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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName JPMorgan Trust I
Prospectus Date rr_ProspectusDate Mar. 01, 2020
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading JPMorgan Opportunistic Equity Long/Short Fund Class/Ticker: A/JOELX; C/JOECX; I/JOEQX
Objective [Heading] rr_ObjectiveHeading What is the goal of the Fund?
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may qualify for sales charge discounts on purchases of Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in the J.P. Morgan Funds. More information about these and other discounts is available from your financial intermediary and in “Investing with J.P. Morgan Funds — SALES CHARGES AND FINANCIAL INTERMEDIARY COMPENSATION” on page 18 and in “Financial Intermediary-Specific Sales Charge Waivers in Appendix A of the prospectus and in “PURCHASES, REDEMPTIONS AND EXCHANGES” in Appendix A to Part II of the Statement of Additional Information. You may be required to pay a commission to your Financial Intermediary for purchases of Class I Shares. Such commissions are not reflected in the tables or the example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (Fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (Expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2/28/21
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses, or in the Example, affect the Fund’s performance. During the Fund’s most recent fiscal year, the Fund’s portfolio turnover rate (including short sales) was 1,232% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 1232.00%
Expense Footnotes [Text Block] rr_ExpenseFootnotesTextBlock “Acquired Fund (Underlying Fund) Fees and Expenses” are expenses incurred indirectly by the Fund through its ownership of shares in other investment companies, including affiliated money market funds, other mutual funds, exchange-traded funds and business development companies. The impact of Acquired Fund (Underlying Fund) Fees and Expenses is included in the total returns of the Fund. Acquired Fund (Underlying Fund) Fees and Expenses are not direct costs of the Fund, are not used to calculate the Fund’s net asset value per share and are not included in the calculation of the ratio of expenses to average net assets shown in the Financial Highlights section of the Fund’s prospectus.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on purchases of Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in the J.P. Morgan Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired Fund (Underlying Fund) Fees and Expenses are not direct costs of the Fund, are not used to calculate the Fund’s net asset value per share and are not included in the calculation of the ratio of expenses to average net assets shown in the Financial Highlights section of the Fund’s prospectus.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses are equal to the total annual fund operating expenses after fee waivers and expense reimbursements shown in the fee table through 2/28/21, and total annual fund operating expenses thereafter. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption IF YOU SELL YOUR SHARES, YOUR COST WOULD BE:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption IF YOU DO NOT SELL YOUR SHARES, YOUR COST WOULD BE:
Strategy [Heading] rr_StrategyHeading What are the Fund’s main investment strategies?
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock Under normal circumstances, the Fund will invest at least 80% of its Assets in long and short positions in equity securities, selecting from a universe of equity securities with market capitalizations similar to those included in the Russell 1000 and/or S&P 500 Index, at the time of purchase. As of October 31, 2019, the market capitalization of the companies in the Russell 1000 Index ranged from $233 million to $1,123.6 billion. As of October 31, 2019, the market capitalization of the companies in the S&P 500 Index ranged from $1.7 billion to $1,094.7 billion. “Assets” means net assets plus the amount of borrowings for investment purposes.

Part of the Fund’s investment strategy is to attempt to achieve lower volatility than that of its primary benchmark, the S&P 500 Index. Volatility management starts during the stock selection research process before inclusion in the portfolio. The Fund’s adviser will employ a number of strategies to manage the Fund’s volatility, including altering the Fund’s portfolio composition, adjusting the Fund’s gross exposure or net exposure, holding significant cash balances, or investing in options (to attempt to limit losses from stock positions). In implementing its strategy, the Fund primarily will buy or sell short common stocks, including real estate investment trusts (REITs) and depositary receipts.

As the set of investment opportunities is constantly evolving, the Fund’s net exposure (the value of the Fund’s aggregate long positions minus its short positions) will vary over time. While in most instances the net exposure will be positive (more long exposure than short exposure), it is possible that the investment opportunities result in a net short exposure. Net exposure will range from -30% to +80%. The Fund’s gross equity market exposure is limited to 200%.

