Investment Strategy - iShares Enhanced Large Cap Core Active ETF	Apr. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund is actively managed and seeks to pursue its investment objective while seeking to maintain a low tracking error to the Russell 1000 Index. The Fund invests in a portfolio of large cap equity securities in a disciplined manner, using proprietary return forecast models that incorporate quantitative analysis. These forecast models are designed to identify aspects of mispricing across stocks which the Fund can seek to capture by over- and under-weighting particular stocks, while seeking to control incremental risk. While the Fund primarily invests in securities included in the Russell 1000 Index, the Fund may also hold securities that are not included in the Russell 1000 Index. Under normal circumstances, the Fund seeks to invest at least 80% of its net assets plus the amount of any borrowings for investment purposes in large cap equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. For purposes of the Fund’s 80% policy, large cap equity securities are equity securities that at the time of purchase have a market capitalization within the range of companies included in the Russell 1000 Index. The Fund primarily intends to invest in equity securities, which include common stock and preferred stock or other financial instruments that are components of, or have characteristics similar to, the securities included in the Russell 1000 Index. The Russell 1000 Index is a capitalization-weighted index from a broad range of industries chosen for market size, liquidity and industry group representation. From time to time, the Fund may invest in shares of companies through “new issues” or initial public offerings (“IPOs”). The Fund may also purchase convertible securities. The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps, some of which may be referred to as contracts for difference) and forward contracts, both to seek to increase the return of the Fund and to hedge (or protect) the value of its assets against adverse movements in currency exchange rates, interest rates and movements in the securities markets. In order to manage cash flows into or out of the Fund effectively, the Fund may buy and sell financial futures contracts or options on such contracts. Derivatives are financial instruments whose value is derived from another security, a currency or an index, including but not limited to the Russell 1000 Index. The use of options, futures, swaps and forward contracts can be effective in protecting or enhancing the value of the Fund’s assets. The Fund is classified as non‑diversified under the Investment Company Act of 1940, as amended.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Fund primarily intends to invest in equity securities, which include common stock and preferred stock or other financial instruments that are components of, or have characteristics similar to, the securities included in the Russell 1000 Index. The Russell 1000 Index is a capitalization-weighted index from a broad range of industries chosen for market size, liquidity and industry group representation. From time to time, the Fund may invest in shares of companies through “new issues” or initial public offerings (“IPOs”). The Fund may also purchase convertible securities.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps, some of which may be referred to as contracts for difference) and forward contracts, both to seek to increase the return of the Fund and to hedge (or protect) the value of its assets against adverse movements in currency exchange rates, interest rates and movements in the securities markets. In order to manage cash flows into or out of the Fund effectively, the Fund may buy and sell financial futures contracts or options on such contracts. Derivatives are financial instruments whose value is derived from another security, a currency or an index, including but not limited to the Russell 1000 Index. The use of options, futures, swaps and forward contracts can be effective in protecting or enhancing the value of the Fund’s assets.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal circumstances, the Fund seeks to invest at least 80% of its net assets plus the amount of any borrowings for investment purposes in large cap equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. For purposes of the Fund’s 80% policy, large cap equity securities are equity securities that at the time of purchase have a market capitalization within the range of companies included in the Russell 1000 Index.

Investment Strategy - iShares Enhanced Large Cap Core Active ETF

Apr. 30, 2026

Principal Investment Strategies

The Fund is actively managed and seeks to pursue its investment objective while seeking to maintain a low tracking error to the Russell 1000 Index. The Fund invests in a portfolio of large cap equity securities in a disciplined manner, using proprietary return forecast models that incorporate quantitative analysis. These forecast models are designed to identify aspects of mispricing across stocks which the Fund can seek to capture by over- and under-weighting particular stocks, while seeking to control incremental risk. While the Fund primarily invests in securities included in the Russell 1000 Index, the Fund may also hold securities that are not included in the Russell 1000 Index.

Under normal circumstances, the Fund seeks to invest at least 80% of its net assets plus the amount of any borrowings for investment purposes in large cap equity securities and derivatives that provide investment exposure to such securities or to one or more market risk factors associated with such securities. For purposes of the Fund’s 80% policy, large cap equity securities are equity securities that at the time of purchase have a market capitalization within the range of companies included in the Russell 1000 Index. The Fund primarily intends to invest in equity securities, which include common stock and preferred stock or other financial instruments that are components of, or have characteristics similar to, the securities included in the Russell 1000 Index. The Russell 1000 Index is a capitalization-weighted index from a broad range of industries chosen for market size, liquidity and industry group representation. From time to time, the Fund may invest in shares of companies through “new issues” or initial public offerings (“IPOs”). The Fund may also purchase convertible securities.

The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps, some of which may be referred to as

contracts for difference) and forward contracts, both to seek to increase the return of the Fund and to hedge (or protect) the value of its assets against adverse movements in currency exchange rates, interest rates and movements in the securities markets. In order to manage cash flows into or out of the Fund effectively, the Fund may buy and sell financial futures contracts or options on such contracts. Derivatives are financial instruments whose value is derived from another security, a currency or an index, including but not limited to the Russell 1000 Index. The use of options, futures, swaps and forward contracts can be effective in protecting or enhancing the value of the Fund’s assets.

The Fund is classified as non‑diversified under the Investment Company Act of 1940, as amended.

Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]

The Fund primarily intends to invest in equity securities, which include common stock and preferred stock or other financial instruments that are components of, or have characteristics similar to, the securities included in the Russell 1000 Index. The Russell 1000 Index is a capitalization-weighted index from a broad range of industries chosen for market size, liquidity and industry group representation. From time to time, the Fund may invest in shares of companies through “new issues” or initial public offerings (“IPOs”). The Fund may also purchase convertible securities.

Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]

The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps, some of which may be referred to as

Rule 35d-1 Eighty Percent Investment Policy [Text Block]