demand for AI-related hardware. Rising Geopolitical Tensions Negative Escalating geopolitical conflicts, particularly in the Middle East, led to some equity market volatility. Inflationary Pressures Negative Persistent inflation in certain regions of the world, such as Brazil, reduced expectations for rate cuts, which dampened investor sentiment to a degree. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class C shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Emerging Markets Fund Class C 21.60 % 3.00 % 2.24 % Alger Emerging Markets Fund Class C—excluding contingent deferred sales charges 22.60 % 3.00 % 2.24 % MSCI Emerging Markets Index 25.95 % 4.35 % 3.83 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Feb. 01, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 18,852,889 | |
| Holdings Count | Holding | 39 | [14] |
| Advisory Fees Paid, Amount | $ 153,038 | |
| Investment Company Portfolio Turnover | 111.97% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 39 Portfolio turnover rate as of the end of the reporting period 111.97 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Geographical Allocation † Argentina 1.6 % Brazil 8.1 % China 26.0 % Greece 3.3 % Hungary 2.5 % India 16.0 % Indonesia 2.3 % Mexico 2.2 % Philippines 2.5 % Saudi Arabia 1.5 % South Africa 4.2 % South Korea 6.4 % Taiwan 15.4 % Turkey 3.2 % United Arab Emirates 2.5 % United States 1.4 % Short-Term Investments and Net Other Assets 0.9 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. No changes were made to the investment objective, principal investment strategies, principal risks or investments restrictions as a result of this change. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Adviser [Text Block] | Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000095101 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Emerging Markets Fund | |
| Class Name | Class I | |
| Trading Symbol | AIEMX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Emerging Markets Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Emerging Markets Fund $ 1.49 % | |
| Expenses Paid, Amount | $ 167 | |
| Expense Ratio, Percent | 1.49% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Emerging Markets Fund Class I returned 23.68% for the fiscal twelve-month period ended October 31, 2024, compared to the 25.95% return of the MSCI Emerging Markets Index. During the reporting period, the largest sector weightings were Consumer Discretionary and Information Technology. The largest sector overweight was Consumer Discretionary and the largest sector underweight was Financials. Contributors to Performance The Consumer Discretionary and Real Estate sectors provided the largest contributions to relative performance. Taiwan Semiconductor Manufacturing Co., Ltd.; MakeMyTrip Ltd.; Trip.com Group Ltd.; Nu Holdings Ltd.; and MercadoLibre, Inc. were among the top contributors to absolute performance. Detractors from Performance The Communication Services and Financials sectors were the largest detractors from relative performance. Samsung Electronics Co., Ltd.; Arcos Dorados Holdings, Inc.; MINISO Group Holding Ltd.; Arca Continental SAB de CV; and Polycab India Ltd. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY China Stimulus Measures Positive In September, the Chinese government responded to ongoing economic challenges by announcing coordinated policy easing measures, including interest rate cuts, reduced reserve requirements, increased fiscal spending, and support for the property market, all aimed at stimulating growth and stabilizing the economy. Global Economic Growth Positive Economic growth remained strong throughout the reporting period, with emerging markets countries like India benefiting from strengthened manufacturing and Taiwan benefiting from increased demand for AI-related hardware. Rising Geopolitical Tensions Negative Escalating geopolitical conflicts, particularly in the Middle East, led to some equity market volatility. Inflationary Pressures Negative Persistent inflation in certain regions of the world, such as Brazil, reduced expectations for rate cuts, which dampened investor sentiment to a degree. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class I shares of the Fund. The graph assumes a $10,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index for the same period. INITIAL INVESTMENT OF $10,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Emerging Markets Fund Class I 23.68 % 3.89 % 2.92 % MSCI Emerging Markets Index 25.95 % 4.35 % 3.83 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Feb. 01, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 18,852,889 | |
| Holdings Count | Holding | 39 | [15] |
| Advisory Fees Paid, Amount | $ 153,038 | |
| Investment Company Portfolio Turnover | 111.97% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 39 Portfolio turnover rate as of the end of the reporting period 111.97 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Geographical Allocation † Argentina 1.6 % Brazil 8.1 % China 26.0 % Greece 3.3 % Hungary 2.5 % India 16.0 % Indonesia 2.3 % Mexico 2.2 % Philippines 2.5 % Saudi Arabia 1.5 % South Africa 4.2 % South Korea 6.4 % Taiwan 15.4 % Turkey 3.2 % United Arab Emirates 2.5 % United States 1.4 % Short-Term Investments and Net Other Assets 0.9 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. No changes were made to the investment objective, principal investment strategies, principal risks or investments restrictions as a result of this change. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Adviser [Text Block] | Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| C000138115 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Alger Emerging Markets Fund | |