Short sales involve the sale of a security which the Fund does not own in hopes of purchasing the same security at a later date at a lower price. To make delivery to the buyer, the Fund must borrow the security, and the Fund is obligated to return the security to the lender, which is accomplished by a later purchase of the security by the Fund.

Derivatives, which are instruments that have a value based on another instrument, exchange rate or index, may be used as substitutes for securities in which the Fund can invest. To the extent the Fund uses derivatives, the Fund will primarily use equity index futures contracts and options, both long and short, to gain or reduce exposure to specific investments or the overall equity market. The Fund may also invest in exchange traded funds (ETFs) for these purposes.

The Fund is non-diversified.

Investment Process: J.P. Morgan Investment Management Inc., the Fund’s adviser, employs a process that combines research, valuation and stock selection to identify investments. Long and short positions are vetted through a disciplined research process and valuation framework which leverages the insights of the adviser’s fundamental analyst platform that actively analyzes approximately 800 stocks. The adviser buys long positions in companies with strong management teams, strong competitive positions and earnings growth rates in excess of peers. Long purchases may also be companies that the adviser believes have improving investment factors, such as business drivers (revenues, profitability, capital intensity, and capital allocation), industry structure, regulatory environment and/or legal risk. Short sales generally are characterized by companies with deteriorating incremental changes in such investment factors. The adviser may also take short positions as part of its volatility management. The adviser may sell a long position or cover a short position due to a change in the company’s fundamentals, a change in the original reason for purchase of an investment, or if the adviser no longer considers the security to be reasonably valued. Investments may also be sold or covered if the adviser identifies another investment that it believes offers a better opportunity.
Risk [Heading] rr_RiskHeading The Fund’s Main Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock The Fund is subject to management risk and may not achieve its objective if the adviser’s expectations regarding particular instruments or markets are not met.

An investment in this Fund or any other fund may not provide a complete investment program. The suitability of an investment in the Fund should be considered based on the investment objective, strategies and risks described in this prospectus, considered in light of all of the other investments in your portfolio, as well as your risk tolerance, financial goals and time horizons. You may want to consult with a financial advisor to determine if this Fund is suitable for you.


The Fund is subject to the main risks noted below, any of which may adversely affect the Fund’s performance and ability to meet its investment objective.

Equity Market Risk. The price of equity securities may rise or fall because of changes in the broad market or changes in a company’s financial condition, sometimes rapidly or unpredictably. These price movements may result from factors affecting individual companies, sectors or industries selected for the Fund’s portfolio or the securities market as a whole, such as changes in economic or political conditions. When the value of the Fund’s securities goes down, your investment in the Fund decreases in value.

General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics.

Short Selling Risk. The Fund will incur a loss as a result of a short sale if the price of the security sold short increases in value between the date of the short sale and the date on which the Fund purchases the security to replace the borrowed security. In addition, a lender may request, or market conditions may dictate, that securities sold short be returned to the lender on short notice, and the Fund may have to buy the securities sold short at an unfavorable price. If this occurs, any anticipated gain to the Fund may be reduced or eliminated or the short sale may result in a loss. The Fund’s losses are potentially unlimited in a short sale transaction. Short sales are speculative transactions and involve special risks, including greater reliance on the adviser’s ability to accurately anticipate the future value of a security. Furthermore, taking short positions in securities results in a form of leverage which may cause the Fund to be more volatile.

Real Estate Securities Risk. The Fund’s investments in real estate securities, including REITs, are subject to the same risks as direct investments in real estate and mortgages, and their value will depend on the value of the underlying real estate interests. These risks include default, prepayments, changes in value resulting from changes in interest rates and demand for real and rental property, and the management skill and credit-worthiness of REIT issuers. The Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests in addition to the expenses of the Fund.

