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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName JPMorgan Trust I
Prospectus Date rr_ProspectusDate Dec. 29, 2016
R2, R5 Shares | JPMorgan Diversified Real Return Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading JPMorgan Diversified Real Return Fund

Class/Ticker: R2/JRFRX; R5/JRLRX
Objective [Heading] rr_ObjectiveHeading What is the goal of the Fund?
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund seeks to maximize long-term real return.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

"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.
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 1/31/19
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 was 95% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 95.00%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other Expenses" are based on estimated amounts for the current fiscal year. Includes the advisory fee paid by the Subsidiary to its adviser and other estimated expenses of the Subsidiary (excluding Acquired Fund (Underlying Fund) Fees and Expenses).
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Acquired Fund (Underlying Fund) Fees and Expenses" have been restated to reflect current fees.
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 1/31/19 and total annual fund operating expenses thereafter. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption WHETHER OR NOT YOU SELL YOUR SHARES, YOUR
COST WOULD BE:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption WHETHER OR NOT YOU 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 The Fund seeks real return by allocating to a diversified combination of inflation-sensitive and other asset classes that have exposure to broad equity, fixed income and alternative markets. “Real return” means the return in excess of the actual rate of inflation. The actual rate of inflation is measured by the seasonally adjusted Consumer Price Index for All Urban Consumers (CPI-U) over time.

J.P. Morgan Investment Management Inc. (JPMIM or the adviser) uses a flexible asset allocation approach in constructing the Fund’s portfolio. Ranges for the broad asset classes are:

Global Equity     10–60 % 
Commodities & Alternatives     0–50 % 
Fixed Income & Cash Equivalents     10–80 % 

The Fund’s equity investments may include common stock, real estate investment trusts (REITs), depositary receipts, warrants and rights to buy common stocks, and master limited partnerships (MLPs). Such investments may include securities throughout the world, in both developed and emerging markets. Equity investments include investments with exposure to natural resources or infrastructure, including companies that provide services such as transportation systems, water supply and power. The Fund may invest in companies of any market capitalizations including small, mid, and large capitalization companies.

The Fund’s fixed income investments may include inflation-indexed bonds, inflation-linked securities such as Treasury Inflation Protected Securities (TIPS), floating rate securities, loan assignments and participations (Loans), commitments to purchase Loans (Unfunded Commitments), bank obligations, U.S. government securities (including agencies and instrumentalities), domestic and foreign corporate bonds and debt securities, high yield securities (junk bonds), debt obligations issued or guaranteed by a foreign sovereign government or its agencies, authorities or political subdivisions, asset-backed securities, mortgage-backed and mortgage-related securities, private placements and cash equivalents. Such securities may be structured as collateralized mortgage obligations (CMOs) and stripped mortgage-backed securities, including those structured such that payments consist of interest-only (IO), principal-only (PO) or principal and interest. The Fund also may invest in inverse floaters and inverse IOs, which are debt securities with interest rates that reset in the opposite direction from the market rate to which the security is indexed. Cash equivalents are highly liquid, high-quality instruments with maturities of three months or less on the date they are issued. The Fund uses cash equivalents as part of its principal investment strategy including securities issued by the U.S. government, its agencies and instrumentalities, certificates of deposit, bankers’ acceptances, commercial paper, variable rate master demand notes, money market mutual funds and bank deposit accounts. The Fund may invest in securities of any duration, maturity, or quality. Income securities may include sub-prime mortgage-related securities.

The Fund’s alternative investments may include individual securities including convertible securities and preferred stock and exchange traded commodities (ETCs). The investments in this asset class may give the Fund exposure to: market neutral strategies, long/short strategies, merger arbitrage strategies, currencies and commodities. Market neutral strategies involve buying equities that the adviser considers to be attractive and short selling equities that the adviser considers to be unattractive to neutralize exposure to market risk and to exploit potential price inefficiencies between related equity securities. Long/short strategies involve purchasing securities that the adviser believes are undervalued and selling securities short or taking short positions in such securities through the use of derivatives that the adviser believes are overvalued. Merger arbitrage strategies involve buying the stock of one merging company and selling short the other merging company to capitalize on potential price discrepancies and returns generated by a corporate transaction.