| Class Name | Class Z | |
| Trading Symbol | AZEMX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Alger Emerging Markets Fund (“Fund”) for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period | |
| Additional Information Phone Number | (800) 992-3863 | |
| Additional Information Website | https://connect.rightprospectus.com/Alger | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund (Class/Ticker) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Alger Emerging Markets Fund $ 1.01 % | |
| Expenses Paid, Amount | $ 113 | |
| Expense Ratio, Percent | 1.01% | |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance What impacted Fund performance over the reporting period? The Alger Emerging Markets Fund Class Z returned 24.23% for the fiscal twelve-month period ended October 31, 2024, compared to the 25.95% return of the MSCI Emerging Markets Index. During the reporting period, the largest sector weightings were Consumer Discretionary and Information Technology. The largest sector overweight was Consumer Discretionary and the largest sector underweight was Financials. Contributors to Performance The Consumer Discretionary and Real Estate sectors provided the largest contributions to relative performance. Taiwan Semiconductor Manufacturing Co., Ltd.; MakeMyTrip Ltd.; Trip.com Group Ltd.; Nu Holdings Ltd.; and MercadoLibre, Inc. were among the top contributors to absolute performance. Detractors from Performance The Communication Services and Financials sectors were the largest detractors from relative performance. Samsung Electronics Co., Ltd.; Arcos Dorados Holdings, Inc.; MINISO Group Holding Ltd.; Arca Continental SAB de CV; and Polycab India Ltd. were the top five detractors from absolute performance. U.S. FACTOR IMPACT SUMMARY China Stimulus Measures Positive In September, the Chinese government responded to ongoing economic challenges by announcing coordinated policy easing measures, including interest rate cuts, reduced reserve requirements, increased fiscal spending, and support for the property market, all aimed at stimulating growth and stabilizing the economy. Global Economic Growth Positive Economic growth remained strong throughout the reporting period, with emerging markets countries like India benefiting from strengthened manufacturing and Taiwan benefiting from increased demand for AI-related hardware. Rising Geopolitical Tensions Negative Escalating geopolitical conflicts, particularly in the Middle East, led to some equity market volatility. Inflationary Pressures Negative Persistent inflation in certain regions of the world, such as Brazil, reduced expectations for rate cuts, which dampened investor sentiment to a degree. | |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. | |
| Line Graph [Table Text Block] | Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed ten fiscal years of Class Z shares of the Fund. The graph assumes a $500,000 initial investment at the beginning of the first annual period in an appropriate, broad-based securities market index for the same period. INITIAL INVESTMENT OF $500,000 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (As of October 31, 2024) 1 Year 5 Years 10 Years Alger Emerging Markets Fund Class Z 24.23 % 4.35 % 3.36 % MSCI Emerging Markets Index 25.95 % 4.35 % 3.83 % | |
| No Deduction of Taxes [Text Block] | The graph and table do | |
| Material Change Date | Feb. 01, 2024 | |
| Updated Performance Information Location [Text Block] | Visit https://www.alger.com/Pages/StrategyFinder.aspx?vehicle=mf | |
| Net Assets | $ 18,852,889 | |
| Holdings Count | Holding | 39 | [16] |
| Advisory Fees Paid, Amount | $ 153,038 | |
| Investment Company Portfolio Turnover | 111.97% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics as of the fiscal year ended October 31, 2024. Fund net assets $ Total number of portfolio holdings 1 39 Portfolio turnover rate as of the end of the reporting period 111.97 % Total advisory fees paid $ 1 Excludes Money Market Funds. | |
| Holdings [Text Block] | Sector Allocation † Argentina 1.6 % Brazil 8.1 % China 26.0 % Greece 3.3 % Hungary 2.5 % India 16.0 % Indonesia 2.3 % Mexico 2.2 % Philippines 2.5 % Saudi Arabia 1.5 % South Africa 4.2 % South Korea 6.4 % Taiwan 15.4 % Turkey 3.2 % United Arab Emirates 2.5 % United States 1.4 % Short-Term Investments and Net Other Assets 0.9 % 100.0 % † Based on net assets | |
| Material Fund Change [Text Block] | Material and Other Fund Changes Effective January 29, 2024, the Fund's custodian and administrator transitioned from Brown Brothers Harriman & Company to The Bank of New York. Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. No changes were made to the investment objective, principal investment strategies, principal risks or investments restrictions as a result of this change. On August 16, 2024, at a joint special meeting of shareholders, shareholders of the Fund elected three new trustees and one current trustee to the Board. This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Material Fund Change Adviser [Text Block] | Effective February 1, 2024, Redwood Investments, LLC became sub-adviser to the Fund and Michael Mufson, Ezra Samet, and Donald Smith of Redwood replaced the Fund's previous portfolio managers. | |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since November 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by February 28, 2025 at https://connect.rightprospectus.com/Alger | |