ETF and Other Investment Company Risk. The Fund may invest in shares of other investment companies, including ETFs. Shareholders will indirectly bear the expenses charged by the underlying ETFs. The price movement of an index-based ETF may not track the underlying index and may result in a loss. ETFs and closed-end investment companies may trade at a price below their net asset value (also known as a discount).

Derivatives Risk. Derivatives, including options and futures, may be riskier than other types of investments and may increase the volatility of the Fund. Derivatives may be sensitive to changes in economic and market conditions and may create leverage, which could result in losses that significantly exceed the Fund’s original investment. Certain derivatives expose the Fund to counterparty risk, which is the risk that the derivative counterparty will not fulfill its contractual obligations (and includes credit risk associated with the counterparty). Certain derivatives are synthetic instruments that attempt to replicate the performance of certain reference assets. With regard to such derivatives, the Fund does not have a claim on the reference assets and is subject to enhanced counterparty risk. Derivatives may not perform as expected, so the Fund may not realize the intended benefits. When used for hedging, the change in value of a derivative may not correlate as expected with the security or other risk being hedged. In addition, given their complexity, derivatives expose the Fund to risks of mispricing or improper valuation.

Depositary Receipts Risk. The Fund’s investments may take the form of depositary receipts, including unsponsored depositary receipts. Investments in foreign issuers and foreign securities (including depositary receipts) are subject to additional risks, including political and economic risks, civil conflicts and war, greater volatility, expropriation and nationalization risks, sanctions and other measures by the United States or other governments, currency fluctuations, possible foreign controls on investment, and less stringent investor protection and disclosure standards of foreign markets. Events and evolving conditions in certain economies or markets may alter the risks associated with investments tied to countries or regions that historically were perceived as comparatively stable becoming riskier and more volatile. Unsponsored depositary receipts may not provide as much information about the underlying issuer and may not carry the same voting privileges as sponsored depositary receipts. Unsponsored depositary receipts are issued by one or more depositaries in response to market demand, but without a formal agreement with the company that issues the underlying securities.

High Portfolio Turnover Risk. The Fund may engage in active and frequent trading leading to increased portfolio turnover, higher transaction costs, and the possibility of increased capital gains, including short-term capital gains that will generally be taxable to shareholders as ordinary income.

Non-Diversified Fund Risk. Since the Fund is non-diversified, it may invest a greater percentage of its assets in a particular issuer or group of issuers than a diversified fund would. This increased investment in fewer issuers may result in the Fund’s shares being more sensitive to economic results among those issuing the securities.

Industry and Sector Focus Risk. At times the Fund may increase the relative emphasis of its investments in a particular industry or sector. The prices of securities of issuers in a particular industry or sector may be more susceptible to fluctuations due to changes in economic or business conditions, government regulations, availability of basic resources or supplies, or other events that affect that industry or sector more than securities of issuers in other industries and sectors. To the extent that the Fund increases the relative emphasis of its investments in a particular industry or sector, its shares’ values may fluctuate in response to events affecting that industry or sector.

Transactions Risk. The Fund could experience a loss and its liquidity may be negatively impacted when selling securities to meet redemption requests by shareholders. The risk of loss increases if the redemption requests are unusually large or frequent or occur in times of overall market turmoil or declining prices. Similarly, large purchases of Fund shares may adversely affect the Fund’s performance to the extent that the Fund is delayed in investing new cash and is required to maintain a larger cash position than it ordinarily would.

Investments in the Fund are not deposits or obligations of, or guaranteed or endorsed by, any bank and are not insured or guaranteed by the FDIC, the Federal Reserve Board or any other government agency.

