Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds IV BlackRock Advantage SMID Cap Fund, Inc. BlackRock Allocation Target Shares BATS: Series A Portfolio BATS: Series C Portfolio BATS: Series E Portfolio BATS: Series M Portfolio BATS: Series P Portfolio BATS: Series S Portfolio BlackRock Bond Fund, Inc. BlackRock Sustainable Total Return Fund BlackRock Total Return Fund BlackRock California Municipal Series Trust BlackRock California Municipal Opportunities Fund BlackRock Emerging Markets Fund, Inc. BlackRock Funds^SM BlackRock Advantage Emerging Markets Fund BlackRock Advantage International Fund BlackRock Advantage Large Cap Growth Fund BlackRock Advantage Small Cap Core Fund BlackRock Advantage Small Cap Growth Fund BlackRock China A Opportunities Fund BlackRock Commodity Strategies Fund BlackRock Defensive Advantage Emerging Markets Fund BlackRock Defensive Advantage International Fund BlackRock Defensive Advantage U.S. Fund BlackRock Energy Opportunities Fund BlackRock Exchange Portfolio BlackRock Global Equity Absolute Return Fund BlackRock Global Impact Fund BlackRock Global Long/Short Equity Fund BlackRock High Equity Income Fund BlackRock Infrastructure Sustainable Opportunities Fund BlackRock International Dividend Fund BlackRock International Impact Fund BlackRock Mid‑Cap Growth Equity Portfolio BlackRock SMID‑Cap Growth Equity Fund BlackRock Sustainable Advantage Emerging Markets Equity Fund BlackRock Sustainable Advantage International Equity Fund BlackRock Sustainable Advantage Large Cap Core Fund BlackRock Tactical Opportunities Fund BlackRock Technology Opportunities Fund BlackRock Total Factor Fund BlackRock Funds II BlackRock 20/80 Target Allocation Fund BlackRock 40/60 Target Allocation Fund BlackRock 60/40 Target Allocation Fund BlackRock 80/20 Target Allocation Fund BlackRock Dynamic High Income Portfolio BlackRock Global Dividend Portfolio BlackRock Managed Income Fund BlackRock Multi-Asset Income Portfolio BlackRock Retirement Income 2030 Fund BlackRock Retirement Income 2040 Fund BlackRock Funds III BlackRock LifePath^® Dynamic 2025 Fund BlackRock LifePath^® Dynamic 2030 Fund BlackRock LifePath^® Dynamic 2035 Fund BlackRock LifePath^® Dynamic 2040 Fund BlackRock LifePath^® Dynamic 2045 Fund BlackRock LifePath^® Dynamic 2050 Fund BlackRock LifePath^® Dynamic 2055 Fund BlackRock LifePath^® Dynamic 2060 Fund BlackRock LifePath^® Dynamic 2065 Fund BlackRock LifePath^® Dynamic Retirement Fund BlackRock Funds IV BlackRock Global Long/Short Credit Fund BlackRock Sustainable Advantage CoreAlpha Bond Fund BlackRock Systematic Multi-Strategy Fund BlackRock Funds V BlackRock Core Bond Portfolio BlackRock Floating Rate Income Portfolio BlackRock GNMA Portfolio BlackRock High Yield Bond Portfolio BlackRock Income Fund BlackRock Inflation Protected Bond Portfolio BlackRock Low Duration Bond Portfolio BlackRock Strategic Income Opportunities Portfolio BlackRock Sustainable Emerging Markets Bond Fund BlackRock Sustainable Emerging Markets Flexible Bond Fund BlackRock Sustainable High Yield Bond Fund BlackRock Sustainable Low Duration Bond Fund BlackRock U.S. Government Bond Portfolio BlackRock Funds VI BlackRock Advantage CoreAlpha Bond Fund BlackRock Funds VII, Inc. BlackRock Sustainable Emerging Markets Equity Fund BlackRock Sustainable International Equity Fund BlackRock Sustainable U.S. Growth Equity Fund BlackRock Sustainable U.S. Value Equity Fund BlackRock Global Allocation Fund, Inc. BlackRock Large Cap Series Funds, Inc. BlackRock Advantage Large Cap Core Fund BlackRock Advantage Large Cap Value Fund BlackRock Event Driven Equity Fund BlackRock Multi-State Municipal Series Trust BlackRock New York Municipal Opportunities Fund BlackRock Municipal Bond Fund, Inc. BlackRock High Yield Municipal Fund BlackRock Impact Municipal Fund BlackRock National Municipal Fund BlackRock Short-Term Municipal Fund BlackRock Municipal Series Trust BlackRock Strategic Municipal Opportunities Fund BlackRock Natural Resources Trust BlackRock Series Fund, Inc. BlackRock Advantage Large Cap Core Portfolio BlackRock Global Allocation Portfolio BlackRock Sustainable Balanced Portfolio BlackRock Series Fund II, Inc. BlackRock High Yield Portfolio BlackRock U.S. Government Bond Portfolio BlackRock Series, Inc. BlackRock International Fund BlackRock Strategic Global Bond Fund, Inc. BlackRock Sustainable Balanced Fund, Inc. BlackRock Unconstrained Equity Fund BlackRock Variable Series Funds, Inc. BlackRock Advantage Large Cap Core V.I. Fund BlackRock Advantage Large Cap Value V.I. Fund BlackRock Advantage SMID Cap V.I. Fund BlackRock Global Allocation V.I. Fund BlackRock International Index V.I. Fund BlackRock International V.I. Fund BlackRock Large Cap Focus Growth V.I. Fund BlackRock Managed Volatility V.I. Fund BlackRock S&P 500 Index V.I. Fund BlackRock Small Cap Index V.I. Fund BlackRock Variable Series Funds II, Inc. BlackRock High Yield V.I. Fund BlackRock Total Return V.I. Fund BlackRock U.S. Government Bond V.I. Fund Managed Account Series BlackRock GA Disciplined Volatility Equity Fund BlackRock GA Dynamic Equity Fund Managed Account Series II BlackRock U.S. Mortgage Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Advantage Global Fund, Inc. \| BLACKROCK ADVANTAGE GLOBAL FUND, INC.
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds IV (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Advantage SMID Cap Fund, Inc. \| BlackRock Advantage SMID Cap Fund, Inc.