| Updated Prospectus Phone Number | (800) 992-3863 | |
| Updated Prospectus Web Address | https://connect.rightprospectus.com/Alger | |
| [1]Excludes Money Market Funds.[2]Excludes Money Market Funds.[3]Excludes Money Market Funds.[4]Excludes Money Market Funds.[5]Excludes Money Market Funds.[6]Excludes Money Market Funds.[7]Excludes Money Market Funds.[8]Excludes Money Market Funds.[9]Excludes Money Market Funds.[10]Excludes Money Market Funds.[11]Excludes Money Market Funds.[12]Excludes Money Market Funds.[13]Excludes Money Market Funds.[14]Excludes Money Market Funds.[15]Excludes Money Market Funds.[16]Excludes Money Market Funds. | ||
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 60 Months Ended | 71 Months Ended | 97 Months Ended | 120 Months Ended | ||||||||||||
| Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019 | Dec. 03, 2018 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 14, 2016 | Oct. 31, 2015 | Oct. 31, 2014 | |
| C000024978 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class A | ||||||||||||||||
| Account Value | $ 32,977.81 | $ 32,977.81 | $ 32,977.81 | $ 32,977.81 | $ 32,977.81 | $ 21,193.17 | $ 18,499.26 | $ 30,765.82 | $ 22,489.01 | $ 16,701.25 | $ 14,546.11 | $ 13,375.51 | $ 10,353.42 | $ 10,390.54 | $ 9,474.99 | ||
| Average Annual Return, Percent | 47.43% | 13.34% | 12.67% | ||||||||||||||
| C000024978 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class A—excluding sales load | ||||||||||||||||
| Average Annual Return, Percent | 55.61% | 14.58% | 13.28% | ||||||||||||||
| C000068367 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class C | ||||||||||||||||
| Account Value | $ 32,767.81 | $ 32,767.81 | 32,767.81 | 32,767.81 | $ 32,767.81 | 21,058.21 | 18,381.45 | 30,791.68 | 22,676.07 | 16,972.91 | 14,891.78 | 13,795.63 | 10,762.39 | 10,884.44 | 10,000 | ||
| Average Annual Return, Percent | 53.49% | 13.71% | 12.60% | ||||||||||||||
| C000068367 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class C—excluding contingent deferred sales charges | ||||||||||||||||
| Average Annual Return, Percent | 54.49% | 13.71% | 12.60% | ||||||||||||||
| C000068368 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class I | ||||||||||||||||
| Account Value | $ 34,824.18 | $ 34,824.18 | 34,824.18 | 34,824.18 | $ 34,824.18 | 22,382.53 | 19,539.84 | 32,482.12 | 23,740.79 | 17,636.87 | 15,356.22 | 14,119.07 | 10,925.79 | 10,964.51 | 10,000 | ||
| Average Annual Return, Percent | 55.59% | 14.58% | 13.29% | ||||||||||||||
| C000095102 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class Y | ||||||||||||||||
| Account Value | $ 1,120,539.33 | $ 1,120,539.33 | $ 1,120,539.33 | 1,120,539.33 | $ 1,120,539.33 | 717,614.75 | 623,900.57 | 1,032,890.63 | 752,756.96 | 557,134.8 | $ 500,000 | ||||||
| Average Annual Return, Percent | 56.15% | 15% | 14.63% | ||||||||||||||
| C000206605 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Spectra Fund Class Z | ||||||||||||||||
| Account Value | $ 1,795,995.09 | $ 1,795,995.09 | $ 1,795,995.09 | 1,795,995.09 | $ 1,795,995.09 | 1,150,825.89 | 1,001,277.3 | 1,659,168.84 | 1,209,154.59 | 895,020.2 | 777,044.32 | 712,317.23 | 549,550.79 | 549,881.95 | 500,000 | ||
| Average Annual Return, Percent | 56.06% | 14.95% | 13.64% | ||||||||||||||
| C000039961 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Responsible Investing Fund Class A | ||||||||||||||||
| Account Value | $ 32,615.38 | $ 32,615.38 | 32,615.38 | 32,615.38 | $ 32,615.38 | 23,640.53 | 20,067.63 | 28,371.85 | 20,294.97 | 15,776.16 | 13,741.53 | 12,718.2 | 9,871.48 | 9,973.79 | 9,471.5 | ||
| Average Annual Return, Percent | 30.70% | 14.39% | 12.55% | ||||||||||||||
| C000039961 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Responsible Investing Fund Class A—excluding sales load | ||||||||||||||||
| Average Annual Return, Percent | 37.96% | 15.63% | 13.16% | ||||||||||||||
| C000068369 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Responsible Investing Fund Class C | ||||||||||||||||
| Account Value | $ 32,344.36 | $ 32,344.36 | 32,344.36 | 32,344.36 | $ 32,344.36 | 23,444.09 | 19,900.87 | 28,377.81 | 20,435.26 | 16,024.26 | 14,059.9 | 13,122.89 | 10,265.56 | 10,451.01 | 10,000 | ||
| Average Annual Return, Percent | 35.79% | 14.72% | 12.46% | ||||||||||||||
| C000068369 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Responsible Investing Fund Class C—excluding contingent deferred sales charges | ||||||||||||||||
| Average Annual Return, Percent | 36.79% | 14.72% | 12.46% | ||||||||||||||
| C000068370 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Responsible Investing Fund Class I | ||||||||||||||||
| Account Value | $ 34,447.9 | $ 34,447.9 | 34,447.9 | 34,447.9 | $ 34,447.9 | 24,961.87 | 21,196.6 | 29,972.45 | 21,436.88 | 16,669.21 | 14,516.51 | 13,447.17 | 10,434.2 | 10,542.45 | 10,000 | ||