You could lose money investing in the Fund.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money investing in the Fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution Investments in the Fund are not deposits or obligations of, or guaranteed or endorsed by, any bank and are not insured or guaranteed by the FDIC, the Federal Reserve Board or any other government agency.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversified Fund Risk. Since the Fund is non-diversified, it may invest a greater percentage of its assets in a particular issuer or group of issuers than a diversified fund would. This increased investment in fewer issuers may result in the Fund’s shares being more sensitive to economic results among those issuing the securities.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Past Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock This section provides some indication of the risks of investing in the Fund. The bar chart shows the performance of the Fund’s Class I Shares for the past five calendar years. The table shows the average annual total returns for the past one year, five years and life of the Fund. The table compares the Fund’s performance to the performance of the S&P 500 Index and the ICE BofAML 3-Month US Treasury Bill Index. The S&P 500 Index and the ICE BofAML 3-Month US Treasury Bill Index do not include the fees and expenses of the mutual funds in the index. Past performance (before and after taxes) is not necessarily an indication of how any class of the Fund will perform in the future. Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart shows the performance of the Fund’s Class I Shares for the past five calendar years. The table shows the average annual total returns for the past one year, five years and life of the Fund.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The table compares the Fund’s performance to the performance of the S&P 500 Index and the ICE BofAML 3-Month US Treasury Bill Index. The S&P 500 Index and the ICE BofAML 3-Month US Treasury Bill Index do not include the fees and expenses of the mutual funds in the index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-480-4111
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.jpmorganfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how any class of the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading YEAR-BY-YEAR RETURNS — CLASS I SHARES
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter 3rd quarter, 2016     7.57%   
Worst Quarter 4th quarter, 2016   -4.00%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURNS (For periods ended December 31, 2019)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for the Class I Shares and after-tax returns for the other classes will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are shown only for the Class I Shares and after-tax returns for the other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases as % of the Offering Price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.25%
Maximum Deferred Sales Charge (Load) as % of Original Cost of the Shares rr_MaximumDeferredSalesChargeOverOther none [1]
Management Fees rr_ManagementFeesOverAssets 1.20%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Dividend Expense on Short Sales rr_Component1OtherExpensesOverAssets 0.46%
Service Fees rr_Component2OtherExpensesOverAssets 0.25%
Remainder of Other Expenses rr_Component3OtherExpensesOverAssets 0.20%
Other Expenses rr_OtherExpensesOverAssets 0.91%
Acquired Fund (Underlying Fund) Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.09%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.45%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.12%) [2]
Total Annual Fund Operating Expenses after Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 2.33% [2]
1 Year rr_ExpenseExampleYear01 $ 749
3 Years rr_ExpenseExampleYear03 1,238
5 Years rr_ExpenseExampleYear05 1,752
10 Years rr_ExpenseExampleYear10 3,156
1 Year rr_ExpenseExampleNoRedemptionYear01 749
3 Years rr_ExpenseExampleNoRedemptionYear03 1,238
5 Years rr_ExpenseExampleNoRedemptionYear05 1,752
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,156
Past 1 Year rr_AverageAnnualReturnYear01 (3.57%)
Past 5 Years rr_AverageAnnualReturnYear05 3.60%
Life of Fund rr_AverageAnnualReturnSinceInception 4.47%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2014
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases as % of the Offering Price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) as % of Original Cost of the Shares rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 1.20%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Dividend Expense on Short Sales rr_Component1OtherExpensesOverAssets 0.46%
Service Fees rr_Component2OtherExpensesOverAssets 0.25%
Remainder of Other Expenses rr_Component3OtherExpensesOverAssets 0.19%
Other Expenses rr_OtherExpensesOverAssets 0.90%
Acquired Fund (Underlying Fund) Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.09%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.94%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.11%) [2]
