| Label | Element | Value |
|---|---|---|
| Risk/Return: | rr_RiskReturnAbstract | |
| Document Type | dei_DocumentType | 497 |
| Document Period End Date | dei_DocumentPeriodEndDate | Aug. 31, 2020 |
| Registrant Name | dei_EntityRegistrantName | iShares, Inc. |
| Entity Central Index Key | dei_EntityCentralIndexKey | 0000930667 |
| Amendment Flag | dei_AmendmentFlag | false |
| Document Creation Date | dei_DocumentCreationDate | May 03, 2021 |
| Document Effective Date | dei_DocumentEffectiveDate | May 03, 2021 |
| Prospectus Date | rr_ProspectusDate | May 03, 2021 |
| Entity Inv Company Type | dei_EntityInvCompanyType | N-1A |
May 03, 2021 |
|---|
iShares ® iShares, Inc. iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised January 28, 2021): iShares Currency Hedged JPX-Nikkei 400 ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Asia 50 ETF iShares Global 100 ETF iShares Global Comm Services ETF iShares Global Consumer Discretionary ETF iShares Global Healthcare ETF iShares Global Materials ETF iShares Global Tech ETF iShares Global Timber & Forestry ETF iShares India 50 ETF iShares Latin America 40 ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised October 30, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Emerging Markets Infrastructure ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised December 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares International Dividend Growth ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Europe ETF iShares Global Consumer Staples ETF iShares Global Energy ETF iShares Global Financials ETF iShares Global Industrials ETF iShares Global Infrastructure ETF iShares International Developed Property ETF iShares International Preferred Stock ETF iShares JPX-Nikkei 400 ETF iShares North American Natural Resources ETF Supplement to the Summary Prospectus, Prospectus and Statement of Additional Information all dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Clean Energy ETF Supplement to the Summary Prospectus, Prospectus and Statement of Additional Information all dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Utilities ETF Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of September 1, 2020 (as revised September 30, 2020): iShares Asia/Pacific Dividend ETF Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020 (as revised November 23, 2020), and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares Emerging Markets Dividend ETF Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020, and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares Global REIT ETF Supplement to the Summary Prospectus dated as of September 1, 2020 and Prospectus dated as of September 1, 2020 (as revised December 7, 2020), and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares International Select Dividend ETF Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020, and to the Statement of Additional Information dated as of September 1, 2020 (as April 19, 2021): iShares International Developed Real Estate ETF Supplement to the Summary Prospectus dated as of September 30, 2020, and to the Prospectus dated as of September 22, 2020, and to the Statement of Additional Information dated as of September 22, 2020 (as revised January 14, 2021): iShares Virtual Work and Life Multisector ETF Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of December 1, 2020: iShares Core MSCI Europe ETF iShares Core MSCI Pacific ETF iShares MSCI Kokusai ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares China Large-Cap ETF iShares MSCI EAFE ETF iShares MSCI EAFE Growth ETF iShares MSCI EAFE Min Vol Factor ETF iShares MSCI EAFE Small -CapiShares MSCI EAFE Value ETF iShares MSCI Europe Financials ETF iShares MSCI Europe Small -CapiShares MSCI Intl Momentum Factor ETF iShares MSCI Intl Multifactor ETF iShares MSCI Intl Quality Factor ETF iShares MSCI Intl Size Factor ETF iShares MSCI Intl Small-Cap Multifactor ETF iShares MSCI Intl Value Factor ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Core MSCI EAFE ETF iShares Core MSCI International Developed Markets ETF iShares Core MSCI Total International Stock ETF iShares Cybersecurity and Tech ETF iShares Exponential Technologies ETF iShares Genomics Immunology and Healthcare ETF iShares MSCI ACWI ETF iShares MSCI ACWI ex U.S. ETF iShares MSCI ACWI Low Carbon Target ETF iShares MSCI All Country Asia ex Japan ETF iShares MSCI China A ETF iShares MSCI Global Multifactor ETF iShares Robotics and Artificial Intelligence Multisector ETF iShares Self-Driving EV and Tech ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 28, 2021): iShares Adaptive Currency Hedged MSCI EAFE ETF iShares Currency Hedged MSCI ACWI ex U.S. ETF iShares Currency Hedged MSCI EAFE ETF iShares Currency Hedged MSCI EAFE Small-Cap ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares ESG Advanced MSCI EAFE ETF iShares ESG Aware MSCI EAFE ETF iShares MSCI Denmark ETF iShares MSCI Finland ETF iShares MSCI Germany Small-Cap ETF iShares MSCI Indonesia ETF iShares MSCI Ireland ETF iShares MSCI Japan Equal Weighted ETF iShares MSCI Japan Value ETF iShares MSCI New Zealand ETF iShares MSCI Norway ETF iShares MSCI Poland ETF iShares MSCI United Kingdom ETF iShares MSCI United Kingdom Small-Cap ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Australia ETF iShares MSCI Austria ETF iShares MSCI Belgium ETF iShares MSCI Canada ETF iShares MSCI Eurozone ETF iShares MSCI France ETF iShares MSCI Germany ETF iShares MSCI Israel ETF iShares MSCI Italy ETF iShares MSCI Japan ETF iShares MSCI Japan Small-Cap ETF iShares MSCI Mexico ETF iShares MSCI Netherlands ETF iShares MSCI Pacific ex Japan ETF iShares MSCI Russia ETF iShares MSCI Singapore ETF iShares MSCI South Africa ETF iShares MSCI Spain ETF iShares MSCI Sweden ETF iShares MSCI Switzerland ETF iShares MSCI Thailand ETF iShares MSCI Turkey ETF iShares MSCI World ETF Supplement to the Summary Prospectus dated as of December 30, 2020, and Prosp ectus dated as of December 30, 2020 (as revised January 7, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Philippines ETF Supplement to the Summary Prospectus dated as of December 30, 2020, and Prospectus dated as of December 30, 2020 (as revised January 7, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Hong Kong ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares ESG Advanced MSCI EM ETF iShares ESG MSCI EM Leaders ETF iShares MSCI Argentina and Global Exposure ETF iShares MSCI Brazil Small-Cap ETF iShares