The Fund may gain exposure to the commodities and certain other alternative markets by investing up to 25% of its total assets in the Diversified Real Return Fund CS Ltd., a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (the Subsidiary). The Subsidiary is also advised by the adviser and has the same investment objective as the Fund. The Subsidiary (unlike the Fund) may invest without limitation in commodity futures contracts, commodity-linked swap agreements and other commodity-linked derivative instruments, including derivative instruments linked to the value of a particular commodity, commodity index or commodity futures contract, or a subset of commodities or commodity futures contracts. However, the Subsidiary is otherwise subject to the same fundamental, non-fundamental and certain other investment restrictions as the Fund.

The Subsidiary may use derivatives to obtain long or short exposure in an attempt to increase the Subsidiary’s income or gain, to hedge various investments and for risk management. The Subsidiary may also use swaps that are based on the Non-Seasonally Adjusted Consumer Price Index for all Urban Consumers (CPI-U) as part of the inflation-managed strategy of the Fund. In rising markets, the Fund expects that the value of the long positions will appreciate more rapidly than the short positions, and in declining markets, that the value of the short positions will appreciate more rapidly than the long positions. The Fund’s or the Subsidiary’s investments in commodity-linked derivative instruments may deviate from the returns of any particular commodity index. The Fund or the Subsidiary may also overweight or underweight its exposure to a subset of commodities, such that the Fund has greater or lesser exposure to a subset of commodities than is represented by a particular commodity index.

The Fund may invest in other J.P. Morgan Funds and exchange traded funds (ETFs) including ETFs advised by JPMIM or its affiliates (Underlying Funds) and exchange traded notes (ETNs) in order to gain exposure to an inflation-sensitive asset class, a broad asset class or sector.

In addition, the Fund may utilize derivatives. Derivatives are instruments that have a value based on another instrument, exchange rate or index. The Fund may utilize forward currency transactions to hedge exposure to non-dollar denominated investments back to the U.S. dollar. The Fund may use futures contracts, options, forwards, and swaps to more effectively gain targeted equity and fixed income exposure from its cash positions, to hedge investments, for risk management and to attempt to increase the Fund’s gain. The Fund may also utilize exchange traded futures for cash management, to gain exposure to asset classes, or as part of the Fund’s asset allocation strategy. As part of its real return strategy, the Fund may also hedge inflation risk by using CPI-U swaps in combination with its securities. The Fund also may utilize commodity-linked derivatives or commodity swaps in order to gain exposure to the commodities market.

The Fund may enter into short sales either directly or through investments in Underlying Funds or the Subsidiary. In short selling transactions, the Fund sells a security it does not own in anticipation of a decline in the market value of the security. To complete the transaction, the Fund must borrow the security to make delivery to the buyer. The Fund is obligated to replace the security borrowed by purchasing it subsequently at the market price at the time of replacement.

The portfolio managers use a flexible asset allocation approach in managing the Fund and allocate the Fund’s investments among individual investment strategies that are managed by JPMIM portfolio management teams or underlying funds. Asset allocation decisions are primarily inflation focused based on the adviser’s evaluations of U.S. price trends as measured by the CPI-U and the relative attractiveness of the broad asset classes in which the Fund invests. The adviser employs a four-step process that combines 1) long-term asset allocation research, 2) making asset allocation decisions based on the portfolio managers’ intermediate market term outlook, 3) constructing the portfolio and analyzing the investment capabilities of any underlying funds and/or portfolio managers responsible for individual investment strategies, and 4) monitoring portfolio exposures and weightings and rebalancing in response to market price action and changes in JPMIM’s market outlook. Throughout this process, the adviser conducts extensive research on inflationary markets and the inflation hedging capabilities of various asset classes. Buy and sell decisions for a particular strategy are made by the portfolio management teams responsible for individual investment strategies based on such portfolio management team’s investment processes, which may include bottom-up or top-down security selection processes, quantitative research, value or growth investing, passive or index investing and other investment processes applicable to such portfolio management teams.
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 about particular instruments or markets are not met. The Fund is exposed to the risks summarized below through both its direct investments and investments in the Subsidiary and/or the underlying funds.