Total Annual Fund Operating Expenses after Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 2.83% [2]
1 Year rr_ExpenseExampleYear01 $ 386
3 Years rr_ExpenseExampleYear03 899
5 Years rr_ExpenseExampleYear05 1,538
10 Years rr_ExpenseExampleYear10 3,254
1 Year rr_ExpenseExampleNoRedemptionYear01 286
3 Years rr_ExpenseExampleNoRedemptionYear03 899
5 Years rr_ExpenseExampleNoRedemptionYear05 1,538
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,254
Past 1 Year rr_AverageAnnualReturnYear01 0.29%
Past 5 Years rr_AverageAnnualReturnYear05 4.21%
Life of Fund rr_AverageAnnualReturnSinceInception 5.00%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2014
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases as % of the Offering Price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) as % of Original Cost of the Shares rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 1.20%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Dividend Expense on Short Sales rr_Component1OtherExpensesOverAssets 0.46%
Service Fees rr_Component2OtherExpensesOverAssets 0.25%
Remainder of Other Expenses rr_Component3OtherExpensesOverAssets 0.19%
Other Expenses rr_OtherExpensesOverAssets 0.90%
Acquired Fund (Underlying Fund) Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.09%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.19%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.11%) [2]
Total Annual Fund Operating Expenses after Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 2.08% [2]
1 Year rr_ExpenseExampleYear01 $ 211
3 Years rr_ExpenseExampleYear03 675
5 Years rr_ExpenseExampleYear05 1,165
10 Years rr_ExpenseExampleYear10 2,515
1 Year rr_ExpenseExampleNoRedemptionYear01 211
3 Years rr_ExpenseExampleNoRedemptionYear03 675
5 Years rr_ExpenseExampleNoRedemptionYear05 1,165
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,515
2015 rr_AnnualReturn2015 9.48%
2016 rr_AnnualReturn2016 (0.52%)
2017 rr_AnnualReturn2017 15.76%
2018 rr_AnnualReturn2018 (0.83%)
2019 rr_AnnualReturn2019 2.06%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2016
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.57%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.00%)
Past 1 Year rr_AverageAnnualReturnYear01 2.06%
Past 5 Years rr_AverageAnnualReturnYear05 5.00%
Life of Fund rr_AverageAnnualReturnSinceInception 5.79%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2014
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | Return After Taxes on Distributions | Class I  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 2.03%
Past 5 Years rr_AverageAnnualReturnYear05 4.26%
Life of Fund rr_AverageAnnualReturnSinceInception 5.06%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2014
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class I  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 1.24%
Past 5 Years rr_AverageAnnualReturnYear05 3.68%
Life of Fund rr_AverageAnnualReturnSinceInception 4.31%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2014
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | S&P 500 INDEX (Reflects No Deduction for Fees, Expenses, or Taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 31.49%
Past 5 Years rr_AverageAnnualReturnYear05 11.70%
Life of Fund rr_AverageAnnualReturnSinceInception 11.62%
A, C, I Shares | JPMorgan Opportunistic Equity Long/Short Fund | ICE BOFAML 3-MONTH US TREASURY BILL INDEX (Reflects No Deduction for Fees, Expenses, or Taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 2.28%
Past 5 Years rr_AverageAnnualReturnYear05 1.07%
Life of Fund rr_AverageAnnualReturnSinceInception 1.01%
[1] (under $1 million)
[2] The Fund’s adviser and/or its affiliates have contractually agreed to waive fees and/or reimburse expenses to the extent Total Annual Fund Operating Expenses (excluding Acquired Fund (Underlying Fund) Fees and Expenses other than certain money market fund fees as described below, dividend and interest expenses related to short sales, interest, taxes, expenses related to litigation and potential litigation, expenses related to trustee elections, and extraordinary expenses) exceed 1.85%, 2.35% and 1.60% of the average daily net assets of Class A, Class C and Class I Shares, respectively. The Fund may invest in one or more money market funds advised by the adviser or its affiliates (affiliated money market funds). The Fund’s adviser, shareholder servicing agent and/or administrator have contractually agreed to waive fees and/or reimburse expenses in an amount sufficient to offset the respective net fees each collects from the affiliated money market funds on the Fund’s investment in such money market funds. These waivers are in effect through 2/28/21, at which time it will be determined whether such waivers will be renewed or revised. To the extent that the Fund engages in securities lending, affiliated money market fund fees and expenses resulting from the Fund’s investment of cash received from securities lending borrowers are not included in Total Annual Fund Operating Expenses and therefore, the above waivers do not apply to such investments.