State Street Federal Treasury Plus Money Market Fund Performance Management - State Street Federal Treasury Plus Money Market Fund |
Sep. 04, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | <span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;">Fund Performance</span> |
| Performance Narrative [Text Block] | The Fund has not yet completed a full calendar year of operations and therefore does not have performance history.Once the Fund has completed a full calendar year of operations, a bar chart and table will be included that will provide some indication of the risks of investing in the Fund by showing the variability of the Fund's returns based on net assets. When available, the Fund will make updated performance information available at the Fund's website: www.statestreet.com/im. |
| Performance One Year or Less [Text] | <span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;">The Fund has not yet completed a full calendar year of operations and therefore does not have performance history.</span> |
| Performance Availability Website Address [Text] | <span style="color:#000000;font-family:Arial;font-size:10.02pt;">www.statestreet.com/im</span> |