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State Street SPDR Bloomberg 3-12 Month T-Bill ETF Annual Total Returns
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
State Street SPDR Bloomberg 3-12 Month T-Bill ETF | State Street SPDR Bloomberg 3-12 Month T-Bill ETF          
Prospectus [Line Items]          
Annual Return [Percent] 4.21% 5.20% 4.96% 0.85% (0.08%)