JPMorgan U.S. Government Money Market Fund Performance Management - Digital Shares [Member] - JPMorgan U.S. Government Money Market Fund |
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 bar chart shows how the performance of the Fund’s Capital Shares (which are not offered in this prospectus) has varied from year to year for the past ten calendar years.The table shows the average annual total returns over the past one year, five years and ten years. Returns for Digital Shares would be similar to the returns shown because the Shares are invested in the same portfolio of securities and the returns would differ only to the extent that the classes do not have the same expenses. To obtain current yield information call 1-800-766-7722. Past performance (before and after taxes) is not necessarily an indication of how any class of the Fund will perform in the future. Updated performance information is available by visiting www.jpmorganfunds.com or by calling 1-800-766-7722. |
| Performance Past Does Not Indicate Future [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Past performance (before and after taxes) is </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">not necessarily an indication of how any class of the Fund will perform in the future. </span> |
| Performance Information Illustrates Variability of Returns [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">The bar chart shows how the performance of the </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Fund’s Capital Shares (which are not offered in this prospectus) has varied from year to year for the past ten calendar years.</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">The table shows the average annual total returns over the past one year, five years and ten years. </span> |
| Bar Chart, Returns for Class Not Offered in Prospectus [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">The bar chart shows how the performance of the </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Fund’s Capital Shares (which are not offered in this prospectus) has varied from year to year for the past ten calendar 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 Quarter1.32%Worst Quarter3Q and 4Q 20201Q, 2Q, 3Q and0.01%The Fund’s year-to-date total returnthrough3/31/26was0.88%. |
| 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 Availability Website Address [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">www.jpmorganfunds.com</span> |
| Performance Availability Phone [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">1-800-766-7722</span> |
| Capital | |
| 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 | 0.88% |
| Bar Chart, Year to Date Return, Date | Mar. 31, 2026 |
| Highest Quarterly Return, Label [Optional Text] | <span style="font-family:Arial Narrow;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Best Quarter</span> |
| Highest Quarterly Return | 1.32% |
| Highest Quarterly Return, Date | Dec. 31, 2023 |
| Lowest Quarterly Return, Label [Optional Text] | <span style="font-family:Arial Narrow;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Worst Quarter</span> |
| Lowest Quarterly Return | 0.01% |
| Lowest Quarterly Return, Date | Dec. 31, 2021 |