Sustainable Municipal Income ETF Performance Management - Sustainable Municipal Income ETF |
Feb. 28, 2026 |
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| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">The Fund’s Past Performance</span> |
| Performance Narrative [Text Block] | This section provides some indication of the risks of investing in the Fund. The Fund commenced operations after the assets of another investment company advised by the adviser, JPMorgan Sustainable Municipal Income Fund (the predecessor fund), were transferred to the Fund in a tax-free reorganization as of the close of business on July 14, 2023. All share classes of the predecessor fund were converted into the Fund. The Fund has the same investment objective and substantially similar investment strategies as those of the predecessor fund. The bar chart shows how the performance of the Fund’s Shares (represented by the performance of the predecessor fund’s Class R6 Shares) has varied from year to year for the past ten calendar years. The table shows the Fund’s average annual total returns (represented by the average annual total returns of the predecessor fund’s Class R6 Shares) for the past one year, five years and ten years. The table compares the Fund’s performance (represented by the performance of the predecessor fund’s Class R6 Shares) to the performance of the Bloomberg US Municipal Index and Bloomberg US 1-15 Year Blend (1-17) Municipal Bond Index. The performance of the Class R6 Shares of the predecessor fund prior to their inception are based on Class I Shares. The actual returns of the predecessor fund’s Class R6 Shares would be substantially similar to the performance of Class I Shares because the predecessor fund is invested in the same group of securities and the annual returns would differ only to the extent that the classes do not have the same expenses. Performance for the Fund’s Shares has not been adjusted to reflect the Fund’s Shares’ lower expenses than those of the predecessor fund’s Class R6 Shares. Performance for the predecessor fund is based on the NAV per share of the predecessor fund shares rather than on market-determined prices. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-844-457-6383 (844-4JPM ETF).Source: Bloomberg Index Services Limited. BLOOMBERG® is a trademark and service mark of Bloomberg Finance L.P. and its affiliates (collectively “Bloomberg”). Bloomberg or Bloomberg’s licensors own all proprietary rights in the Bloomberg Indices. Bloomberg does not approve or endorse this material, or guarantee the accuracy or completeness of any information herein, or make any warranty, express or implied, as to the results to be obtained therefrom and, to the maximum extent allowed by law, shall not have any liability or responsibility for injury or damages arising in connection therewith. |
| Performance Past Does Not Indicate Future [Text] | <span style="font-family:Arial Narrow;font-size:10pt;">Past performance (before and after taxes) is not necessarily</span><span style="font-family:Arial Narrow;font-size:10pt;"> an indication of how the Fund will perform in the future.</span> |
| Performance Information Illustrates Variability of Returns [Text] | <span style="font-family:Arial Narrow;font-size:10pt;">The bar chart shows how the performance of the Fund’s Shares (represented by the performance of the predecessor fund’s Class R6 Shares) has varied from year to year for the past ten calendar years. The table shows the Fund’s average annual total returns (represented by the average annual total returns of the predecessor fund’s Class R6 Shares) for the past one year, five years and ten years.</span> |
| Bar Chart [Heading] | <span style="color:#FFFFFF;font-family:Arial Narrow;font-size:10pt;font-weight:bold;margin-left:0.0pt;">YEAR-BY-YEAR RETURNS</span> |
| Bar Chart Closing [Text Block] | Best Quarter4th quarter, 20236.35%Worst Quarter1st quarter, 2022-5.74%The Fund’s year-to-date total returnthrough3/31/26was-0.42%. |
| Performance Table Heading | <span style="color:#FFFFFF;font-family:Arial Narrow;font-size:11pt;font-weight:bold;margin-left:0.0pt;">AVERAGE ANNUAL TOTAL RETURNS</span><span style="color:#FFFFFF;font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">(For periods ended December 31, 2025)</span> |
| Performance Table Narrative | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. |
| Performance Table Uses Highest Federal Rate | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. </span> |
| Performance Table Not Relevant to Tax Deferred | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Actual after-tax returns </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.</span> |
| Performance Availability Website Address [Text] | <span style="font-family:Arial Narrow;font-size:10pt;font-style:italic;">www.jpmorganfunds.com</span> |
| Performance Availability Phone [Text] | <span style="font-family:Arial Narrow;font-size:10pt;font-style:italic;">1-844-457-6383 (844-4JPM</span><span style="font-family:Arial Narrow;font-size:10pt;font-style:italic;"> ETF)</span> |
| ETF | |
| Prospectus [Line Items] | |
| Year to Date Return, Label [Optional Text] | <span style="font-family:Arial Narrow;font-size:9pt;margin-left:0.0pt;">The Fund’s year-to-date total return</span> |
| Bar Chart, Year to Date Return | (0.42%) |
| Bar Chart, Year to Date Return, Date | Mar. 31, 2026 |
| Highest Quarterly Return, Label [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Best Quarter</span> |
| Highest Quarterly Return | 6.35% |
| Highest Quarterly Return, Date | Dec. 31, 2023 |
| Lowest Quarterly Return, Label [Optional Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Worst Quarter</span> |
| Lowest Quarterly Return | (5.74%) |
| Lowest Quarterly Return, Date | Mar. 31, 2022 |