State Street SPDR Portfolio Treasury Index ETF Investment Objectives and Goals - State Street SPDR Portfolio Treasury Index ETF |
Jun. 30, 2026 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | <span style="color:#000000;font-family:Arial;font-size:18pt;font-weight:bold;">State Street</span><span style="color:#000000;font-family:Arial;font-size:11.5pt;font-weight:bold;position:relative;top:-5pt;">®</span><span style="color:#000000;font-family:Arial;font-size:18pt;font-weight:bold;"> SPDR</span><span style="color:#000000;font-family:Arial;font-size:11.5pt;font-weight:bold;position:relative;top:-5pt;">®</span><span style="color:#000000;font-family:Arial;font-size:18pt;font-weight:bold;"> Portfolio Treasury Index ETF</span><span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">(formerly, State Street</span><span style="color:#000000;font-family:Arial;font-size:6.5pt;font-weight:bold;position:relative;top:-2.75pt;">®</span><span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"> SPDR</span><span style="color:#000000;font-family:Arial;font-size:6.5pt;font-weight:bold;position:relative;top:-2.75pt;">®</span><span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;"> Portfolio Treasury ETF)</span> |
| Objective [Heading] | <span style="color:#000000;font-family:Arial;font-size:10.5pt;font-weight:bold;margin-left:10.5pt;text-transform:uppercase;">Investment Objective</span> |
| Objective, Primary [Text Block] | The State Street SPDR Portfolio Treasury Index ETF (the “Fund”) seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of an index that tracks the United States Treasury market. |