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State Street SPDR US Small Cap Low Volatility Index ETF Average Annual Total Returns
 12 Months Ended 28 Months Ended 60 Months Ended 65 Months Ended 86 Months Ended 96 Months Ended 118 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
State Street US Small Cap Low Volatility Index/Russell 2000 Low Volatility Index (reflects no deduction for fees, expenses or taxes)[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [1] 5.84%   9.50%           9.54%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent 17.88% 21.76% 14.42% 16.50% 15.33% 14.27% 15.31% 15.77% 14.82%
State Street SPDR US Small Cap Low Volatility Index ETF                  
Prospectus [Line Items]                  
Average Annual Return, Percent 5.69%   9.36%           9.43%
State Street SPDR US Small Cap Low Volatility Index ETF | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent 4.85%   8.57%           8.31%
State Street SPDR US Small Cap Low Volatility Index ETF | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent 3.70%   7.20%           7.25%
[1] Returns shown are reflective of the Index for periods beginning on the Benchmark Index Change Date and the Previous Benchmark Index for periods prior to the Benchmark Index Change Date.