| Average Annual Return, Percent | 38% | 15.62% | 13.17% | ||||||||||||||
| C000174226 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Responsible Investing Fund Class Z | ||||||||||||||||
| Account Value | $ 1,691,877.53 | $ 1,691,877.53 | 1,691,877.53 | $ 1,691,877.53 | $ 1,691,877.53 | 1,223,873.37 | 1,034,752.91 | 1,457,814.59 | 1,038,680.89 | 804,473.74 | 697,452.19 | 642,814.6 | 496,739.13 | $ 500,000 | |||
| Average Annual Return, Percent | 38.24% | 16.03% | 16.36% | ||||||||||||||
| C000078761 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Dynamic Opportunities Fund Class A | ||||||||||||||||
| Account Value | $ 19,821.89 | $ 19,821.89 | 19,821.89 | $ 19,821.89 | $ 19,821.89 | 15,475.42 | 16,364.93 | 21,301.3 | 16,665.21 | 12,193.66 | 11,808.58 | 11,355.53 | 9,336.44 | 9,748.12 | 9,476.79 | ||
| Average Annual Return, Percent | 21.35% | 9.02% | 7.08% | ||||||||||||||
| C000078761 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Dynamic Opportunities Fund Class A—excluding sales load | ||||||||||||||||
| Average Annual Return, Percent | 28.09% | 10.21% | 7.66% | ||||||||||||||
| C000098121 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Dynamic Opportunities Fund Class C | ||||||||||||||||
| Account Value | $ 19,680.44 | $ 19,680.44 | 19,680.44 | 19,680.44 | $ 19,680.44 | 15,364.99 | 16,248.15 | 21,303.99 | 16,797.82 | 12,384.56 | 12,077.17 | 11,711.88 | 9,700.9 | 10,211.43 | 10,000 | ||
| Average Annual Return, Percent | 26.09% | 9.37% | 7% | ||||||||||||||
| C000098121 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Dynamic Opportunities Fund Class C—excluding contingent deferred sales charge | ||||||||||||||||
| Average Annual Return, Percent | 27.09% | 9.37% | 7% | ||||||||||||||
| C000095104 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Dynamic Opportunities Fund Class Z | ||||||||||||||||
| Account Value | $ 1,795,995 | $ 1,795,995 | 1,795,995 | 1,795,995 | $ 1,795,995 | 837,296.42 | 882,881.4 | 1,146,138.33 | 894,913.01 | 652,840.42 | 630,504.83 | 604,669.54 | 495,540.39 | 515,774.95 | 500,000 | ||
| Average Annual Return, Percent | 28.54% | 10.51% | 7.97% | ||||||||||||||
| C000095099 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Emerging Markets Fund Class A | ||||||||||||||||
| Account Value | $ 12,567 | $ 12,567 | 12,567 | 12,567 | $ 12,567 | 10,167.33 | 9,564.57 | 15,749.59 | 13,052.21 | 10,429.39 | 9,138.44 | 11,345.9 | 9,135 | 8,584.34 | 9,477.91 | ||
| Average Annual Return, Percent | 17.06% | 2.69% | 2.31% | ||||||||||||||
| C000095099 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Emerging Markets Fund Class A—excluding sales load | ||||||||||||||||
| Average Annual Return, Percent | 23.60% | 3.80% | 2.86% | ||||||||||||||
| C000095100 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Emerging Markets Fund Class C | ||||||||||||||||
| Account Value | $ 12,567 | $ 12,567 | 12,567 | 12,567 | $ 12,567 | 10,167.33 | 9,564.57 | 15,749.59 | 13,052.21 | 10,429.39 | 9,138.44 | 11,345.9 | 9,135 | 8,584.34 | 10,000 | ||
| Average Annual Return, Percent | 21.60% | 3% | 2.24% | ||||||||||||||
| C000095100 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Emerging Markets Fund Class C—excluding contingent deferred sales charges | ||||||||||||||||
| Average Annual Return, Percent | 22.60% | 3% | 2.24% | ||||||||||||||
| C000095101 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Emerging Markets Fund Class I | ||||||||||||||||
| Account Value | $ 13,333.97 | $ 13,333.97 | 13,333.97 | 13,333.97 | $ 13,333.97 | 10,781.43 | 10,125.07 | 16,658.88 | 13,791.17 | 11,016.15 | 9,644.33 | 11,965.84 | 9,640.92 | 9,061.83 | 10,000 | ||
| Average Annual Return, Percent | 23.68% | 3.89% | 2.92% | ||||||||||||||
| C000138115 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Alger Emerging Markets Fund Class Z | ||||||||||||||||
| Account Value | $ 695,741.73 | $ 695,741.73 | 695,741.73 | 695,741.73 | $ 695,741.73 | 560,020.21 | 523,751.06 | 857,678.7 | 707,029.75 | 562,189.47 | 489,602.05 | 604,941.57 | 485,657.32 | 454,835.28 | 500,000 | ||
| Average Annual Return, Percent | 24.23% | 4.35% | 3.36% | ||||||||||||||
| Standard & Poor's 500 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||||||||
| Account Value | $ 33,950.48 | $ 33,950.48 | $ 33,950.48 | $ 33,950.48 | $ 33,950.48 | 24,598.75 | 22,333.51 | 26,155.03 | 18,301.25 | 16,681.39 | 500,000 | 14,591.05 | 13,592.51 | 10,994.31 | 500,000 | 10,519.95 | 10,000 |
| Average Annual Return, Percent | 38.02% | 15.27% | 14.76% | 15% | 13% | ||||||||||||
| HFRI Equity Hedge Total Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | HFRI Equity Hedge (Total) Index | ||||||||||||||||
| Account Value | $ 18,047.82 | $ 18,047.82 | $ 18,047.82 | $ 18,047.82 | $ 18,047.82 | 15,093.99 | 14,467.8 | 16,628.54 | 12,865.16 | 11,992.66 | 11,452.3 | 11,572.64 | 10,236.47 | 10,026.79 | 10,000 | ||
| Average Annual Return, Percent | 19.57% | 8.52% | 6.08% | ||||||||||||||
| MSCI Emerging Markets Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | MSCI Emerging Markets Index | ||||||||||||||||
| Account Value | $ 14,563.79 | $ 14,563.79 | 14,563.79 | 14,563.79 | $ 14,563.79 | 11,563.46 | 10,393.24 | 15,003.49 | 12,786.89 | 11,772.13 | 10,483.46 | 11,938.41 | 9,407.14 | 8,577.99 | 10,000 | ||
| Average Annual Return, Percent | 25.95% | 4.35% | 3.83% | ||||||||||||||