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.

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 the general financial markets, a particular financial market or other asset classes, due to a number of factors, including inflation, interest rates, global demand for particular products or resources, natural disasters or events, terrorism, regulatory events and government controls.

Strategy Risk. The Fund’s investment strategies may not work to maximize real return. The Fund may invest in derivatives and debt securities to mimic a portfolio of inflation-protected bonds either directly or through its Subsidiary or an underlying fund. There is no guarantee that this strategy will be effective. In addition, the Fund may have exposure to inflation-protected securities. Unlike conventional bonds, the principal or interest on inflation-protected securities such as TIPS is adjusted periodically to a specified rate of inflation (e.g., seasonally adjusted CPI-U). There can be no assurance that the inflation index used will accurately measure the actual rate of inflation. These securities may lose value in the event that the actual rate of inflation is different than the rate of the inflation index. The Fund may also have exposure to certain types of securities as a proxy for inflation-protected securities such as REITs, real estate, commodities or infrastructure. These investments may not reflect the impact of inflation.

Securities of Real Estate Companies and REITs Risk. Investments in real estate securities, including REITs, are subject to the same risks as direct investments in real estate and will depend on the value of the underlying real estate. These risks include default, prepayment, changes in value resulting from changes in interest rates and demand for real and rental property, and the management skill and creditworthiness of REIT issuers. The Fund and the underlying funds will indirectly bear their proportionate share of expenses, including management fees, paid by each REIT in which they invest in addition to the expenses of the Fund and the underlying funds.

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.

Infrastructure Risk. Infrastructure-related companies are subject to a variety of factors that may adversely affect their business or operations including high interest costs, costs associated with compliance with and changes in environmental and other regulations, difficulty in raising capital, increased competition, and uncertainty concerning the availability of fuel at reasonable prices and other factors. Infrastructure-related securities may be issued by companies that are highly leveraged, less creditworthy or financially distressed (also known as junk bonds). These investments are considered to be speculative and are subject to greater risk of loss, greater sensitivity to interest rate and economic changes, valuation difficulties, and potential illiquidity. Infrastructure-related companies may also be subject to “Foreign Securities and Emerging Markets Risk.”

Foreign Securities and Emerging Markets Risk. 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 or other measures by the United States or other governments, liquidity risks, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, and less stringent investor protection and disclosure standards of foreign markets. In certain markets where securities and other instruments are not traded “delivery versus payment,” the Fund may not receive timely payment for securities or other instruments it has delivered or receive delivery of securities paid for and may be subject to increased risk that the counterparty will fail to make payments or delivery when due or default completely.

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. These risks are magnified in “emerging markets”. Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.

Geographic Focus Risk. The Fund may focus its investments in one or more regions or small groups of countries. As a result, the Fund’s performance may be subject to greater volatility than a more geographically diversified fund.

Income Securities Risk. Investments in income securities are subject to interest rate risk and credit risk. The Fund’s exposure to bonds and other debt securities will change in value based on changes in interest rates. If rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value. The Fund may invest in variable and floating rate loan assignments and participations (Loans) and other variable and floating rate securities. Although these instruments are generally less sensitive to interest rate changes than other fixed rate instruments, the value of floating rate Loans and other investments may decline if their interest rates do not rise as quickly, or as much, as general interest rates. Given the historically low interest rate environment, risks associated with rising rates are heightened.

Income securities are also subject to the risk that issuers and/or counterparties will not make payments on securities or other investments held by the Fund when due or default completely. Prices of the Fund’s investments may be adversely affected if any of the issuers or counterparties it is invested in are subject to an actual or perceived deterioration in their credit quality. Credit spreads may increase, which may reduce the market values of the Fund’s securities. Credit spread risk is the risk that economic and market conditions or any actual or perceived credit deterioration may lead to an increase in the credit spreads (i.e., the difference in yield between two securities or similar maturity but different credit quality) and a decline in price of the issuer’s securities.

