JPMorgan Core Bond Fund Investment Strategy - A C I Shares [Member] - JPMorgan Core 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 is designed to maximize total return by investing in a portfolio of investment grade intermediate- and long-term debt securities. As part of its main investment strategy, the Fund may principally invest in corporate bonds, U.S. treasury obligations including treasury coupon strips and treasury principal strips, and other U.S. government and agency securities, and asset-backed, mortgage-related and mortgage-backed securities. Mortgage-related and mortgage-backed securities may be structured as collateralized mortgage obligations (agency and non-agency), stripped mortgage-backed securities, commercial mortgage-backed securities, mortgage pass-through securities and cash and cash equivalents. These securities may be structured such that payments consist of interest-only (IO), principal-only (PO) or principal and interest. As a matter of fundamental policy, the Fund will invest at least 80% of its Assets in bonds. In addition, under normal circumstances, the Fund will invest at least 80% of its Assets in “core bonds,” defined as U.S. dollar-denominated, taxable, investment grade (or the unrated equivalent) bonds. The "unrated equivalent" refers to securities that are unrated but deemed by the adviser to be of comparable quality. For purposes of these policies, a “bond” is a debt security with a maturity of 90 days or more at the time of its issuance. “Assets” means net assets plus the amount of borrowings for investment purposes. Generally, such bonds will have intermediate to long maturities. The Fund’s average weighted maturity will ordinarily range between four and 12 years. The Fund may have a longer or shorter average weighted maturity under certain market conditions and the Fund may shorten or lengthen its average weighted maturity if deemed appropriate for temporary defensive purposes. Because of the Fund’s holdings in asset-backed, mortgage-backed and similar securities, the Fund’s average weighted maturity is equivalent to the average weighted maturity of the cash flows in the securities held by the Fund given certain prepayment assumptions (also known as weighted average life). Securities will be rated investment grade (or the unrated equivalent) at the time of purchase. In addition, all securities will be U.S. dollar-denominated although they may be issued by a foreign corporation or a U.S. affiliate of a foreign corporation or a foreign government or its agencies and instrumentalities. The adviser may invest a significant portion or all of its assets in mortgage-related and mortgage-backed securities in the adviser’s discretion. The Fund expects to invest no more than 10% of its assets in “sub-prime” mortgage-related securities at the time of purchase. The adviser buys and sells securities and investments for the Fund based on its view of individual securities and market sectors. Taking a long-term approach, the adviser looks for individual fixed income investments that it believes will perform well over market cycles. The adviser is value oriented and makes decisions to purchase and sell individual securities and instruments after performing a risk/reward analysis that includes an evaluation of interest rate risk, credit risk, duration, liquidity, legal provisions and the structure of the transaction. As part of its security selection process, the adviser seeks to assess the impact of environmental, social and governance (ESG) factors on certain 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. The Fund may enter into lending agreements under which the Fund would lend money for temporary purposes directly to another J.P. Morgan Fund through a credit facility, subject to meeting the conditions of an SEC exemptive order granted to the Fund permitting such interfund lending.

JPMorgan Core Bond Fund Investment Strategy - A C I Shares [Member] - JPMorgan Core 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 is designed to maximize total return by investing in a portfolio of investment grade intermediate- and long-term debt securities. As part of its main investment strategy, the Fund may principally invest in corporate bonds, U.S. treasury obligations including treasury coupon strips and treasury principal strips, and other U.S. government and agency securities, and asset-backed, mortgage-related and mortgage-backed securities. Mortgage-related and mortgage-backed securities may be structured as collateralized mortgage obligations (agency and non-agency), stripped mortgage-backed securities, commercial mortgage-backed securities, mortgage pass-through securities and cash and cash equivalents. These securities may be structured such that payments consist of interest-only (IO), principal-only (PO) or principal and interest. As a matter of fundamental policy, the Fund will invest at least 80% of its Assets in bonds. In addition, under normal circumstances, the Fund will invest at least 80% of its Assets in “core bonds,” defined as U.S. dollar-denominated, taxable, investment grade (or the unrated equivalent) bonds. The "unrated equivalent" refers to securities that are unrated but deemed by the adviser to be of comparable quality. For purposes of these policies, a “bond” is a debt security with a maturity of 90 days or more at the time of its issuance. “Assets” means net assets plus the amount of borrowings for investment purposes. Generally, such bonds will have intermediate to long maturities. The Fund’s average weighted maturity will ordinarily range between four and 12 years. The Fund may have a longer or shorter average weighted maturity under certain market conditions and the Fund may shorten or lengthen its average weighted maturity if deemed appropriate for temporary defensive purposes. Because of the Fund’s holdings in asset-backed, mortgage-backed and similar securities, the Fund’s average weighted maturity is equivalent to the average weighted maturity of the cash flows in the securities held by the Fund given certain prepayment assumptions (also known as weighted average life). Securities will be rated investment grade (or the unrated equivalent) at the time of purchase. In addition, all securities will be U.S. dollar-denominated although they may be issued by a foreign corporation or a U.S. affiliate of a foreign corporation or a foreign government or its agencies and instrumentalities. The adviser may invest a significant portion or all of its assets in mortgage-related and mortgage-backed securities in the adviser’s discretion. The Fund expects to invest no more than 10% of its assets in “sub-prime” mortgage-related securities at the time of purchase. The adviser buys and sells securities and investments for the Fund based on its view of individual securities and market sectors. Taking a long-term approach, the adviser looks for individual fixed income investments that it believes will perform well over market cycles. The adviser is value oriented and makes decisions to purchase and sell individual securities and instruments after performing a risk/reward analysis that includes an evaluation of interest rate risk, credit risk, duration, liquidity, legal provisions and the structure of the transaction. As part of its security selection process, the adviser seeks to assess the impact of environmental, social and governance (ESG) factors on certain 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. The Fund may enter into lending agreements under which the Fund would lend money for temporary purposes directly to another J.P. Morgan Fund through a credit facility, subject to meeting the conditions of an SEC exemptive order granted to the Fund permitting such interfund lending.