S000004337 [Member] Expense Example - iShares JPX-Nikkei 400 ETF - iShares JPX-Nikkei 400 ETF	Mar. 31, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 49
Expense Example, with Redemption, 3 Years	154
Expense Example, with Redemption, 5 Years	269
Expense Example, with Redemption, 10 Years	$ 604

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