Equity Securities Risk. Exposure to equity securities (such as stocks) creates more volatility and carries more risks than some other forms of investment. The price of equity securities may rise or fall because of economic or political changes 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 or the securities market as a whole, such as changes in economic or political conditions.

Preferred Stock Risk. Preferred stock generally has a preference as to dividends and liquidation over an issuer’s common stock but ranks junior to debt securities in an issuer’s capital structure. Unlike interest payments on debt securities, preferred stock dividends are payable only if declared by the issuer’s board of directors. Preferred stock also may be subject to optional or mandatory redemption provisions.

Derivatives Risk. Derivatives, including forward currency contracts, futures, and commodity-linked derivatives and swaps, may be riskier than other types of investments because they may be more sensitive to changes in economic and market conditions and could result in losses that significantly exceed the Fund’s original investment. Many derivatives create leverage thereby causing the Fund to be more volatile than it would have been if it had not been exposed to such derivatives. Derivatives also expose the Fund to counterparty risk (the risk that the derivative counterparty will not fulfill its contractual obligations), including the credit risk of the derivative 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 being hedged. In addition, given their complexity, derivatives expose the Fund to risks of mispricing or improper valuation.

High Yield Securities and Loan Risk. The Fund may be exposed to investments in instruments including junk bonds, Loans, Unfunded Commitments and instruments that are issued by companies that are highly leveraged, less creditworthy or financially distressed. These investments are considered to be speculative and may be subject to greater risk of loss, greater sensitivity to economic changes, valuation difficulties, and potential illiquidity. Such investments may be subject to additional risks including subordination to other creditors, no collateral or limited rights in collateral, lack of a regular trading market, extended settlement periods, liquidity risks, prepayment risks, potentially less protection under the federal securities laws and lack of publicly available information. High yield securities and Loans that are deemed to be liquid at the time of purchase may become illiquid.

No active trading market may exist for some instruments and certain investments may be subject to restrictions on resale. In addition, the settlement period for Loans is uncertain as there is no standardized settlement schedule applicable to such investments. The inability to dispose of the Fund’s securities and other investments in a timely fashion could result in losses to the Fund. Because some instruments may have a more limited secondary market, liquidity risk is more pronounced for the Fund than for funds that invest primarily in other types of fixed income instruments or equity securities. When Loans and other instruments are prepaid, the Fund may have to reinvest in instruments with a lower yield or fail to recover additional amounts (i.e., premiums) paid for these instruments, resulting in an unexpected capital loss and/or a decrease in the amount of dividends and yield. Certain Loans may not be considered securities under the federal securities laws and, therefore, investments in such Loans may not be subject to certain protections under those laws. In addition, the adviser may not have access to material non-public information to which other investors may have access.

Convertible Securities Risk. The value of convertible securities tends to decline as interest rates rise and, because of the conversion feature, tends to vary with fluctuations in the market value of the underlying securities. Convertible securities are usually subordinated to comparable nonconvertible securities. Convertible securities generally do not participate directly in any dividend increases or decreases of the underlying securities, although the market prices of convertible securities may be affected by any dividend changes or other changes in the underlying securities.

Inflation-Protected Securities Risk. Inflation-linked debt securities are subject to the effects of changes in market interest rates caused by factors other than inflation (real interest rates). In general, the price of an inflation-linked security tends to decline when real interest rates increase. Unlike conventional bonds, the principal and interest payments of inflation-protected securities such as TIPS are adjusted periodically to a specified rate of inflation (e.g., CPI-U). There can be no assurance that the inflation index used will accurately measure the actual rate of inflation. These securities may lose value in the event that the actual rate of inflation is different than the rate of the inflation index.

