S000026553 [Member] Expense Example - iShares Russell Top 200 ETF - iShares Russell Top 200 ETF	Mar. 31, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 15
Expense Example, with Redemption, 3 Years	48
Expense Example, with Redemption, 5 Years	85
Expense Example, with Redemption, 10 Years	$ 192

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