JPMorgan Corporate Bond Fund Investment Strategy - R6 Shares [Member] - JPMorgan Corporate Bond Fund	Feb. 28, 2026
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">What are the Fund’s main investment strategies?</span>
Strategy Narrative [Text Block]	The Fund mainly invests in corporate bonds that are rated investment grade by a nationally recognized statistical rating organization or in securities that are unrated but are deemed by the Fund’s adviser, J.P. Morgan Investment Management Inc. (JPMIM or the adviser) to be of comparable quality. Under normal circumstances, the Fund invests at least 80% of its assets in corporate bonds. “Assets” means net assets plus the amount of borrowings for investment purposes. A “corporate bond” is defined as a debt security issued by a corporation or non-governmental entity with a maturity of 90 days or more at the time of its issuance. As part of its principal strategy, the Fund invests in corporate bonds structured as corporate debt securities, debt securities of real estate investment trusts (REITs) and master limited partnerships (MLPs), public or private placements, restricted securities and other unregistered securities.The Fund is managed relative to the Bloomberg US Corporate Index (the benchmark). Under normal circumstances, the Fund’s duration is the duration of the benchmark, plus or minus one year. Duration is a measure of price sensitivity of a debt security or a portfolio of debt securities to relative changes in interest rates. For instance, a duration of “five years” means that a security’s or portfolio’s price would be expected to decrease by approximately 5% with a 1% increase in interest rates (assuming a parallel shift in yield curve). As of May 29, 2026, the duration of the benchmark was 6.76 years. The Fund will not invest more than 25% of the value of its total assets in the securities of companies conducting their principal business activities in the same industry, except that, to the extent that an industry represents 20% or more of the Fund’s benchmark at the time of investment, the Fund may invest up to 35% of its total assets in that industry. The Fund may invest in U.S. dollar-denominated securities of foreign issuers. In addition, up to 20% of the Fund’s total assets may be invested in securities rated below investment grade or unrated securities deemed by the adviser to be of comparable quality (also known as junk bonds or high yield bonds) and securities denominated in foreign currencies (some of which may be below investment grade securities). The Fund’s investments in high yield securities may include so-called “distressed debt.” Distressed debt includes securities of issuers experiencing financial or operating difficulties, securities where the issuer has defaulted in the payment of interest or principal or in the performance of its covenants or agreements, securities of issuers that may be involved in bankruptcy proceedings, reorganizations or financial restructurings or securities of issuers operating in troubled industries. The Fund seeks to hedge its non-dollar investments back to the U.S. dollar, but may not always be able to do so. In addition to direct investments in securities, 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. The Fund may use futures contracts, options, swaps and currency derivatives as tools in the management of portfolio assets. The Fund may use derivatives to hedge various investments, for risk management and/or to increase income or gain to the Fund. In particular, the Fund may invest in futures and swaps structured as interest rate swaps to manage duration relative to the benchmark. The Fund may also utilize foreign currency derivatives such as currency forwards, futures, and foreign exchange swaps to hedge its non-dollar investments back to the U.S. dollar. Although the Fund predominantly invests in corporate bonds, the Fund may also invest in U.S. Treasury securities including for cash management purposes and for duration management. The adviser buys and sells investments for the Fund using a three part process that includes determining: (1) macro credit strategy, (2) sector strategy, and (3) security strategy. In establishing the Fund’s macro credit strategy, the adviser evaluates fundamental, technical and valuation factors, along with macro themes from the adviser’s broader fixed income team, to determine the view on risk for the Fund overall. In the second component of the process, the adviser evaluates sectors based on a blend of top down analysis, including relative value judgments, and bottom up fundamental analysis of companies and their respective sectors to determine sector weightings. The third component of the process focuses on an evaluation of individual companies based on fundamental credit metrics, as well as a review of each company’s competitive environment, event risk and technical factors such as supply, liquidity of debt issued by the company and equity performance. As part of its security strategy, the adviser seeks to assess the impact of environmental, social and governance (ESG) factors on many issuers in the universe in which the Fund may invest. The adviser’s assessment is based on an analysis of key opportunities and risks across industries to seek to identify financially material issues with respect to the Fund’s investments in issuers and ascertain key issues that merit engagement with issuers. These assessments may not be conclusive and securities of issuers that may be negatively impacted by such factors may be purchased and retained by the Fund while the Fund may divest or not invest in securities of issuers that may be positively impacted by such factors. Based on the three part process, the adviser overweights and underweights its sector and security investments relative to the benchmark. As part of its principal investment strategy and for temporary defensive purposes, any portion of the Fund’s total assets may be invested in cash and cash equivalents.