Commodity Risk. The Fund’s investment in commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities, particularly if the instruments involve leverage. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as drought, floods, weather, livestock disease, embargoes, tariffs and international economic, political and regulatory developments. Use of leveraged commodity-linked derivatives creates an opportunity for increased return but, at the same time, creates the possibility for greater loss (including the likelihood of greater volatility of the Fund’s net asset value), and there can be no assurance that the Fund’s use of leverage will be successful.

Swap Agreement Risk. In addition to the risks associated with derivatives in general, the Fund will also be subject to risks related to swap agreements. The Fund and the Subsidiary may use swaps to establish both long and short positions in order to gain the desired exposure. The Fund’s losses are potentially unlimited in short sale positions. Short sales are speculative transactions and involve special risks, including greater reliance on the adviser’s ability to accurately anticipate the future value of an instrument. Because swap agreements are not exchange traded, but are private contracts into which the Fund and a swap counterparty enter as principals, the Fund may experience a loss or delay in recovering assets if the counterparty defaults on its obligations.

Counterparty Risk. Commodity-linked derivatives, repurchase agreements, swap agreements and other forms of financial instruments that involve counterparties subject the Fund to the risk that the counterparty could default on its obligations under the agreement, either through the counterparty’s bankruptcy or failure to perform its obligations. In the event of default, the Fund could experience lengthy delays in recovering some or all of its assets or no recovery at all.

Tax Risk. The Fund gains exposure to the commodities markets through investments in commodity-linked derivative instruments, including commodity index-linked notes, swap agreements including CPI-U swaps, commodity options, futures, and options on futures. The Fund may gain exposure indirectly to commodity markets by investing in its Subsidiary, which invests primarily in commodity-linked derivative instruments. In order for the Fund to qualify as a regulated investment company under Subchapter M of Internal Revenue Code, as amended (the Code), the Fund must derive at least 90 percent of its gross income each taxable year from certain qualifying sources of income. The Fund’s intention to qualify as a regulated investment company may limit its ability to make certain investments including, without limitation, investments in certain commodity-linked derivatives. The IRS has issued a revenue ruling which holds that income derived from certain commodity-linked swaps is not qualifying income under Subchapter M of the Code. The IRS has issued private letter rulings to other taxpayers in which the IRS concluded that income from certain commodity-linked notes is qualifying income and that income derived from a wholly-owned subsidiary will also constitute qualifying income. While the Fund might apply for its own private letter ruling from the IRS confirming that income from the Fund’s investment in certain commodity-linked notes and income from the Fund’s investment in the Subsidiary will constitute qualifying income, there can be no assurance that the IRS will issue the ruling to the Fund or that the IRS will not change its position that income derived from commodity-linked notes and wholly-owned subsidiaries is qualifying income. The IRS currently has suspended issuing these types of private letter rulings pending further internal review. The tax treatment of commodity-linked notes, other commodity-linked derivatives and the Fund’s investments in the Subsidiary may be adversely affected by future legislation, Treasury regulations and/or guidance issued by the IRS that could affect whether income from such investments is qualifying income under Subchapter M of the Code, or otherwise alter the character, timing and/or amount of the Fund’s taxable income or any gains and distributions made by the Fund. The Fund’s investment in the Subsidiary and its use of commodity-linked notes involve specific risks. See “Subsidiary Risk” for further information regarding the Subsidiary, including the risks associated with investing in the Subsidiary. See “Commodity Risk” and “Derivatives Risk” for further information regarding commodity-linked notes, including the risks associated with these instruments.

Subsidiary Risk. By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. The derivatives and other investments held by the Subsidiary are generally similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. These risks are described elsewhere in this prospectus. There can be no assurance that the investment objective of the Subsidiary will be achieved. The Subsidiary is not registered under the Investment Company Act of 1940 (1940 Act), and is not subject to all the investor protections of the 1940 Act. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as described in this prospectus and could adversely affect the Fund.

