S000004336 [Member] Expense Example - iShares Russell Mid-Cap Growth ETF - iShares Russell Mid-Cap Growth ETF	Mar. 31, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 24
Expense Example, with Redemption, 3 Years	74
Expense Example, with Redemption, 5 Years	130
Expense Example, with Redemption, 10 Years	$ 293

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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