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Advantage SMID Cap Fund, Inc. (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Allocation Target Shares \| BATS: Series A Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Allocation Target Shares BATS: Series A Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Allocation Target Shares \| BATS: Series C Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Allocation Target Shares BATS: Series C Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Allocation Target Shares \| BATS: Series E Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Allocation Target Shares BATS: Series E Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Allocation Target Shares \| BATS: Series M Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Allocation Target Shares BATS: Series M Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Allocation Target Shares \| BATS: Series P Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Allocation Target Shares BATS: Series P Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Allocation Target Shares \| BATS: Series S Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Allocation Target Shares BATS: Series S Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Bond Fund, Inc. \| BlackRock Sustainable Total Return Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Bond Fund, Inc. BlackRock Sustainable Total Return Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Bond Fund, Inc. \| BlackRock Total Return Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Bond Fund, Inc. BlackRock Total Return Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock California Municipal Series Trust \| BlackRock California Municipal Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock California Municipal Series Trust BlackRock California Municipal Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Emerging Markets Fund, Inc. \| BlackRock Emerging Markets Fund, Inc.
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Emerging Markets Fund, Inc. (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Advantage Emerging Markets Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Advantage Emerging Markets Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Advantage International Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Advantage International Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Advantage Large Cap Growth Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Advantage Large Cap Growth Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Advantage Small Cap Core Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Advantage Small Cap Core Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Advantage Small Cap Growth Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Advantage Small Cap Growth Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock China A Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock China A Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Commodity Strategies Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Commodity Strategies Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Defensive Advantage Emerging Markets Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Defensive Advantage Emerging Markets Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Defensive Advantage International Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Defensive Advantage International Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Defensive Advantage U.S. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Defensive Advantage U.S. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Energy Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Energy Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Exchange Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Exchange Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Global Equity Absolute Return Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Global Equity Absolute Return Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Global Impact Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Global Impact Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Global Long/Short Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Global Long/Short Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock High Equity Income Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock High Equity Income Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Infrastructure Sustainable Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Infrastructure Sustainable Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock International Dividend Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock International Dividend Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock International Impact Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock International Impact Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Mid-Cap Growth Equity Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Mid‑Cap Growth Equity Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock SMID-Cap Growth Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock SMID‑Cap Growth Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Sustainable Advantage Emerging Markets Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Sustainable Advantage Emerging Markets Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Sustainable Advantage International Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Sustainable Advantage International Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Sustainable Advantage Large Cap Core Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Sustainable Advantage Large Cap Core Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Tactical Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Tactical Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Technology Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Technology Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds \| BlackRock Total Factor Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds^SM BlackRock Total Factor Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock 20/80 Target Allocation Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock 20/80 Target Allocation Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock 40/60 Target Allocation Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock 40/60 Target Allocation Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock 60/40 Target Allocation Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock 60/40 Target Allocation Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock 80/20 Target Allocation Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock 80/20 Target Allocation Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock Dynamic High Income Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock Dynamic High Income Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock Global Dividend Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock Global Dividend Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock Managed Income Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock