S000004333 [Member] Expense Example - iShares U.S. Telecommunications ETF - iShares U.S. Telecommunications ETF	Mar. 31, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 38
Expense Example, with Redemption, 3 Years	119
Expense Example, with Redemption, 5 Years	208
Expense Example, with Redemption, 10 Years	$ 468

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