JPMorgan California Tax Free Bond Fund Investment Strategy - R6 Shares [Member] - JPMorgan California Tax Free Bond Fund	Feb. 28, 2025
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]	As a fundamental policy, the Fund normally invests at least 80% of the value of its Assets in municipal securities, the income from which is exempt from federal and state personal income taxes for California residents and not subject to the federal alternative minimum tax on individuals. “Assets” means net assets, plus the amount of borrowings for investment purposes. The Fund seeks investments that also provide high current income. Municipal securities in which the Fund can invest include those issued by the State of California, its political subdivisions, as well as Puerto Rico, other U.S. territories and their political subdivisions. Because the Fund’s objective is high after-tax total return rather than high tax-exempt income, the Fund may invest to a limited extent in securities of other states or territories. To the extent that the Fund invests in municipal securities of other states, the income from such securities would be free from federal personal income taxes for California residents but would be subject to California taxes. For non-California residents, the income from California municipal securities may also be subject to state and local taxes in their jurisdiction of residence. Under normal circumstances, the Fund reserves the right to invest up to 20% of its Assets in securities that pay interest subject to federal income tax, the federal alternative minimum tax on individuals or California personal income taxes. To defend the value of its assets during unusual market conditions, the Fund may temporarily exceed this limit. The Fund’s securities may be of any maturity, but under normal circumstances the Fund’s duration will generally range between three and seven years. 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” 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). As of May 31, 2024 the duration of the Bloomberg California Municipal Bond Index was 6.01 years, although the duration will likely vary in the future. There may be times when there are not enough municipal securities available to meet the Fund’s needs. On these occasions, the Fund may invest in securities that may be subject to federal income tax. The Fund may invest in debt securities issued by governmental entities, certain issuers identified with the U.S. government and private issuers. The Fund may invest in municipal mortgage-backed and asset-backed securities. The Fund may invest a significant portion or all of its assets in municipal mortgage-backed securities at the adviser’s discretion. The Fund may invest up to 20% of its total assets in securities rated below investment grade. Such securities are known as “junk bonds,” “high yield bonds” and “non-investment grade bonds.” Junk bonds also include unrated securities that the adviser believes to be of comparable quality to debt securities that are rated below investment grade. These securities generally are rated in the fifth or lower rating categories (for example, BB+ or lower by S&P and Ba1 or lower by Moody’s). These securities generally offer a higher yield than investment grade securities, but involve a high degree of risk. A security’s quality is determined at the time of purchase and securities that are rated investment grade or the unrated equivalent may be downgraded or decline in credit quality, such that, following the time of purchase, they would be deemed to be below investment grade. If the quality of an investment grade security is downgraded subsequent to purchase to below investment grade, the Fund may continue to hold the security. The Fund may also invest in high-quality, short-term money market instruments and repurchase agreements. The Fund may also invest in zero-coupon securities. Investment Process: 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 and the complex legal and technical structure of the transaction. As part of its investment 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 municipal issues and ascertain key issues that merit engagement with municipal issuers. These assessments may not be conclusive and securities 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 that may be positively impacted by such factors.

JPMorgan California Tax Free Bond Fund Investment Strategy - R6 Shares [Member] - JPMorgan California Tax Free Bond Fund

Feb. 28, 2025

<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]

As a fundamental policy, the Fund normally invests at least 80% of the value of its Assets in municipal securities, the income from which is exempt from federal and state personal income taxes for California residents and not subject to the federal alternative minimum tax on individuals. “Assets” means net assets, plus the amount of borrowings for investment purposes. The Fund seeks investments that also provide high current income. Municipal securities in which the Fund can invest include those issued by the State of California, its political subdivisions, as well as Puerto Rico, other U.S. territories and their political subdivisions. Because the Fund’s objective is high after-tax total return rather than high tax-exempt income, the Fund may invest to a limited extent in securities of other states or territories. To the extent that the Fund invests in municipal securities of other states, the income from such securities would be free from federal personal income taxes for California residents but would be subject to California taxes. For non-California residents, the income from California municipal securities may also be subject to state and local taxes in their jurisdiction of residence. Under normal circumstances, the Fund reserves the right to invest up to 20% of its Assets in securities that pay interest subject to federal income tax, the federal alternative minimum tax on individuals or California personal income taxes. To defend the value of its assets during unusual market conditions, the Fund may temporarily exceed this limit. The Fund’s securities may be of any maturity, but under normal circumstances the Fund’s duration will generally range between three and seven years. 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” 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). As of May 31, 2024 the duration of the Bloomberg California Municipal Bond Index was 6.01 years, although the duration will likely vary in the future. There may be times when there are not enough municipal securities available to meet the Fund’s needs. On these occasions, the Fund may invest in securities that may be subject to federal income tax. The Fund may invest in debt securities issued by governmental entities, certain issuers identified with the U.S. government and private issuers. The Fund may invest in municipal mortgage-backed and asset-backed securities. The Fund may invest a significant portion or all of its assets in municipal mortgage-backed securities at the adviser’s discretion. The Fund may invest up to 20% of its total assets in securities rated below investment grade. Such securities are known as “junk bonds,” “high yield bonds” and “non-investment grade bonds.” Junk bonds also include unrated securities that the adviser believes to be of comparable quality to debt securities that are rated below investment grade. These securities generally are rated in the fifth or lower rating categories (for example, BB+ or lower by S&P and Ba1 or lower by Moody’s). These securities generally offer a higher yield than investment grade securities, but involve a high degree of risk. A security’s quality is determined at the time of purchase and securities that are rated investment grade or the unrated equivalent may be downgraded or decline in credit quality, such that, following the time of purchase, they would be deemed to be below investment grade. If the quality of an investment grade security is downgraded subsequent to purchase to below investment grade, the Fund may continue to hold the security. The Fund may also invest in high-quality, short-term money market instruments and repurchase agreements. The Fund may also invest in zero-coupon securities. Investment Process: 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 and the complex legal and technical structure of the transaction. As part of its investment 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 municipal issues and ascertain key issues that merit engagement with municipal issuers. These assessments may not be conclusive and securities 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 that may be positively impacted by such factors.