Investment Company and ETF Risk. Shareholders bear both their proportionate share of the Fund’s expenses and similar expenses of the underlying funds. Because the adviser or its affiliates provide services and receive fees from the underlying J.P. Morgan Funds, the Fund’s investments in such underlying funds benefit the adviser and/or its affiliates. In addition, the Fund may hold a significant percentage of the shares of an underlying fund. As a result, the Fund’s investments in an underlying fund may create a conflict of interest. Certain ETFs and other underlying funds may not be actively managed. Securities may be purchased, held and sold by such funds when an actively managed fund would not do so. ETFs may trade at a price below their net asset value (also known as a discount).

Asset-Backed, Mortgage-Related and Mortgage-Backed Securities Risk. The Fund may invest in asset-backed, mortgage-related and mortgage-backed securities including so-called “sub-prime” mortgages that are subject to certain other risks including prepayment and call risks. When mortgages and other obligations are prepaid and when securities are called, the Fund may have to reinvest in securities with a lower yield or fail to recover additional amounts (i.e., premiums) paid for securities with higher interest rates, resulting in an unexpected capital loss and/or a decrease in the amount of dividends and yield. In periods of rising interest rates, the Fund may be subject to extension risk, and may receive principal later than expected. As a result, in periods of rising interest rates, the Fund may exhibit additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and/or become illiquid.

Collateralized mortgage obligations (CMOs) and stripped mortgage-backed securities, including those structured as interest-only (IOs) and principal-only (POs), are more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default, as described under “Income Securities Risk”, for “sub-prime” mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex and there may be less available information than other types of debt securities.

The Fund will be exposed to additional risk to the extent that it uses inverse floaters and inverse IOs, which are debt securities with interest rates that reset in the opposite direction from the market rate to which the security is indexed. These securities are more volatile and more sensitive to interest rate changes than other types of debt securities. If interest rates move in a manner not anticipated by the adviser, the Fund could lose all or substantially all of its investment in inverse IOs.

Prepayment Risk. The issuer of certain securities may repay principal in advance, especially when yields fall. Changes in the rate at which prepayments occur can affect the return on investment of these securities. When debt obligations are prepaid or when securities are called, the Fund may have to reinvest in securities with a lower yield. The Fund also may fail to recover additional amounts (i.e., premiums) paid for securities with higher coupons, resulting in an unexpected capital loss.

Natural Resources Risk. Equity and equity-like securities of natural resources companies and associated businesses may be negatively impacted by variations, often rapid, in the commodities markets, the supply of and demand for specific products and services, the supply of and demand for oil and gas, the price of oil and gas, exploration and production spending, government regulation, economic conditions, events relating to international political developments, environmental incidents, energy conservation and the success of exploration projects. Therefore, the securities of companies in the natural resources sector may experience more price volatility than securities of companies in other industries.

Privately Placed Securities Risk. Privately placed securities generally are less liquid than publicly traded securities and the Fund may not always be able to sell such securities without experiencing delays in finding buyers or reducing the sale price for such securities. The disposition of some of the securities held by the Fund may be restricted under federal securities laws or by the relevant exchange or by governmental or supervisory authority. As a result, the Fund may not be able to dispose of such investments at a time when, or at a price at which, it desires to do so and may have to bear expenses of registering these securities, if necessary. These securities may also be difficult to value.

MLP Risk. MLPs may trade infrequently and in limited volume and they may be subject to more abrupt or erratic price movements than securities of larger or more broadly-based companies. MLPs are subject to “commodity risks” as well as the risks associated with the specific industry or industries in which the partnership invests. The managing general partner of an MLP may receive an incentive allocation based on increases in the amount and growth of cash distributions to investors in the MLP. This method of compensation may create an incentive for the managing general partner to make investments that are riskier or more speculative than would be the case in the absence of such compensation arrangements. Certain MLPs may operate in, or have exposure to, the energy sector. The energy sector can be significantly affected by changes in the prices and supplies of oil and other energy fuels, energy conservation, the success of exploration projects, and tax and other government regulations, policies of the Organization of Petroleum Exporting Countries (OPEC) and relationships among OPEC members and between OPEC and oil importing nations.