Managed Income Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock Multi-Asset Income Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock Multi-Asset Income Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock Retirement Income 2030 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock Retirement Income 2030 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds II \| BlackRock Retirement Income 2040 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds II BlackRock Retirement Income 2040 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2025 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2025 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2030 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2030 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2035 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2035 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2040 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2040 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2045 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2045 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2050 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2050 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2055 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2055 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2060 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2060 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic 2065 Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic 2065 Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds III \| BlackRock LifePath Dynamic Retirement Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds III BlackRock LifePath^® Dynamic Retirement Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds IV \| BlackRock Global Long/Short Credit Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds IV BlackRock Global Long/Short Credit Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds IV \| BlackRock Sustainable Advantage CoreAlpha Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds IV BlackRock Sustainable Advantage CoreAlpha Bond Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds IV \| BlackRock Systematic Multi-Strategy Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds IV BlackRock Systematic Multi-Strategy Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Core Bond Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Core Bond Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Floating Rate Income Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Floating Rate Income Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock GNMA Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock GNMA Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock High Yield Bond Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock High Yield Bond Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Income Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Income Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Inflation Protected Bond Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Inflation Protected Bond Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Low Duration Bond Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Low Duration Bond Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Strategic Income Opportunities Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Strategic Income Opportunities Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Sustainable Emerging Markets Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Sustainable Emerging Markets Bond Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Sustainable Emerging Markets Flexible Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Sustainable Emerging Markets Flexible Bond Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Sustainable High Yield Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Sustainable High Yield Bond Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock Sustainable Low Duration Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock Sustainable Low Duration Bond Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds V \| BlackRock U.S. Government Bond Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds V BlackRock U.S. Government Bond Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds VI \| BlackRock Advantage CoreAlpha Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds VI BlackRock Advantage CoreAlpha Bond Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds VII, Inc. \| BlackRock Sustainable Emerging Markets Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds VII, Inc. BlackRock Sustainable Emerging Markets Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds VII, Inc. \| BlackRock Sustainable International Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds VII, Inc. BlackRock Sustainable International Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds VII, Inc. \| BlackRock Sustainable U.S. Growth Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds VII, Inc. BlackRock Sustainable U.S. Growth Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Funds VII, Inc. \| BlackRock Sustainable U.S. Value Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Funds VII, Inc. BlackRock Sustainable U.S. Value Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Global Allocation Fund, Inc. \| BlackRock Global Allocation Fund, Inc.
