S000069558 [Member] Expense Example - iShares 25+ Year Treasury STRIPS Bond ETF - iShares 25+ Year Treasury STRIPS Bond ETF	Feb. 28, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 10
Expense Example, with Redemption, 3 Years	32
Expense Example, with Redemption, 5 Years	65
Expense Example, with Redemption, 10 Years	$ 172

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