| Russell 3000 Growth Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000 Growth Index | ||||||||||||||||
| Account Value | $ 42,855.08 | $ 42,855.08 | $ 42,855.08 | 42,855.08 | $ 42,855.08 | 29,880.44 | 25,469.27 | 33,811.73 | 23,675.43 | 18,467.48 | $ 500,000 | 15,874.08 | 14,404.99 | 11,097.68 | 10,871.77 | 10,000 | |
| Average Annual Return, Percent | 43.42% | 18.34% | 17.79% | 15.66% | |||||||||||||
| Russell 1000 Growth Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 1000 Growth Index | ||||||||||||||||
| Account Value | $ 44,812 | $ 44,812 | $ 44,812 | $ 44,812 | $ 44,812 | $ 20,826.41 | $ 20,151.35 | $ 28,358.2 | $ 20,339.19 | $ 16,790.25 | $ 14,117.67 | $ 13,301.06 | $ 10,535.85 | $ 500,000 | $ 10,493.56 | $ 10,000 | |
| Average Annual Return, Percent | 43.77% | 19% | 18.76% | 16.18% |
| Shareholder Report, Holdings (Details) | Oct. 31, 2024 | |
| C000024978 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [1] |
| C000024978 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.10% | [1] |
| C000024978 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.60% | [1] |
| C000024978 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.10%) | [1] |
| C000024978 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.50% | [1] |
| C000024978 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.40% | [1] |
| C000024978 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.60% | [1] |
| C000024978 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 10.10% | [1] |
| C000024978 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 47% | [1] |
| C000024978 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.30% | [1] |
| C000024978 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [1] |
| C000024978 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [1] |
| C000024978 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.50%) | [1] |
| C000024978 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0% | [1] |
| C000024978 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [1] |
| C000068367 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [2] |
| C000068367 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.10% | [2] |
| C000068367 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.60% | [2] |
| C000068367 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.10%) | [2] |
| C000068367 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.50% | [2] |
| C000068367 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.40% | [2] |
| C000068367 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.60% | [2] |
| C000068367 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 10.10% | [2] |
| C000068367 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 47% | [2] |
| C000068367 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.30% | [2] |
| C000068367 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [2] |
| C000068367 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [2] |
| C000068367 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.50%) | [2] |
| C000068367 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0% | [2] |
| C000068367 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [2] |
| C000068368 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [3] |
| C000068368 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.10% | [3] |
| C000068368 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.60% | [3] |
| C000068368 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.10%) | [3] |
| C000068368 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.50% | [3] |
| C000068368 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.40% | [3] |
| C000068368 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.60% | [3] |
| C000068368 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 10.10% | [3] |
| C000068368 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 47% | [3] |
| C000068368 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.30% | [3] |
| C000068368 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [3] |
| C000068368 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [3] |
| C000068368 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.50%) | [3] |
| C000068368 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [3] |
| C000068368 [Member] | Short Term Investments and Net Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0% | [3] |
| C000095102 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [4] |
| C000095102 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.10% | [4] |
| C000095102 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.60% | [4] |
| C000095102 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.10%) | [4] |
| C000095102 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.50% | [4] |
| C000095102 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.40% | [4] |
| C000095102 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.60% | [4] |
| C000095102 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 10.10% | [4] |
| C000095102 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 47% | [4] |
| C000095102 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.30% | [4] |
| C000095102 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [4] |
| C000095102 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [4] |
| C000095102 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.50%) | [4] |