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Global Allocation Fund, Inc. (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Large Cap Series Funds, Inc. \| BlackRock Advantage Large Cap Core Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Large Cap Series Funds, Inc. BlackRock Advantage Large Cap Core Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Large Cap Series Funds, Inc. \| BlackRock Advantage Large Cap Value Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Large Cap Series Funds, Inc. BlackRock Advantage Large Cap Value Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Large Cap Series Funds, Inc. \| BlackRock Event Driven Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Large Cap Series Funds, Inc. BlackRock Event Driven Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BLACKROCK MULTI STATE MUNICIPAL SERIES TRUST \| BlackRock New York Municipal Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Multi-State Municipal Series Trust BlackRock New York Municipal Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Municipal Bond Fund, Inc. \| BlackRock High Yield Municipal Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Municipal Bond Fund, Inc. BlackRock High Yield Municipal Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Municipal Bond Fund, Inc. \| BlackRock Impact Municipal Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Municipal Bond Fund, Inc. BlackRock Impact Municipal Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Municipal Bond Fund, Inc. \| BlackRock National Municipal Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Municipal Bond Fund, Inc. BlackRock National Municipal Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Municipal Bond Fund, Inc. \| BlackRock Short-Term Municipal Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Municipal Bond Fund, Inc. BlackRock Short-Term Municipal Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Municipal Series Trust \| BlackRock Strategic Municipal Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Municipal Series Trust BlackRock Strategic Municipal Opportunities Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Natural Resources Trust \| BlackRock Natural Resources Trust
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Natural Resources Trust (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Series Fund, Inc. \| BlackRock Advantage Large Cap Core Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Series Fund, Inc. BlackRock Advantage Large Cap Core Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Series Fund, Inc. \| BlackRock Global Allocation Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Series Fund, Inc. BlackRock Global Allocation Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Series Fund, Inc. \| BlackRock Sustainable Balanced Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Series Fund, Inc. BlackRock Sustainable Balanced Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Series Fund II, Inc. \| BlackRock High Yield Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Series Fund II, Inc. BlackRock High Yield Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Series Fund II, Inc. \| BlackRock U.S. Government Bond Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Series Fund II, Inc. BlackRock U.S. Government Bond Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Series, Inc. \| BlackRock International Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Series, Inc. BlackRock International Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Strategic Global Bond Fund, Inc. \| BlackRock Strategic Global Bond Fund, Inc.
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Strategic Global Bond Fund, Inc. (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Sustainable Balanced Fund, Inc. \| BlackRock Sustainable Balanced Fund, Inc.
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Sustainable Balanced Fund, Inc. (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Unconstrained Equity Fund \| BlackRock Unconstrained Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Unconstrained Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Advantage Large Cap Core V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Advantage Large Cap Core V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Advantage Large Cap Value V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Advantage Large Cap Value V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Advantage SMID Cap V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Advantage SMID Cap V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Global Allocation V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Global Allocation V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock International Index V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock International Index V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock International V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock International V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Large Cap Focus Growth V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Large Cap Focus Growth V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Managed Volatility V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Managed Volatility V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock S&P 500 Index V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock S&P 500 Index V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds, Inc. \| BlackRock Small Cap Index V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds, Inc. BlackRock Small Cap Index V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds II, Inc. \| BlackRock High Yield V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds II, Inc. BlackRock High Yield V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds II, Inc. \| BlackRock Total Return V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds II, Inc. BlackRock Total Return V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
BlackRock Variable Series Funds II, Inc. \| BlackRock U.S. Government Bond V.I. Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	BlackRock Variable Series Funds II, Inc. BlackRock U.S. Government Bond V.I. Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
Managed Account Series \| BlackRock GA Disciplined Volatility Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	Managed Account Series BlackRock GA Disciplined Volatility Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
Managed Account Series \| BlackRock GA Dynamic Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	Managed Account Series BlackRock GA Dynamic Equity Fund (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.
Managed Account Series II \| BlackRock U.S. Mortgage Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	Managed Account Series II BlackRock U.S. Mortgage Portfolio (each, a “Fund” and collectively, the “Funds”) Supplement dated July 18, 2022 (the “Supplement”) to the Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable: The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following: Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.