MSCI China ETF iShares MSCI China Small-Cap ETF iShares MSCI Emerging Markets ex China ETF iShares MSCI Global Impact ETF iShares MSCI India ETF iShares MSCI India Small-Cap ETF iShares MSCI Kuwait ETF iShares MSCI Peru ETF iShares MSCI Qatar ETF iShares MSCI Saudi Arabia ETF iShares MSCI UAE ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Canada ETF iShares Currency Hedged MSCI Emerging Markets ETF iShares Currency Hedged MSCI Eurozone ETF iShares Currency Hedged MSCI Germany ETF iShares Currency Hedged MSCI Japan ETF iShares Currency Hedged MSCI Mexico ETF iShares Currency Hedged MSCI United Kingdom ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares Core MSCI Emerging Markets ETF iShares ESG Aware MSCI EM ETF iShares MSCI Brazil ETF iShares MSCI BRIC ETF iShares MSCI Chile ETF iShares MSCI Colombia ETF iShares MSCI Emerging Markets Asia ETF iShares MSCI Emerging Markets ETF iShares MSCI Emerging Markets Min Vol Factor ETF iShares MSCI Emerging Markets Multifactor ETF iShares MSCI Emerging Markets Small-Cap ETF iShares MSCI Global Agriculture Producers ETF iShares MSCI Global Energy Producers ETF iShares MSCI Global Gold Miners ETF iShares MSCI Global Metals & Mining Producers ETF iShares MSCI Global Min Vol Factor ETF iShares MSCI Global Silver and Metals Miners ETF iShares MSCI Malaysia ETF iShares MSCI South Korea ETF iShares MSCI Taiwan ETF Supplement to the Summary Prospectus and Prospectus both dat ed as of Decem ber 30, 2020 (as revised March 1, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Frontier and Select EM ETF Supplement to the Summary Prospectus dated March 24, 2021, and to the Prospectus and the Statement of Additional Information both dated as of March 16, 2021: iShares International Developed Small Cap Value Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| Label | Element | Value |
|---|---|---|
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised January 28, 2021): iShares Currency Hedged JPX-Nikkei 400 ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Asia 50 ETF iShares Global 100 ETF iShares Global Comm Services ETF iShares Global Consumer Discretionary ETF iShares Global Healthcare ETF iShares Global Materials ETF iShares Global Tech ETF iShares Global Timber & Forestry ETF iShares India 50 ETF iShares Latin America 40 ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised October 30, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Emerging Markets Infrastructure ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised December 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares International Dividend Growth ETF Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Europe ETF iShares Global Consumer Staples ETF iShares Global Energy ETF iShares Global Financials ETF iShares Global Industrials ETF iShares Global Infrastructure ETF iShares International Developed Property ETF iShares International Preferred Stock ETF iShares JPX-Nikkei 400 ETF iShares North American Natural Resources ETF Supplement to the Summary Prospectus, Prospectus and Statement of Additional Information all dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Clean Energy ETF Supplement to the Summary Prospectus, Prospectus and Statement of Additional Information all dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Utilities ETF Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of September 1, 2020 (as revised September 30, 2020): iShares Asia/Pacific Dividend ETF Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020 (as revised November 23, 2020), and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares Emerging Markets Dividend ETF Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020, and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares Global REIT ETF Supplement to the Summary Prospectus dated as of September 1, 2020 and Prospectus dated as of September 1, 2020 (as revised December 7, 2020), and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares International Select Dividend ETF Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020, and to the Statement of Additional Information dated as of September 1, 2020 (as April 19, 2021): iShares International Developed Real Estate ETF Supplement to the Summary Prospectus dated as of September 30, 2020, and to the Prospectus dated as of September 22, 2020, and to the Statement of Additional Information dated as of September 22, 2020 (as revised January 14, 2021): iShares Virtual Work and Life Multisector ETF Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of December 1, 2020: iShares Core MSCI Europe ETF iShares Core MSCI Pacific ETF iShares MSCI Kokusai ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares China Large-Cap ETF iShares MSCI EAFE ETF iShares MSCI EAFE Growth ETF iShares MSCI EAFE Min Vol Factor ETF iShares MSCI EAFE Small -CapiShares MSCI EAFE Value ETF iShares MSCI Europe Financials ETF iShares MSCI Europe Small -CapiShares MSCI Intl Momentum Factor ETF iShares MSCI Intl Multifactor ETF iShares MSCI Intl Quality Factor ETF iShares MSCI Intl Size Factor ETF iShares MSCI Intl Small-Cap Multifactor ETF iShares MSCI Intl Value Factor ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Core MSCI EAFE ETF iShares Core MSCI International Developed Markets ETF iShares Core MSCI Total International Stock ETF iShares Cybersecurity and Tech ETF iShares Exponential Technologies ETF iShares Genomics Immunology and Healthcare ETF iShares MSCI ACWI ETF iShares MSCI ACWI ex U.S. ETF iShares MSCI ACWI Low Carbon Target ETF iShares MSCI All Country Asia ex Japan ETF iShares MSCI China A ETF iShares MSCI Global Multifactor ETF iShares Robotics and Artificial Intelligence Multisector ETF iShares Self-Driving EV and Tech ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 28, 2021): iShares Adaptive Currency Hedged MSCI EAFE ETF iShares Currency Hedged MSCI ACWI ex U.S. ETF iShares Currency Hedged MSCI EAFE ETF iShares Currency Hedged MSCI EAFE Small-Cap ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares ESG Advanced MSCI EAFE ETF iShares ESG Aware MSCI EAFE ETF iShares MSCI Denmark ETF iShares MSCI Finland ETF iShares MSCI Germany Small-Cap ETF iShares MSCI Indonesia ETF iShares MSCI Ireland ETF iShares MSCI Japan Equal Weighted ETF iShares MSCI Japan Value ETF iShares MSCI New Zealand ETF iShares MSCI Norway ETF iShares MSCI Poland ETF iShares MSCI United Kingdom ETF iShares MSCI United Kingdom Small-Cap ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Australia