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S000004359 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended 290 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P Global Broad Market Index (Net) (Returns do not reflect deductions for fees, expenses or taxes except for withholding taxes on reinvested dividends)        
Prospectus [Line Items]        
Average Annual Return, Percent [1] 21.96% 10.50% 11.28%  
S&P Global 1200 Energy 4.5/22.5/45 Capped Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes except for withholding taxes on reinvested dividends)        
Prospectus [Line Items]        
Average Annual Return, Percent [1],[2] 13.68% 19.81% 8.12%  
iShares Global Energy ETF        
Prospectus [Line Items]        
Average Annual Return, Percent 13.96% 20.32% 8.51%  
Performance Inception Date       Nov. 12, 2001
iShares Global Energy ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 12.95% 19.18% 7.44%  
iShares Global Energy ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 8.93% 16.46% 6.65%  
[1] Returns for net indices generally assume the reinvestment of dividends after the deduction of the maximum withholding tax in each country applicable to non-residents of the country as determined by the index provider. Such indices use withholding tax rates that are often at a higher rate than the rates to which the Fund is subject in each country, including for countries where the Fund is not subject to withholding taxes. When this is the case, index performance will be lower than if the index used the Fund's applicable withholding tax rates, if any.
[2] The S&P Global 1200 Energy 4.5/22.5/45 Capped Index (Spliced) reflects the performance of the S&P Global 1200 Energy Index (Net) through April 19, 2023 and the S&P Global 1200 Energy 4.5/22.5/45 Capped Index (Net) thereafter, which reflect the times when each index was the Underlying Index of the Fund.