JPMorgan Institutional Tax Free Money Market Fund Performance Management - Agency Shares [Member] - JPMorgan Institutional Tax Free 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 Agency Shares has varied from year to year for the past seven calendar years. The table shows the average annual total returns for the past one year, five years and life of the Fund.Effective September 3, 2024, the Fund adopted a non-fundamental investment policy to ordinarily invest, under normal circumstances, 100% of its total assets in weekly liquid assets (as defined under Rule 2a-7 of the Investment Company Act). Consequently, the performance information shown below may have been different had the non-fundamental investment policy been in effect. To obtain current yield information call 1-800-766-7722. Past performance is not necessarily an indication of how the Fund will perform in the future. |
| Performance Past Does Not Indicate Future [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Past </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">performance is not necessarily 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 </span><span style="font-family:Arial Narrow;font-size:10pt;">Fund’s Agency Shares has varied from year to year for the past seven calendar years. The table shows the average annual total returns for the past one year, five years and life of the Fund.</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 Quarter0.85%Worst Quarter4Q 20201Q 2021-0.01%The Fund’s year-to-date total returnthrough3/31/26was0.42%. |
| 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:7pt;font-weight:bold;margin-left:0.0pt;">(For periods ended December 31, 2025)</span> |
| Performance Availability Phone [Text] | <span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">1-800-766-7722</span> |
| Agency | |
| 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 | 0.85% |
| 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 | (0.01%) |
| Lowest Quarterly Return, Date | Mar. 31, 2022 |