State Street SPDR Portfolio Ultra Short T-Bill Index ETF Investment Objectives and Goals - State Street SPDR Portfolio Ultra Short T-Bill Index ETF	Jun. 30, 2026
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 Ultra Short T-Bill 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 Ultra Short T-Bill 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 Ultra Short T-Bill 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 1–12 month sector of the United States Treasury Bill market.

State Street SPDR Portfolio Ultra Short T-Bill Index ETF Investment Objectives and Goals - State Street SPDR Portfolio Ultra Short T-Bill Index ETF

Jun. 30, 2026

State Street® SPDR® Portfolio Ultra Short T-Bill Index ETF(formerly, State Street® SPDR® Portfolio Ultra Short T-Bill ETF)

Objective [Heading]

Investment Objective

Objective, Primary [Text Block]

The State Street SPDR Portfolio Ultra Short T-Bill 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 1–12 month sector of the United States Treasury Bill market.