rr_SupplementToProspectusTextBlock

BlackRock Funds IV

BlackRock Advantage SMID Cap Fund, Inc.

BlackRock Allocation Target Shares

BATS: Series A Portfolio

BATS: Series C Portfolio

BATS: Series E Portfolio

BATS: Series M Portfolio

BATS: Series P Portfolio

BATS: Series S Portfolio

BlackRock Bond Fund, Inc.

BlackRock Sustainable Total Return Fund

BlackRock Total Return Fund

BlackRock California Municipal Series Trust

BlackRock California Municipal Opportunities Fund

BlackRock Emerging Markets Fund, Inc.

BlackRock Funds^SM

BlackRock Advantage Emerging Markets Fund

BlackRock Advantage International Fund

BlackRock Advantage Large Cap Growth Fund

BlackRock Advantage Small Cap Core Fund

BlackRock Advantage Small Cap Growth Fund

BlackRock China A Opportunities Fund

BlackRock Commodity Strategies Fund

BlackRock Defensive Advantage Emerging Markets Fund

BlackRock Defensive Advantage International Fund

BlackRock Defensive Advantage U.S. Fund

BlackRock Energy Opportunities Fund

BlackRock Exchange Portfolio

BlackRock Global Equity Absolute Return Fund

BlackRock Global Impact Fund

BlackRock Global Long/Short Equity Fund

BlackRock High Equity Income Fund

BlackRock Infrastructure Sustainable Opportunities Fund

BlackRock International Dividend Fund

BlackRock International Impact Fund

BlackRock Mid‑Cap Growth Equity Portfolio

BlackRock SMID‑Cap Growth Equity Fund

BlackRock Sustainable Advantage Emerging Markets Equity Fund

BlackRock Sustainable Advantage International Equity Fund

BlackRock Sustainable Advantage Large Cap Core Fund

BlackRock Tactical Opportunities Fund

BlackRock Technology Opportunities Fund

BlackRock Total Factor Fund

BlackRock Funds II

BlackRock 20/80 Target Allocation Fund

BlackRock 40/60 Target Allocation Fund

BlackRock 60/40 Target Allocation Fund

BlackRock 80/20 Target Allocation Fund

BlackRock Dynamic High Income Portfolio

BlackRock Global Dividend Portfolio

BlackRock Managed Income Fund

BlackRock Multi-Asset Income Portfolio

BlackRock Retirement Income 2030 Fund

BlackRock Retirement Income 2040 Fund

BlackRock Funds III

BlackRock LifePath^® Dynamic 2025 Fund

BlackRock LifePath^® Dynamic 2030 Fund

BlackRock LifePath^® Dynamic 2035 Fund

BlackRock LifePath^® Dynamic 2040 Fund

BlackRock LifePath^® Dynamic 2045 Fund

BlackRock LifePath^® Dynamic 2050 Fund

BlackRock LifePath^® Dynamic 2055 Fund

BlackRock LifePath^® Dynamic 2060 Fund

BlackRock LifePath^® Dynamic 2065 Fund

BlackRock LifePath^® Dynamic Retirement Fund

BlackRock Funds IV

BlackRock Global Long/Short Credit Fund

BlackRock Sustainable Advantage CoreAlpha Bond Fund

BlackRock Systematic Multi-Strategy Fund

BlackRock Funds V

BlackRock Core Bond Portfolio

BlackRock Floating Rate Income Portfolio

BlackRock GNMA Portfolio

BlackRock High Yield Bond Portfolio

BlackRock Income Fund

BlackRock Inflation Protected Bond Portfolio

BlackRock Low Duration Bond Portfolio

BlackRock Strategic Income Opportunities Portfolio

BlackRock Sustainable Emerging Markets Bond Fund

BlackRock Sustainable Emerging Markets Flexible Bond Fund

BlackRock Sustainable High Yield Bond Fund

BlackRock Sustainable Low Duration Bond Fund

