Shareholder Report |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2026
USD ($)
Holding
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| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Document Type | N-CSR | ||||||||||||||||||||||||||||||||||||||||
| Amendment Flag | false | ||||||||||||||||||||||||||||||||||||||||
| Registrant Name | Undiscovered Managers Funds | ||||||||||||||||||||||||||||||||||||||||
| Entity Central Index Key | 0001047712 | ||||||||||||||||||||||||||||||||||||||||
| Entity Investment Company Type | N-1A | ||||||||||||||||||||||||||||||||||||||||
| Document Period End Date | Jun. 30, 2026 | ||||||||||||||||||||||||||||||||||||||||
| C000126248 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class R6 Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVFX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
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| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
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| Expenses Paid, Amount | $ 87 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.80% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class R6 Shares returned 17.45% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
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| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
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| Average Annual Return [Table Text Block] |
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| Performance Inception Date | Apr. 30, 2013 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
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| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
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| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class R6 Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
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| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000177425 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class R5 Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVVX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
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| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
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| Expenses Paid, Amount | $ 98 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.90% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class R5 Shares returned 17.34% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
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| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
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| Average Annual Return [Table Text Block] |
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| Performance Inception Date | Mar. 01, 2017 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
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| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
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| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class R5 Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
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| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000177424 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class R4 Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVUX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
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| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
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| Expenses Paid, Amount | $ 114 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 1.05% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class R4 Shares returned 17.16% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
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| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
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| Average Annual Return [Table Text Block] |
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||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | Mar. 01, 2017 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
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| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
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| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class R4 Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
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| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
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| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000177423 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class R3 Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVTX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
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| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
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| Expenses Paid, Amount | $ 141 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 1.30% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class R3 Shares returned 16.88% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
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| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
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| Average Annual Return [Table Text Block] |
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| Performance Inception Date | Mar. 01, 2017 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
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| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
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| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class R3 Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
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| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000126247 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class R2 Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVRX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
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| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
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| Expenses Paid, Amount | $ 168 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 1.55% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class R2 Shares returned 16.59% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
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| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
||||||||||||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
|
||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | Apr. 30, 2013 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
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| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
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| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class R2 Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
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| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
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| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000011783 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class L Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVLX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
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| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 98 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.90% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class L Shares returned 17.34% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
|
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| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
||||||||||||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
|
||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | Dec. 28, 1998 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
|
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| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
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| C000126246 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class I Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVSX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
|
||||||||||||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 107 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 0.99% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class I Shares returned 17.23% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
|
||||||||||||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
||||||||||||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
|
||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | Apr. 30, 2013 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
|
||||||||||||||||||||||||||||||||||||||||
| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
||||||||||||||||||||||||||||||||||||||||
| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class I Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
|
||||||||||||||||||||||||||||||||||||||||
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000011786 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class C Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVCX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
|
||||||||||||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 188 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 1.74% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class C Shares, without a sales charge, returned 16.37% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
|
||||||||||||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
||||||||||||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
|
||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | Jun. 04, 2004 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
|
||||||||||||||||||||||||||||||||||||||||
| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
||||||||||||||||||||||||||||||||||||||||
| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class C Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
|
||||||||||||||||||||||||||||||||||||||||
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| C000011784 [Member] | |||||||||||||||||||||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||||||||||||||||||||
| Fund Name | Undiscovered Managers Behavioral Value Fund | ||||||||||||||||||||||||||||||||||||||||
| Class Name | Class A Shares | ||||||||||||||||||||||||||||||||||||||||
| Trading Symbol | UBVAX | ||||||||||||||||||||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Undiscovered Managers Behavioral Value Fund (the "Fund") for the period of July 1, 2025 to June 30, 2026. | ||||||||||||||||||||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | annual shareholder report | ||||||||||||||||||||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.jpmorganfunds.com/funddocuments. You can also request this information by contacting us at 1-800-480-4111, by sending an e-mail request to Funds.Website.Support@jpmorganfunds.com or by asking any financial intermediary that offers shares of the Fund. | ||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Notice [Text Block] | This report describes material changes to the Fund that occurred during the reporting period.
|
||||||||||||||||||||||||||||||||||||||||
| Additional Information Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Email | Funds.Website.Support@jpmorganfunds.com | ||||||||||||||||||||||||||||||||||||||||
| Additional Information Website | www.jpmorganfunds.com/funddocuments | ||||||||||||||||||||||||||||||||||||||||
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
|
||||||||||||||||||||||||||||||||||||||||
| Expenses Paid, Amount | $ 134 | ||||||||||||||||||||||||||||||||||||||||
| Expense Ratio, Percent | 1.24% | ||||||||||||||||||||||||||||||||||||||||
| Factors Affecting Performance [Text Block] | How did the Fund Perform? The Undiscovered Managers Behavioral Value Fund's Class A Shares, without a sales charge, returned 16.95% for the twelve months ended June 30, 2026. The Russell 3000 Index (the "Index") returned 22.82% and the Russell 2000 Value Index returned 43.01% for the twelve months ended June 30, 2026.
|
||||||||||||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The performance quoted is past performance and is not a guarantee of future results. | ||||||||||||||||||||||||||||||||||||||||
| Line Graph [Table Text Block] | Fund Performance |
||||||||||||||||||||||||||||||||||||||||
| Average Annual Return [Table Text Block] |
|
||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | Jun. 04, 2004 | ||||||||||||||||||||||||||||||||||||||||
| No Deduction of Taxes [Text Block] | Also, performance shown in this section does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on gains resulting from redemptions of Fund shares. | ||||||||||||||||||||||||||||||||||||||||
| Material Change Date | Nov. 01, 2025 | ||||||||||||||||||||||||||||||||||||||||
| Updated Performance Information Location [Text Block] | Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111. | ||||||||||||||||||||||||||||||||||||||||
| Net Assets | $ 9,005,869,000 | ||||||||||||||||||||||||||||||||||||||||
| Holdings Count | Holding | 88 | ||||||||||||||||||||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 65,693,000 | ||||||||||||||||||||||||||||||||||||||||
| Investment Company Portfolio Turnover | 31.00% | ||||||||||||||||||||||||||||||||||||||||
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS
|
||||||||||||||||||||||||||||||||||||||||
| Holdings [Text Block] | PORTFOLIO COMPOSITION - SECTOR (% of Total Investments) |
||||||||||||||||||||||||||||||||||||||||
| Material Fund Change [Text Block] | Material changes to the Fund during the period Effective June 12, 2026, Class A Shares of the Fund are no longer subject to a limited offering. The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector. This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
||||||||||||||||||||||||||||||||||||||||
| Material Fund Change Risks Change [Text Block] | The Fund added “Industrials Sector Risk” disclosure to its summary prospectus as of November 1, 2025. This disclosure was added in light of a larger concentration of portfolio securities in this sector.
|
||||||||||||||||||||||||||||||||||||||||
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since July 1, 2025. For more complete information, you may review the Fund’s prospectus at www.jpmorganfunds/com/funddocuments or upon request at 1-800-480-4111.
|
||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Phone Number | 1-800-480-4111 | ||||||||||||||||||||||||||||||||||||||||
| Updated Prospectus Web Address | www.jpmorganfunds/com/funddocuments |