ETF iShares MSCI Austria ETF iShares MSCI Belgium ETF iShares MSCI Canada ETF iShares MSCI Eurozone ETF iShares MSCI France ETF iShares MSCI Germany ETF iShares MSCI Israel ETF iShares MSCI Italy ETF iShares MSCI Japan ETF iShares MSCI Japan Small-Cap ETF iShares MSCI Mexico ETF iShares MSCI Netherlands ETF iShares MSCI Pacific ex Japan ETF iShares MSCI Russia ETF iShares MSCI Singapore ETF iShares MSCI South Africa ETF iShares MSCI Spain ETF iShares MSCI Sweden ETF iShares MSCI Switzerland ETF iShares MSCI Thailand ETF iShares MSCI Turkey ETF iShares MSCI World ETF Supplement to the Summary Prospectus dated as of December 30, 2020, and Prosp ectus dated as of December 30, 2020 (as revised January 7, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Philippines ETF Supplement to the Summary Prospectus dated as of December 30, 2020, and Prospectus dated as of December 30, 2020 (as revised January 7, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Hong Kong ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares ESG Advanced MSCI EM ETF iShares ESG MSCI EM Leaders ETF iShares MSCI Argentina and Global Exposure ETF iShares MSCI Brazil Small-Cap ETF iShares MSCI China ETF iShares MSCI China Small-Cap ETF iShares MSCI Emerging Markets ex China ETF iShares MSCI Global Impact ETF iShares MSCI India ETF iShares MSCI India Small-Cap ETF iShares MSCI Kuwait ETF iShares MSCI Peru ETF iShares MSCI Qatar ETF iShares MSCI Saudi Arabia ETF iShares MSCI UAE ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Canada ETF iShares Currency Hedged MSCI Emerging Markets ETF iShares Currency Hedged MSCI Eurozone ETF iShares Currency Hedged MSCI Germany ETF iShares Currency Hedged MSCI Japan ETF iShares Currency Hedged MSCI Mexico ETF iShares Currency Hedged MSCI United Kingdom ETF Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares Core MSCI Emerging Markets ETF iShares ESG Aware MSCI EM ETF iShares MSCI Brazil ETF iShares MSCI BRIC ETF iShares MSCI Chile ETF iShares MSCI Colombia ETF iShares MSCI Emerging Markets Asia ETF iShares MSCI Emerging Markets ETF iShares MSCI Emerging Markets Min Vol Factor ETF iShares MSCI Emerging Markets Multifactor ETF iShares MSCI Emerging Markets Small-Cap ETF iShares MSCI Global Agriculture Producers ETF iShares MSCI Global Energy Producers ETF iShares MSCI Global Gold Miners ETF iShares MSCI Global Metals & Mining Producers ETF iShares MSCI Global Min Vol Factor ETF iShares MSCI Global Silver and Metals Miners ETF iShares MSCI Malaysia ETF iShares MSCI South Korea ETF iShares MSCI Taiwan ETF Supplement to the Summary Prospectus and Prospectus both dat ed as of Decem ber 30, 2020 (as revised March 1, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Frontier and Select EM ETF Supplement to the Summary Prospectus dated March 24, 2021, and to the Prospectus and the Statement of Additional Information both dated as of March 16, 2021: iShares International Developed Small Cap Value Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged JPX-Nikkei 400 ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised January 28, 2021): iShares Currency Hedged JPX-Nikkei 400 ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Asia 50 ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Asia 50 ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global 100 ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Global 100 ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Comm Services ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Comm Services ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Consumer Discretionary ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Consumer Discretionary ETF iShares Global Healthcare ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Healthcare ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Materials ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Materials ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Tech ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Tech ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Timber & Forestry ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Timber & Forestry ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares India 50 ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares India 50 ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Latin America 40 ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statemen t of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Latin America 40 ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Emerging Markets Infrastructure ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised October 30, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares Emerging Markets Infrastructure ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares International Dividend Growth ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised December 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised April 19, 2021): iShares International Dividend Growth ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Europe ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Europe ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Consumer Staples ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Consumer Staples ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Energy ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Energy ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Financials ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Financials ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Industrials ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Industrials ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Infrastructure ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Infrastructure ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares International Developed Property ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares International Developed Property ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares International Preferred Stock ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares International Preferred Stock ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares JPX-Nikkei 400 ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares JPX-Nikkei 400 ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares North American Natural Resources ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of July 31, 2020 (as revised August 17, 2020), and to the Statement of Additional Information dated as of July 31, 2020 (as revised May 3, 2021): iShares North American Natural Resources ETF |
| iShares Trust | iShares Global Clean Energy ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus, Prospectus and Statement of Additional Information all dated as of July 31, 2020 (as revised April 19, 2021): iShares Global Clean Energy ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global Utilities ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus, Prospectus and Statement of Additional Information all dated as of July 31, 2020 (as revised May 3, 2021): iShares Global Utilities ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Global REIT ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020, and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares Global REIT ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares International Select Dividend ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus dated as of September 1, 2020 and Prospectus dated as of September 1, 2020 (as revised December 7, 2020), and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares International Select Dividend ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares International Developed Real Estate ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020, and to the Statement of Additional Information dated as of September 1, 2020 (as April 19, 2021): iShares International Developed Real Estate ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Virtual Work and Life Multisector ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus dated as of September 30, 2020, and to the Prospectus dated as of September 22, 2020, and to the Statement of Additional Information dated as of September 22, 2020 (as revised January 14, 2021): iShares Virtual Work and Life Multisector ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Core MSCI Europe ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of December 1, 2020: iShares Core MSCI Europe ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Core MSCI Pacific ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of December 1, 2020: iShares Core MSCI Pacific ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Kokusai ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of December 1, 2020: iShares MSCI Kokusai ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares China Large-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares China Large-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI EAFE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI EAFE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI EAFE Growth ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI EAFE Growth ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI EAFE Min Vol Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI EAFE Min Vol Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI EAFE Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI EAFE Small -CapIf you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI EAFE Value ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI EAFE Value ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Europe Financials ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Europe Financials ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Europe Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Europe Small -Cap |
| iShares Trust | iShares MSCI Intl Momentum Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Intl Momentum Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Intl Multifactor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Intl Multifactor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Intl Quality Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Intl Quality Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Intl Size Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Intl Size Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Intl Small-Cap Multifactor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Intl Small-Cap Multifactor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Intl Value Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised December 17, 2020): iShares MSCI Intl Value Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Core MSCI EAFE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Core MSCI EAFE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Core MSCI International Developed Markets ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Core MSCI International Developed Markets ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Core MSCI Total International Stock ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Core MSCI Total International Stock ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Cybersecurity and Tech ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Cybersecurity and Tech ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Exponential Technologies ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Exponential Technologies ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Genomics Immunology and Healthcare ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Genomics Immunology and Healthcare ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI ACWI ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares MSCI ACWI ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI ACWI ex U.S. ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares MSCI ACWI ex U.S. ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI ACWI Low Carbon Target ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares MSCI ACWI Low Carbon Target ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI All Country Asia ex Japan ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares MSCI All Country Asia ex Japan ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI China A ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares MSCI China A ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Global Multifactor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares MSCI Global Multifactor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Robotics and Artificial Intelligence Multisector ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Robotics and Artificial Intelligence Multisector ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Self-Driving EV and Tech ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 14, 2021): iShares Self-Driving EV and Tech ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Adaptive Currency Hedged MSCI EAFE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 28, 2021): iShares Adaptive Currency Hedged MSCI EAFE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI ACWI ex U.S. ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI ACWI ex U.S. ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI EAFE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI EAFE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI EAFE Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 1, 2020, and to the Statement of Additional Information dated as of December 1, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI EAFE Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares ESG Advanced MSCI EAFE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares ESG Advanced MSCI EAFE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares ESG Aware MSCI EAFE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares ESG Aware MSCI EAFE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Denmark ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Denmark ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Finland ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Finland ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Germany Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Germany Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Indonesia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Indonesia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Ireland ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Ireland ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Japan Equal Weighted ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Japan Equal Weighted ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Japan Value ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Japan Value ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI New Zealand ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI New Zealand ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Norway ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Norway ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Poland ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Poland ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI United Kingdom ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI United Kingdom ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI United Kingdom Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI United Kingdom Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Philippines ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus dated as of December 30, 2020, and Prosp ectus dated as of December 30, 2020 (as revised January 7, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised May 3, 2021): iShares MSCI Philippines ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares ESG Advanced MSCI EM ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares ESG Advanced MSCI EM ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares ESG MSCI EM Leaders ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares ESG MSCI EM Leaders ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Argentina and Global Exposure ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Argentina and Global Exposure ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Brazil Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Brazil Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI China ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI China ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI China Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI China Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Global Impact ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Global Impact ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI India ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI India ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI India Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI India Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Kuwait ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Kuwait ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Peru ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Peru ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Qatar ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Qatar ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI Saudi Arabia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Saudi Arabia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares MSCI UAE ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI UAE ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI Canada ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Canada ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI Eurozone ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Eurozone ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI Germany ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Germany ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI Japan ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Japan ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI Mexico ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Mexico ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares Currency Hedged MSCI United Kingdom ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI United Kingdom ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares Trust | iShares International Developed Small Cap Value Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares Trust Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus dated March 24, 2021, and to the Prospectus and the Statement of Additional Information both dated as of March 16, 2021: iShares International Developed Small Cap Value Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares Asia/Pacific Dividend ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus, Prospectus and the Statement of Additional Information all dated as of September 1, 2020 (as revised September 30, 2020): iShares Asia/Pacific Dividend ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares Emerging Markets Dividend ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of September 1, 2020 (as revised November 23, 2020), and to the Statement of Additional Information dated as of September 1, 2020 (as revised January 14, 2021): iShares Emerging Markets Dividend ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Australia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Australia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Austria ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Austria ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Belgium ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Belgium ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Canada ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Canada ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Eurozone ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Eurozone ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI France ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI France ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Germany ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Germany ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Israel ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Israel ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Italy ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Italy ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Japan ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Japan ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Japan Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Japan Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Mexico ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Mexico ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Netherlands ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Netherlands ETF |
| iShares, Inc. | iShares MSCI Pacific ex Japan ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Pacific ex Japan ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Russia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Russia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Singapore ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Singapore ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI South Africa ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI South Africa ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Spain ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Spain ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Sweden ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Sweden ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Switzerland ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Switzerland ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Thailand ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Thailand ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Turkey ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI Turkey ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI World ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information all dated as of December 30, 2020 (as revised April 9, 2021: iShares MSCI World ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Hong Kong ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus dated as of December 30, 2020, and Prospectus dated as of December 30, 2020 (as revised January 7, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Hong Kong ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Emerging Markets ex China ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 14, 2021): iShares MSCI Emerging Markets ex China ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares Currency Hedged MSCI Emerging Markets ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised January 28, 2021): iShares Currency Hedged MSCI Emerging Markets ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares Core MSCI Emerging Markets ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares Core MSCI Emerging Markets ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares ESG Aware MSCI EM ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares ESG Aware MSCI EM ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Brazil ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Brazil ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI BRIC ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI BRIC ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Chile ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Chile ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Colombia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Colombia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Emerging Markets Asia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Emerging Markets Asia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Emerging Markets ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Emerging Markets ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Emerging Markets Min Vol Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Emerging Markets Min Vol Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Emerging Markets Multifactor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Emerging Markets Multifactor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Emerging Markets Small-Cap ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Emerging Markets Small-Cap ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Global Agriculture Producers ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Global Agriculture Producers ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Global Energy Producers ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Global Energy Producers ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Global Gold Miners ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Global Gold Miners ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Global Metals & Mining Producers ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Global Metals & Mining Producers ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Global Min Vol Factor ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Global Min Vol Factor ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Global Silver and Metals Miners ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Global Silver and Metals Miners ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Malaysia ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Malaysia ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI South Korea ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI South Korea ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Taiwan ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dated as of December 30, 2020, and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Taiwan ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| iShares, Inc. | iShares MSCI Frontier and Select EM ETF | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | iShares ® iShares, Inc. Supplement dated May 3, 2021 (the “Supplement”) to the Summary Prospectus (the “Summary Prospectus”), Prospectus (the “Prospectus”) and Statement of Additional Information (“SAI”) for each of the Funds listed below (each, a “Fund”) The information in this Supplement updates information in, and should be read in conjunction with, each Fund’s Summary Prospectus, Prospectus and SAI. Change in each Fund’s “Principal Investment Strategies” The following paragraph of the section of the Summary Prospectus and Prospectus entitled “Principal Investment Strategies” for each of the Funds listed in Appendix A, except for the iShares ESG Advanced MSCI EAFE ETF, iShares ESG Aware MSCI EAFE ETF, iShares ESG Advanced MSCI EM ETF, iShares ESG MSCI EM Leaders ETF and iShares ESG Aware MSCI EM ETF, shall be deleted in its entirety and replaced with the following: The Fund generally will invest at least 80% of its assets in the component securities of its underlying index and in investments that have economic characteristics that are substantially identical to the component securities of its Underlying Index ( i.e Change in each Fund’s “Summary of Principal Risks” The “Tracking Error Risk” paragraph of the section of the Summary Prospectus and Prospectus entitled “Summary of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Further Discussion of Principal Risks” The paragraph entitled “Tracking Error Risk” in the section of the Prospectus entitled “Further Discussion of Principal Risks” for each of the Funds shall be amended to add the following: Tracking error may occur due to differences between the methodologies used in calculating the index value and determining the Fund’s NAV. Change in each Fund’s “Shareholder Information” The paragraphs entitled “Determination of Net Asset Value” of the section of the Prospectus entitled “Shareholder Information” for each of the Funds shall be deleted in its entirety and replaced with the following: Determination of Net Asset Value. The value of the securities and other assets and liabilities held by the Fund are determined pursuant to valuation policies and procedures approved by the Board. Equity securities and other equity instruments for which market quotations are readily available are valued at market value, which is generally determined using the last reported official closing price or, if a reported closing price is not available, the last traded price on the exchange or market on which the security or instrument is primarily traded at the time of valuation. Shares of underlying open-end funds (including money market funds) are valued at net asset value. Shares of underlying exchange-traded closed-end funds or other ETFs are valued at their most recent closing price. Generally, trading in non-U.S. securities and money market instruments is substantially completed each day at various times prior to the close of business on the NYSE. The values of such securities used in computing the NAV of the Fund are determined as of such times. When market quotations are not readily available or are believed by BlackRock to be unreliable, the Fund’s investments are valued at fair value. Fair value determinations are made by BlackRock in accordance with policies and procedures approved by the Board. BlackRock may conclude that a market quotation is not readily available or is unreliable if a security or other asset or liability does not have a price source due to its lack of trading or other reasons, if a market quotation differs significantly from recent price quotations or otherwise no longer appears to reflect fair value, where the security or other asset or liability is thinly traded, when there is a significant event subsequent to the most recent market quotation, or if the trading market on which a security is listed is suspended or closed and no appropriate alternative trading market is available. A “significant event” is deemed to occur if BlackRock determines, in its reasonable business judgment prior to or at the time of pricing the Fund’s assets or liabilities, that the event is likely to cause a material change to the closing market price of one or more assets held by, or liabilities of , For certain foreign assets, a third-party vendor supplies evaluated, systematic fair value pricing based upon the movement of a proprietary multi-factor model after the relevant foreign markets have closed. This systematic fair value pricing methodology is designed to correlate the prices of foreign assets in one or more non-U.S. markets following the close of the local markets to the prices that might have prevailed as of a Fund’s pricing time. Fair value represents a good faith approximation of the value of an asset or liability. The fair value of an asset or liability held by the Fund is the amount the Fund might reasonably expect to receive from the current sale of that asset or the cost to extinguish that liability in an arm’s-length transaction. Valuing the Fund’s investments using fair value pricing will result in prices that may differ from current market valuations and that may not be the prices at which those investments could have been sold during the period in which the particular fair values were used. Use of fair value prices and certain current market valuations could result in a difference between the prices used to calculate the Fund’s NAV and the prices used by the Underlying Index, which, in turn, could result in a difference between the Fund’s performance and the performance of the Underlying Index. Appendix A iShares Funds Supplement to the Summary Prospectus and Prospectus both dat ed as of Decem ber 30, 2020 (as revised March 1, 2021), and to the Statement of Additional Information dated as of December 30, 2020 (as revised April 9, 2021): iShares MSCI Frontier and Select EM ETF If you have any questions, please call 1-800-iShares (1-800-474-2737). iShares ® is a registered trademark of BlackRock Fund Advisors and its affiliates. |
| Label | Element | Value |
|---|---|---|
| Risk/Return: | rr_RiskReturnAbstract | |
| Registrant Name | dei_EntityRegistrantName | iShares, Inc. |
| Prospectus Date | rr_ProspectusDate | May 03, 2021 |
| Document Creation Date | dei_DocumentCreationDate | May 03, 2021 |
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