JPMorgan Institutional Tax Free Money Market Fund Investment Strategy - Agency Shares [Member] - JPMorgan Institutional Tax Free Money Market Fund	Feb. 28, 2026
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">The Fund’s Main Investment Strategy</span>
Strategy Narrative [Text Block]	Under normal conditions, the Fund invests primarily in municipal obligations, the interest on which is excluded from federal income taxes.As a fundamental policy, under normal circumstances, the Fund will invest at least 80% of the value of its Assets in municipal obligations. For purposes of this policy, “Assets” means net assets, plus the amount of borrowings for investment purposes. Municipal obligations include a broad range of short-term obligations issued by or on behalf of states, territories and possessions of the United States, the District of Columbia, and their respective authorities, agencies, instrumentalities, political subdivisions and other groups with authority to act for the municipalities and instruments that provide economic exposure to such obligations, including beneficial interests in municipal trust certificates and partnership trusts (“municipal obligations”). For purposes of the Fund’s 80% policy, the Fund may invest in municipal obligations by (1) purchasing instruments evidencing direct ownership of interest payments or principal payments, or both, on municipal obligations, such as tender option bonds, or (2) purchasing participation interests in all or part of specific holdings of municipal obligations. The Fund generally invests in short-term money market instruments such as private activity and industrial development bonds, tax anticipation notes, variable rate demand notes and participations in pools of municipal obligations. These investments may include privately placed securities. For purposes of the 80% policy above, the Fund will only invest in municipal obligations if the issuer receives assurances from legal counsel that the interest payable on the securities is exempt from federal income tax.As a non-fundamental policy, the Fund will ordinarily invest, under normal circumstances, 100% if its total assets in weekly liquid assets (as defined under Rule 2a-7 of the Investment Company Act of 1940 (the "Investment Company Act")). The maturity restrictions applicable to weekly liquid assets may reduce the Fund's yield and performance. Up to 20% of the Fund’s Assets may be invested in securities subject to federal income tax or the federal alternative minimum tax. The Fund is a money market fund managed in the following manner: ●The Fund calculates its net asset value to four decimals (e.g., $1.0000) using market-based pricing and operates with a floating net asset value. ●The dollar-weighted average maturity of the Fund will be 60 days or less and the dollar-weighted average life to maturity will be 120 days or less. ●The Fund will only buy securities that have remaining maturities of 397 days or less or securities otherwise permitted to be purchased because of maturity shortening provisions under applicable regulation. ●The Fund invests only in U.S. dollar-denominated securities. ●The Fund seeks to invest in securities that present minimal credit risk.The Fund may invest significantly in securities with floating or variable rates of interest. Their yields will vary as interest rates change. The Fund will at times hold some of its assets in cash. The Fund’s adviser seeks to develop an appropriate portfolio by considering the differences in yields among securities of different maturities, market sectors and issuers. Liquidity Fees The Fund’s policies and procedures require the Fund to impose a mandatory liquidity fee if the Fund experiences total daily net redemptions (based on flow information available within a reasonable period after the last computation of the Fund’s net asset value on that day) exceeding 5% of net assets, unless the amount of the mandatory liquidity fee would be de minimis. The size of the mandatory liquidity fee to be charged will be based on a good faith estimate, supported by data, of the costs the Fund would incur if it sold a pro rata amount of each security in its portfolio to satisfy the amount of the net redemptions. If these costs cannot be determined in good faith, a 1% default fee will be applied. If the amount of the mandatory liquidity fee would be de minimis (i.e., less than 0.01% of the value of the shares redeemed), the Fund is not required to charge a mandatory liquidity fee. In addition, the Fund’s policies and procedures permit the Fund to impose a discretionary liquidity fee on redemptions of up to 2% of the value of the shares redeemed if the adviser, as the delegate of the Board, determines it is in the best interests of the Fund.

JPMorgan Institutional Tax Free Money Market Fund Investment Strategy - Agency Shares [Member] - JPMorgan Institutional Tax Free Money Market Fund

Feb. 28, 2026

<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">The Fund’s Main Investment Strategy</span>

Strategy Narrative [Text Block]

Under normal conditions, the Fund invests primarily in municipal obligations, the interest on which is excluded from federal income taxes.As a fundamental policy, under normal circumstances, the Fund will invest at least 80% of the value of its Assets in municipal obligations. For purposes of this policy, “Assets” means net assets, plus the amount of borrowings for investment purposes. Municipal obligations include a broad range of short-term obligations issued by or on behalf of states, territories and possessions of the United States, the District of Columbia, and their respective authorities, agencies, instrumentalities, political subdivisions and other groups with authority to act for the municipalities and instruments that provide economic exposure to such obligations, including beneficial interests in municipal trust certificates and partnership trusts (“municipal obligations”). For purposes of the Fund’s 80% policy, the Fund may invest in municipal obligations by (1) purchasing instruments evidencing direct ownership of interest payments or principal payments, or both, on municipal obligations, such as tender option bonds, or (2) purchasing participation interests in all or part of specific holdings of municipal obligations. The Fund generally invests in short-term money market instruments such as private activity and industrial development bonds, tax anticipation notes, variable rate demand notes and participations in pools of municipal obligations. These investments may include privately placed securities. For purposes of the 80% policy above, the Fund will only invest in municipal obligations if the issuer receives assurances from legal counsel that the interest payable on the securities is exempt from federal income tax.As a non-fundamental policy, the Fund will ordinarily invest, under normal circumstances, 100% if its total assets in weekly liquid assets (as defined under Rule 2a-7 of the Investment Company Act of 1940 (the "Investment Company Act")). The maturity restrictions applicable to weekly liquid assets may reduce the Fund's yield and performance. Up to 20% of the Fund’s Assets may be invested in securities subject to federal income tax or the federal alternative minimum tax. The Fund is a money market fund managed in the following manner: ●The Fund calculates its net asset value to four decimals (e.g., $1.0000) using market-based pricing and operates with a floating net asset value. ●The dollar-weighted average maturity of the Fund will be 60 days or less and the dollar-weighted average life to maturity will be 120 days or less. ●The Fund will only buy securities that have remaining maturities of 397 days or less or securities otherwise permitted to be purchased because of maturity shortening provisions under applicable regulation. ●The Fund invests only in U.S. dollar-denominated securities. ●The Fund seeks to invest in securities that present minimal credit risk.The Fund may invest significantly in securities with floating or variable rates of interest. Their yields will vary as interest rates change. The Fund will at times hold some of its assets in cash. The Fund’s adviser seeks to develop an appropriate portfolio by considering the differences in yields among securities of different maturities, market sectors and issuers. Liquidity Fees The Fund’s policies and procedures require the Fund to impose a mandatory liquidity fee if the Fund experiences total daily net redemptions (based on flow information available within a reasonable period after the last computation of the Fund’s net asset value on that day) exceeding 5% of net assets, unless the amount of the mandatory liquidity fee would be de minimis. The size of the mandatory liquidity fee to be charged will be based on a good faith estimate, supported by data, of the costs the Fund would incur if it sold a pro rata amount of each security in its portfolio to satisfy the amount of the net redemptions. If these costs cannot be determined in good faith, a 1% default fee will be applied. If the amount of the mandatory liquidity fee would be de minimis (i.e., less than 0.01% of the value of the shares redeemed), the Fund is not required to charge a mandatory liquidity fee. In addition, the Fund’s policies and procedures permit the Fund to impose a discretionary liquidity fee on redemptions of up to 2% of the value of the shares redeemed if the adviser, as the delegate of the Board, determines it is in the best interests of the Fund.