BlackRock U.S. Government Bond Portfolio

BlackRock Funds VI

BlackRock Advantage CoreAlpha Bond Fund

BlackRock Funds VII, Inc.

BlackRock Sustainable Emerging Markets Equity Fund

BlackRock Sustainable International Equity Fund

BlackRock Sustainable U.S. Growth Equity Fund

BlackRock Sustainable U.S. Value Equity Fund

BlackRock Global Allocation Fund, Inc.

BlackRock Large Cap Series Funds, Inc.

BlackRock Advantage Large Cap Core Fund

BlackRock Advantage Large Cap Value Fund

BlackRock Event Driven Equity Fund

BlackRock Multi-State Municipal Series Trust

BlackRock New York Municipal Opportunities Fund

BlackRock Municipal Bond Fund, Inc.

BlackRock High Yield Municipal Fund

BlackRock Impact Municipal Fund

BlackRock National Municipal Fund

BlackRock Short-Term Municipal Fund

BlackRock Municipal Series Trust

BlackRock Strategic Municipal Opportunities Fund

BlackRock Natural Resources Trust

BlackRock Series Fund, Inc.

BlackRock Advantage Large Cap Core Portfolio

BlackRock Global Allocation Portfolio

BlackRock Sustainable Balanced Portfolio

BlackRock Series Fund II, Inc.

BlackRock High Yield Portfolio

BlackRock U.S. Government Bond Portfolio

BlackRock Series, Inc.

BlackRock International Fund

BlackRock Strategic Global Bond Fund, Inc.

BlackRock Sustainable Balanced Fund, Inc.

BlackRock Unconstrained Equity Fund

BlackRock Variable Series Funds, Inc.

BlackRock Advantage Large Cap Core V.I. Fund

BlackRock Advantage Large Cap Value V.I. Fund

BlackRock Advantage SMID Cap V.I. Fund

BlackRock Global Allocation V.I. Fund

BlackRock International Index V.I. Fund

BlackRock International V.I. Fund

BlackRock Large Cap Focus Growth V.I. Fund

BlackRock Managed Volatility V.I. Fund

BlackRock S&P 500 Index V.I. Fund

BlackRock Small Cap Index V.I. Fund

BlackRock Variable Series Funds II, Inc.

BlackRock High Yield V.I. Fund

BlackRock Total Return V.I. Fund

BlackRock U.S. Government Bond V.I. Fund

Managed Account Series

BlackRock GA Disciplined Volatility Equity Fund

BlackRock GA Dynamic Equity Fund

Managed Account Series II

BlackRock U.S. Mortgage Portfolio

(each, a “Fund” and collectively, the “Funds”)

Supplement dated July 18, 2022 (the “Supplement”) to the

Summary Prospectus(es), Prospectus(es) and Statement of Additional Information (“SAI”) of each Fund, as supplemented to date

The following changes are made to each Fund’s Summary Prospectus(es) and Prospectus(es), as applicable:

The risk factor entitled “Leverage Risk” in the section of the Summary Prospectus(es) entitled “Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, and the section of the Prospectus(es) entitled “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund” or “Fund Overview—Key Facts About [the Fund]—Principal Risks of Investing in the Fund, the Underlying Funds and/or the ETFs,” as applicable, for each applicable Fund is deleted in its entirety and replaced with the following:

Leverage Risk — Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet the applicable requirements of the Investment Company Act of 1940, as amended (the “Investment Company Act”), and the rules thereunder. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage.