JPMorgan Government Bond Fund Investment Strategy - A C I Shares [Member] - JPMorgan Government 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 principally invests in securities issued by the U.S. government and its agencies and instrumentalities and related to securities issued by the U.S. government and its agencies and instrumentalities. The Fund may also invest in securities which are guaranteed by the U.S. government and its agencies and instrumentalities so long as such securities are backed by the full faith and credit of the United States.The Fund mainly invests in government bonds with intermediate to long remaining maturities. These include U.S. mortgage-backed securities, including those issued or guaranteed by the Government National Mortgage Association (Ginnie Mae), the Federal National Mortgage Association (Fannie Mae) or the Federal Home Loan Mortgage Corporation (Freddie Mac). Mortgage-backed securities may be structured as collateralized mortgage obligations (agency and non-agency), mortgage pass-though securities, and stripped mortgage-backed securities. These securities may be structured such that payments consist of interest-only (IO), principal-only (PO) or principal and interest. The Fund may invest a significant portion or all of its assets in mortgage-backed securities in the adviser’s discretion. Under normal circumstances, the Fund will invest at least 80% of its Assets in government bonds including bonds issued or guaranteed by the U.S. government and its agencies and instrumentalities. For purposes of this policy, “Assets” means net assets plus the amount of borrowings for investment purposes. Ordinarily, such bonds will have principal and interest guaranteed by the U.S. government or its agencies and instrumentalities, be subject to repurchase agreements, or represent an interest in or be secured by mortgages that are issued or guaranteed by certain U.S. government agencies or instrumentalities. The Fund’s average weighted maturity will ordinarily range between three and 15 years, taking into account expected prepayment of principal on certain investments. 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 mortgage-backed and similar securities, the Fund’s average weighted maturity is equivalent to the average number of years for which each dollar of unpaid principal on a loan or mortgage securing mortgage-backed and similar securities remains outstanding given certain prepayment assumptions (also known as weighted average life). The Fund’s adviser has flexibility with respect to the Fund’s duration. Currently, the Fund’s adviser aims to maintain a duration of between 5.00 and 5.50 years over the long term, although the adviser has the flexibility to maintain a longer or shorter duration when it believes it is advisable to do so. Duration is a measure of the price sensitivity of a debt security or a portfolio of debt securities to relative changes in interest rates. For instance, a duration of three years means that a security’s or portfolio’s price would be expected to decrease by approximately 3% with a 1% increase in interest rates (assuming a parallel shift in yield curve). 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 evaluation of credit risk, 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 Government Bond Fund Investment Strategy - A C I Shares [Member] - JPMorgan Government 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 principally invests in securities issued by the U.S. government and its agencies and instrumentalities and related to securities issued by the U.S. government and its agencies and instrumentalities. The Fund may also invest in securities which are guaranteed by the U.S. government and its agencies and instrumentalities so long as such securities are backed by the full faith and credit of the United States.The Fund mainly invests in government bonds with intermediate to long remaining maturities. These include U.S. mortgage-backed securities, including those issued or guaranteed by the Government National Mortgage Association (Ginnie Mae), the Federal National Mortgage Association (Fannie Mae) or the Federal Home Loan Mortgage Corporation (Freddie Mac). Mortgage-backed securities may be structured as collateralized mortgage obligations (agency and non-agency), mortgage pass-though securities, and stripped mortgage-backed securities. These securities may be structured such that payments consist of interest-only (IO), principal-only (PO) or principal and interest. The Fund may invest a significant portion or all of its assets in mortgage-backed securities in the adviser’s discretion. Under normal circumstances, the Fund will invest at least 80% of its Assets in government bonds including bonds issued or guaranteed by the U.S. government and its agencies and instrumentalities. For purposes of this policy, “Assets” means net assets plus the amount of borrowings for investment purposes. Ordinarily, such bonds will have principal and interest guaranteed by the U.S. government or its agencies and instrumentalities, be subject to repurchase agreements, or represent an interest in or be secured by mortgages that are issued or guaranteed by certain U.S. government agencies or instrumentalities. The Fund’s average weighted maturity will ordinarily range between three and 15 years, taking into account expected prepayment of principal on certain investments. 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 mortgage-backed and similar securities, the Fund’s average weighted maturity is equivalent to the average number of years for which each dollar of unpaid principal on a loan or mortgage securing mortgage-backed and similar securities remains outstanding given certain prepayment assumptions (also known as weighted average life). The Fund’s adviser has flexibility with respect to the Fund’s duration. Currently, the Fund’s adviser aims to maintain a duration of between 5.00 and 5.50 years over the long term, although the adviser has the flexibility to maintain a longer or shorter duration when it believes it is advisable to do so. Duration is a measure of the price sensitivity of a debt security or a portfolio of debt securities to relative changes in interest rates. For instance, a duration of three years means that a security’s or portfolio’s price would be expected to decrease by approximately 3% with a 1% increase in interest rates (assuming a parallel shift in yield curve). 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 evaluation of credit risk, 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.