JPMorgan Corporate Bond Fund Investment Strategy - R6 Shares [Member] - JPMorgan Corporate Bond Fund

Feb. 28, 2026

<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">What are the Fund’s main investment strategies?</span>

Strategy Narrative [Text Block]

The Fund mainly invests in corporate bonds that are rated investment grade by a nationally recognized statistical rating organization or in securities that are unrated but are deemed by the Fund’s adviser, J.P. Morgan Investment Management Inc. (JPMIM or the adviser) to be of comparable quality. Under normal circumstances, the Fund invests at least 80% of its assets in corporate bonds. “Assets” means net assets plus the amount of borrowings for investment purposes. A “corporate bond” is defined as a debt security issued by a corporation or non-governmental entity with a maturity of 90 days or more at the time of its issuance. As part of its principal strategy, the Fund invests in corporate bonds structured as corporate debt securities, debt securities of real estate investment trusts (REITs) and master limited partnerships (MLPs), public or private placements, restricted securities and other unregistered securities.The Fund is managed relative to the Bloomberg US Corporate Index (the benchmark). Under normal circumstances, the Fund’s duration is the duration of the benchmark, plus or minus one year. Duration is a measure of price sensitivity of a debt security or a portfolio of debt securities to relative changes in interest rates. For instance, a duration of “five years” means that a security’s or portfolio’s price would be expected to decrease by approximately 5% with a 1% increase in interest rates (assuming a parallel shift in yield curve). As of May 29, 2026, the duration of the benchmark was 6.76 years. The Fund will not invest more than 25% of the value of its total assets in the securities of companies conducting their principal business activities in the same industry, except that, to the extent that an industry represents 20% or more of the Fund’s benchmark at the time of investment, the Fund may invest up to 35% of its total assets in that industry. The Fund may invest in U.S. dollar-denominated securities of foreign issuers. In addition, up to 20% of the Fund’s total assets may be invested in securities rated below investment grade or unrated securities deemed by the adviser to be of comparable quality (also known as junk bonds or high yield bonds) and securities denominated in foreign currencies (some of which may be below investment grade securities). The Fund’s investments in high yield securities may include so-called “distressed debt.” Distressed debt includes securities of issuers experiencing financial or operating difficulties, securities where the issuer has defaulted in the payment of interest or principal or in the performance of its covenants or agreements, securities of issuers that may be involved in bankruptcy proceedings, reorganizations or financial restructurings or securities of issuers operating in troubled industries. The Fund seeks to hedge its non-dollar investments back to the U.S. dollar, but may not always be able to do so. In addition to direct investments in securities, 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. The Fund may use futures contracts, options, swaps and currency derivatives as tools in the management of portfolio assets. The Fund may use derivatives to hedge various investments, for risk management and/or to increase income or gain to the Fund. In particular, the Fund may invest in futures and swaps structured as interest rate swaps to manage duration relative to the benchmark. The Fund may also utilize foreign currency derivatives such as currency forwards, futures, and foreign exchange swaps to hedge its non-dollar investments back to the U.S. dollar. Although the Fund predominantly invests in corporate bonds, the Fund may also invest in U.S. Treasury securities including for cash management purposes and for duration management. The adviser buys and sells investments for the Fund using a three part process that includes determining: (1) macro credit strategy, (2) sector strategy, and (3) security strategy. In establishing the Fund’s macro credit strategy, the adviser evaluates fundamental, technical and valuation factors, along with macro themes from the adviser’s broader fixed income team, to determine the view on risk for the Fund overall. In the second component of the process, the adviser evaluates sectors based on a blend of top down analysis, including relative value judgments, and bottom up fundamental analysis of companies and their respective sectors to determine sector weightings. The third component of the process focuses on an evaluation of individual companies based on fundamental credit metrics, as well as a review of each company’s competitive environment, event risk and technical factors such as supply, liquidity of debt issued by the company and equity performance. As part of its security strategy, the adviser seeks to assess the impact of environmental, social and governance (ESG) factors on many issuers in the universe in which the Fund may invest. The adviser’s assessment is based on an analysis of key opportunities and risks across industries to seek to identify financially material issues with respect to the Fund’s investments in issuers and ascertain key issues that merit engagement with issuers. These assessments may not be conclusive and securities of issuers that may be negatively impacted by such factors may be purchased and retained by the Fund while the Fund may divest or not invest in securities of issuers that may be positively impacted by such factors. Based on the three part process, the adviser overweights and underweights its sector and security investments relative to the benchmark. As part of its principal investment strategy and for temporary defensive purposes, any portion of the Fund’s total assets may be invested in cash and cash equivalents.