| C000095102 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0% | [4] |
| C000095102 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [4] |
| C000206605 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [5] |
| C000206605 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.10% | [5] |
| C000206605 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.60% | [5] |
| C000206605 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.10%) | [5] |
| C000206605 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.50% | [5] |
| C000206605 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.40% | [5] |
| C000206605 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.60% | [5] |
| C000206605 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 10.10% | [5] |
| C000206605 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 47% | [5] |
| C000206605 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.30% | [5] |
| C000206605 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [5] |
| C000206605 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [5] |
| C000206605 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.50%) | [5] |
| C000206605 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0% | [5] |
| C000206605 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [5] |
| C000039961 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [6] |
| C000039961 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9.10% | [6] |
| C000039961 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.50% | [6] |
| C000039961 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [6] |
| C000039961 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.10% | [6] |
| C000039961 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.60% | [6] |
| C000039961 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [6] |
| C000039961 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 49.10% | [6] |
| C000039961 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.20% | [6] |
| C000039961 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [6] |
| C000039961 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [6] |
| C000039961 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.60% | [6] |
| C000068369 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [7] |
| C000068369 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9.10% | [7] |
| C000068369 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.50% | [7] |
| C000068369 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [7] |
| C000068369 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.10% | [7] |
| C000068369 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.60% | [7] |
| C000068369 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [7] |
| C000068369 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 49.10% | [7] |
| C000068369 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.20% | [7] |
| C000068369 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [7] |
| C000068369 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [7] |
| C000068369 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.60% | [7] |
| C000068370 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [8] |
| C000068370 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9.10% | [8] |
| C000068370 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.50% | [8] |
| C000068370 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [8] |
| C000068370 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.10% | [8] |
| C000068370 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.60% | [8] |
| C000068370 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [8] |
| C000068370 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 49.10% | [8] |
| C000068370 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.20% | [8] |
| C000068370 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [8] |
| C000068370 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [8] |
| C000068370 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.60% | [8] |
| C000174226 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [9] |
| C000174226 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9.10% | [9] |
| C000174226 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.50% | [9] |
| C000174226 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [9] |
| C000174226 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.10% | [9] |
| C000174226 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.60% | [9] |
| C000174226 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [9] |
| C000174226 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 49.10% | [9] |
| C000174226 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.20% | [9] |
| C000174226 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [9] |
| C000174226 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.70% | [9] |
| C000174226 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.60% | [9] |
| C000078761 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [10] |
| C000078761 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7% | [10] |
| C000078761 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.60% | [10] |
| C000078761 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (2.00%) | [10] |
| C000078761 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.80% | [10] |