Exchange Traded Notes Risk. The value of an ETN may be influenced by time to maturity, level of supply and demand for the ETN, volatility and lack of liquidity in underlying commodities markets, changes in the applicable interest rates, changes in the issuer’s credit rating and economic, legal, political or geographic events that affect the referenced commodity. The value of the ETN may drop due to a downgrade in the issuer’s credit rating, even if the underlying index remains unchanged. Investments in ETNs are subject to the risks facing income securities in general including the risk that a counterparty will fail to make payments when due or default.

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.

High Portfolio Turnover Risk. The Fund will likely 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.

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.
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 how the performance of the Fund’s Class R5 Shares has varied from year to year over the past four calendar years. The table shows the average annual total returns for the past one year and life of the Fund. The table compares that performance to the Bloomberg Barclays 1-10 Year U.S. TIPS Index, a broad-based securities market index, the Consumer Price Index for All Urban Consumers-Seasonally Adjusted, the Diversified Real Return Composite Benchmark, a customized benchmark, and the Lipper Alternative Global Macro Funds Index. The Diversified Real Return Composite Benchmark is a composite benchmark of unmanaged indexes that consists of MSCI World (45%) and Bloomberg Barclays 1-10 Year U.S. TIPS (55%) indexes. The Lipper index is based on the total return of certain mutual funds within the Fund’s designated category as determined by Lipper. Unlike the other indexes, the Lipper index includes the fees and expenses of the mutual funds included in the index. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-480-4111.

Effective July 29, 2016, the Fund's investment strategies changed. The Fund's past performance would have been different if the Fund were managed using the current strategies.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart shows how the performance of the Fund's Class R5 Shares has varied from year to year over the past four calendar years. The table shows the average annual total returns for the past one year and life of the Fund.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The table compares that performance to the Bloomberg Barclays 1-10 Year U.S. TIPS Index, a broad-based securities market index, the Consumer Price Index for All Urban Consumers-Seasonally Adjusted, the Diversified Real Return Composite Benchmark, a customized benchmark, and the Lipper Alternative Global Macro Funds Index. The Diversified Real Return Composite Benchmark is a composite benchmark of unmanaged indexes that consists of MSCI World (45%) and Bloomberg Barclays 1-10 Year U.S. TIPS (55%) indexes. The Lipper index is based on the total return of certain mutual funds within the Fund’s designated category as determined by Lipper. Unlike the other indexes, the Lipper index includes the fees and expenses of the mutual funds included 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 the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading YEAR-BY-YEAR RETURNS – CLASS R5 SHARES
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter    2nd quarter, 2014         3.63%   
Worst Quarter   

