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State Street Blackstone High Income ETF Average Annual Total Returns
 12 Months Ended 46 Months Ended 51 Months Ended 59 Months Ended 60 Months Ended 81 Months Ended 117 Months Ended 120 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   7.30% 1.01% (0.12%) (0.17%) (0.36%) 1.67% 1.72% 2.01%
State Street Blackstone High Income Composite Index (reflects no deduction for fees, expenses or taxes)[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [1]   7.20% 6.30%            
State Street Blackstone High Income ETF                  
Prospectus [Line Items]                  
Average Annual Return, Percent   7.84% 6.04%            
Performance Inception Date Feb. 17, 2022                
State Street Blackstone High Income ETF | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   4.71% 2.94%            
State Street Blackstone High Income ETF | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   4.57% 3.23%            
[1] A composite benchmark the Fund seeks to outperform, comprising 50% high yield bonds and 50% senior loans.