| C000078761 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.60% | [10] |
| C000078761 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.30% | [10] |
| C000078761 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14% | [10] |
| C000078761 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.70% | [10] |
| C000078761 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.00%) | [10] |
| C000078761 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.30% | [10] |
| C000078761 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.10% | [10] |
| C000078761 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [10] |
| C000078761 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 41.10% | [10] |
| C000078761 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.30%) | [10] |
| C000098121 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [11] |
| C000098121 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7% | [11] |
| C000098121 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.60% | [11] |
| C000098121 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (2.00%) | [11] |
| C000098121 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.80% | [11] |
| C000098121 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.60% | [11] |
| C000098121 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.30% | [11] |
| C000098121 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14% | [11] |
| C000098121 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.70% | [11] |
| C000098121 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.00%) | [11] |
| C000098121 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.30% | [11] |
| C000098121 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.10% | [11] |
| C000098121 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [11] |
| C000098121 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 41.10% | [11] |
| C000098121 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.30%) | [11] |
| C000095104 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [12] |
| C000095104 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7% | [12] |
| C000095104 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.60% | [12] |
| C000095104 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (2.00%) | [12] |
| C000095104 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.80% | [12] |
| C000095104 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.60% | [12] |
| C000095104 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.30% | [12] |
| C000095104 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14% | [12] |
| C000095104 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.70% | [12] |
| C000095104 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.00%) | [12] |
| C000095104 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.30% | [12] |
| C000095104 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.10% | [12] |
| C000095104 [Member] | Exchange Traded Funds [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [12] |
| C000095104 [Member] | Short Term Investments and Other Net Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 41.10% | [12] |
| C000095104 [Member] | Market Indices [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (0.30%) | [12] |
| C000095099 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [13] |
| C000095099 [Member] | ARGENTINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.60% | [13] |
| C000095099 [Member] | BRAZIL | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.10% | [13] |
| C000095099 [Member] | CHINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 26% | [13] |
| C000095099 [Member] | GREECE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.30% | [13] |
| C000095099 [Member] | HUNGARY | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [13] |
| C000095099 [Member] | INDIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16% | [13] |
| C000095099 [Member] | INDONESIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [13] |
| C000095099 [Member] | MEXICO | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [13] |
| C000095099 [Member] | PHILIPPINES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [13] |
| C000095099 [Member] | SAUDI ARABIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [13] |
| C000095099 [Member] | SOUTH AFRICA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.20% | [13] |
| C000095099 [Member] | KOREA, REPUBLIC OF | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.40% | [13] |
| C000095099 [Member] | TAIWAN | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.40% | [13] |
| C000095099 [Member] | TÜRKIYE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.20% | [13] |
| C000095099 [Member] | UNITED ARAB EMIRATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [13] |
| C000095099 [Member] | UNITED STATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [13] |
| C000095099 [Member] | Short Term Investments and Net Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.90% | [13] |
| C000095100 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [14] |
| C000095100 [Member] | ARGENTINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.60% | [14] |
| C000095100 [Member] | BRAZIL | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.10% | [14] |