3rd quarter, 2015

      –4.43%   

The Fund’s year-to-date total return through 9/30/16 was 8.52%. 
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURNS
(For periods ended December 31, 2015)
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 the investor's tax situation and may differ from those shown, and 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 for only the Class R5 Shares and after-tax returns for the other class will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are shown for only the Class R5 Shares and after-tax returns for the other class 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 the investor’s tax situation and may differ from those shown, and 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.
R2, R5 Shares | JPMorgan Diversified Real Return Fund | Class R2  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.50%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Shareholder Service Fees rr_Component1OtherExpensesOverAssets 0.25%
Remainder of Other Expenses rr_Component2OtherExpensesOverAssets 1.14%
Other Expenses rr_OtherExpensesOverAssets 1.39% [1]
Acquired Fund (Underlying Fund) Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.11% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.50%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (1.10%) [3]
Total Annual Fund Operating Expenses After Fee Waivers and Expense Reimbursements rr_NetExpensesOverAssets 1.40% [3]
1 Year rr_ExpenseExampleYear01 $ 143
3 Years rr_ExpenseExampleYear03 552
5 Years rr_ExpenseExampleYear05 1,117
10 Years rr_ExpenseExampleYear10 2,656
1 Year rr_ExpenseExampleNoRedemptionYear01 143
3 Years rr_ExpenseExampleNoRedemptionYear03 552
5 Years rr_ExpenseExampleNoRedemptionYear05 1,117
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,656
Past 1 Year rr_AverageAnnualReturnYear01 (6.40%)
Life of Fund rr_AverageAnnualReturnSinceInception (1.28%)
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
R2, R5 Shares | JPMorgan Diversified Real Return Fund | Class R5  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.50%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Service Fees rr_Component1OtherExpensesOverAssets 0.05%
Remainder of Other Expenses rr_Component2OtherExpensesOverAssets 0.96%
Other Expenses rr_OtherExpensesOverAssets 1.01% [1]
Acquired Fund (Underlying Fund) Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.11% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.62%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.87%) [3]
Total Annual Fund Operating Expenses After Fee Waivers and Expense Reimbursements rr_NetExpensesOverAssets 0.75% [3]
1 Year rr_ExpenseExampleYear01 $ 77
3 Years rr_ExpenseExampleYear03 328
5 Years rr_ExpenseExampleYear05 704
10 Years rr_ExpenseExampleYear10 1,763
1 Year rr_ExpenseExampleNoRedemptionYear01 77
3 Years rr_ExpenseExampleNoRedemptionYear03 328
5 Years rr_ExpenseExampleNoRedemptionYear05 704
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,763
2012 rr_AnnualReturn2012 3.17%
2013 rr_AnnualReturn2013 (1.52%)
2014 rr_AnnualReturn2014 1.94%
2015 rr_AnnualReturn2015 (5.86%)
Year to Date Return, Label rr_YearToDateReturnLabel The Fund's year-to-date total return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 8.52%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2014
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.63%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.43%)
Past 1 Year rr_AverageAnnualReturnYear01 (5.86%)
Life of Fund rr_AverageAnnualReturnSinceInception (0.68%)
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
R2, R5 Shares | JPMorgan Diversified Real Return Fund | Return After Taxes on Distributions | Class R5  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (6.71%)
Life of Fund rr_AverageAnnualReturnSinceInception (1.44%)
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
R2, R5 Shares | JPMorgan Diversified Real Return Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class R5  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (3.29%)
Life of Fund rr_AverageAnnualReturnSinceInception (0.80%)
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
R2, R5 Shares | JPMorgan Diversified Real Return Fund | BLOOMBERG BARCLAYS 1-10 YEAR U.S. TIPS INDEX (Reflects No Deduction for Fees, Expenses or Taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (0.52%)
Life of Fund rr_AverageAnnualReturnSinceInception 1.23%
R2, R5 Shares | JPMorgan Diversified Real Return Fund | CONSUMER PRICE INDEX FOR ALL URBAN CONSUMERS-SEASONALLY ADJUSTED (Reflects No Deduction for Fees, Expenses or Taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 0.67%
Life of Fund rr_AverageAnnualReturnSinceInception 1.38%
R2, R5 Shares | JPMorgan Diversified Real Return Fund | DIVERSIFIED REAL RETURN COMPOSITE BENCHMARK (Reflects No Deduction for Fees, Expenses or Taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (0.45%)
Life of Fund rr_AverageAnnualReturnSinceInception 3.97%
R2, R5 Shares | JPMorgan Diversified Real Return Fund | LIPPER ALTERNATIVE GLOBAL MACRO FUNDS INDEX (Reflects No Deduction for Taxes)  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (4.22%)
Life of Fund rr_AverageAnnualReturnSinceInception 1.00%
[1] “Other Expenses” are based on estimated amounts for the current fiscal year. Includes the advisory fee paid by the Subsidiary to its adviser and other estimated expenses of the Subsidiary (excluding Acquired Fund (Underlying Fund) Fees and Expenses).
[2] “Acquired Fund (Underlying Fund) Fees and Expenses” have been restated to reflect current fees.
[3] 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 inclusive of the Subsidiary (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, and extraordinary expenses) exceed 1.30% and 0.65% of the average daily net assets of Class R2 and Class R5 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 affiliate money market funds on the Fund's investment in such money market funds. These waivers are in effect through 1/31/19, at which time the adviser and/or its affiliates will determine whether to renew or revise them.