| C000095100 [Member] | CHINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 26% | [14] |
| C000095100 [Member] | GREECE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.30% | [14] |
| C000095100 [Member] | HUNGARY | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [14] |
| C000095100 [Member] | INDIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16% | [14] |
| C000095100 [Member] | INDONESIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [14] |
| C000095100 [Member] | MEXICO | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [14] |
| C000095100 [Member] | PHILIPPINES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [14] |
| C000095100 [Member] | SAUDI ARABIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [14] |
| C000095100 [Member] | SOUTH AFRICA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.20% | [14] |
| C000095100 [Member] | KOREA, REPUBLIC OF | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.40% | [14] |
| C000095100 [Member] | TAIWAN | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.40% | [14] |
| C000095100 [Member] | TÜRKIYE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.20% | [14] |
| C000095100 [Member] | UNITED ARAB EMIRATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [14] |
| C000095100 [Member] | UNITED STATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [14] |
| C000095100 [Member] | Short Term Investments and Net Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.90% | [14] |
| C000095101 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [15] |
| C000095101 [Member] | ARGENTINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.60% | [15] |
| C000095101 [Member] | BRAZIL | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.10% | [15] |
| C000095101 [Member] | CHINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 26% | [15] |
| C000095101 [Member] | GREECE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.30% | [15] |
| C000095101 [Member] | HUNGARY | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [15] |
| C000095101 [Member] | INDIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16% | [15] |
| C000095101 [Member] | INDONESIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [15] |
| C000095101 [Member] | MEXICO | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [15] |
| C000095101 [Member] | PHILIPPINES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [15] |
| C000095101 [Member] | SAUDI ARABIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [15] |
| C000095101 [Member] | SOUTH AFRICA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.20% | [15] |
| C000095101 [Member] | KOREA, REPUBLIC OF | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.40% | [15] |
| C000095101 [Member] | TAIWAN | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.40% | [15] |
| C000095101 [Member] | TÜRKIYE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.20% | [15] |
| C000095101 [Member] | UNITED ARAB EMIRATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [15] |
| C000095101 [Member] | UNITED STATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [15] |
| C000095101 [Member] | Short Term Investments and Net Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.90% | [15] |
| C000138115 [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 100% | [16] |
| C000138115 [Member] | ARGENTINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.60% | [16] |
| C000138115 [Member] | BRAZIL | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.10% | [16] |
| C000138115 [Member] | CHINA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 26% | [16] |
| C000138115 [Member] | GREECE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.30% | [16] |
| C000138115 [Member] | HUNGARY | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [16] |
| C000138115 [Member] | INDIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16% | [16] |
| C000138115 [Member] | INDONESIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [16] |
| C000138115 [Member] | MEXICO | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [16] |
| C000138115 [Member] | PHILIPPINES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [16] |
| C000138115 [Member] | SAUDI ARABIA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.50% | [16] |
| C000138115 [Member] | SOUTH AFRICA | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.20% | [16] |
| C000138115 [Member] | KOREA, REPUBLIC OF | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.40% | [16] |
| C000138115 [Member] | TAIWAN | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 15.40% | [16] |
| C000138115 [Member] | TÜRKIYE | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 3.20% | [16] |
| C000138115 [Member] | UNITED ARAB EMIRATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [16] |
| C000138115 [Member] | UNITED STATES | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.40% | [16] |
| C000138115 [Member] | Short Term Investments and Net Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 0.90% | [16] |
| [1]Based on net assets[2]Based on net assets[3]Based on net assets[4]Based on net assets[5]Based on net assets[6]Based on net assets[7]Based on net assets[8]Based on net assets[9]Based on net assets[10]Based on net assets[11]Based on net assets[12]Based on net assets[13]Based on net assets[14]Based on net assets[15]Based on net assets[16]Based on net assets | ||
