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Shareholder Report
 6 Months Ended
Nov. 30, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name BlackRock Funds
Entity Central Index Key 0000844779
Entity Investment Company Type N-1A
Document Period End Date Nov. 30, 2024
C000004036 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Mid-Cap Growth Equity Portfolio
Class Name Institutional Shares
Trading Symbol CMGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Mid-Cap Growth Equity Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $44 0.80%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.80% [1]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 17.79 % 29.31 % 10.09 % 12.75 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell Midcap® Growth Index 24.90 40.07 13.18 12.22
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,438,123,470
Holdings Count | Holding 69
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,438,123,470
Number of Portfolio Holdings 69
Portfolio Turnover Rate 38%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 28.4 %
Industrials 26.2 %
Consumer Discretionary 11.4 %
Financials 10.7 %
Health Care 9.9 %
Communication Services 9.2 %
Real Estate 2.1 %
Utilities 1.2 %
Materials 1.0 %
Short-Term Securities 3.8 %
Liabilities in Excess of Other Assets (3.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
(b)Excludes short-term securities.
C000004037 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Mid-Cap Growth Equity Portfolio
Class Name Service Shares
Trading Symbol CMGSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Mid-Cap Growth Equity Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Service Shares $57 1.05%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.05% [2]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Service Shares 17.62 % 28.98 % 9.81 % 12.46 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell Midcap® Growth Index 24.90 40.07 13.18 12.22
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,438,123,470
Holdings Count | Holding 69
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,438,123,470
Number of Portfolio Holdings 69
Portfolio Turnover Rate 38%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 28.4 %
Industrials 26.2 %
Consumer Discretionary 11.4 %
Financials 10.7 %
Health Care 9.9 %
Communication Services 9.2 %
Real Estate 2.1 %
Utilities 1.2 %
Materials 1.0 %
Short-Term Securities 3.8 %
Liabilities in Excess of Other Assets (3.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(b)Excludes short-term securities.
C000004038 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Mid-Cap Growth Equity Portfolio
Class Name Investor A Shares
Trading Symbol BMGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Mid-Cap Growth Equity Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $57 1.05%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.05% [3]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 17.65 % 29.00 % 9.81 % 12.45 %
Investor A Shares (with sales charge) 11.47 22.22 8.63 11.84
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell Midcap® Growth Index 24.90 40.07 13.18 12.22
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,438,123,470
Holdings Count | Holding 69
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,438,123,470
Number of Portfolio Holdings 69
Portfolio Turnover Rate 38%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 28.4 %
Industrials 26.2 %
Consumer Discretionary 11.4 %
Financials 10.7 %
Health Care 9.9 %
Communication Services 9.2 %
Real Estate 2.1 %
Utilities 1.2 %
Materials 1.0 %
Short-Term Securities 3.8 %
Liabilities in Excess of Other Assets (3.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(b)Excludes short-term securities.
C000004040 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Mid-Cap Growth Equity Portfolio
Class Name Investor C Shares
Trading Symbol BMGCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Mid-Cap Growth Equity Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $98 1.80%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 98
Expense Ratio, Percent 1.80% [4]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 17.20 % 28.02 % 9.00 % 11.79 %
Investor C Shares (with sales charge) 16.20 27.02 9.00 11.79
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell Midcap® Growth Index 24.90 40.07 13.18 12.22
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,438,123,470
Holdings Count | Holding 69
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,438,123,470
Number of Portfolio Holdings 69
Portfolio Turnover Rate 38%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 28.4 %
Industrials 26.2 %
Consumer Discretionary 11.4 %
Financials 10.7 %
Health Care 9.9 %
Communication Services 9.2 %
Real Estate 2.1 %
Utilities 1.2 %
Materials 1.0 %
Short-Term Securities 3.8 %
Liabilities in Excess of Other Assets (3.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
(b)Excludes short-term securities.
C000166016 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Mid-Cap Growth Equity Portfolio
Class Name Class K Shares
Trading Symbol BMGKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Mid-Cap Growth Equity Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $38 0.70%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.70% [5]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 17.83 % 29.46 % 10.19 % 12.84 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell Midcap® Growth Index 24.90 40.07 13.18 12.22
Performance Inception Date Mar. 28, 2016
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,438,123,470
Holdings Count | Holding 69
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,438,123,470
Number of Portfolio Holdings 69
Portfolio Turnover Rate 38%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 28.4 %
Industrials 26.2 %
Consumer Discretionary 11.4 %
Financials 10.7 %
Health Care 9.9 %
Communication Services 9.2 %
Real Estate 2.1 %
Utilities 1.2 %
Materials 1.0 %
Short-Term Securities 3.8 %
Liabilities in Excess of Other Assets (3.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
(b)Excludes short-term securities.
C000037625 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Mid-Cap Growth Equity Portfolio
Class Name Class R Shares
Trading Symbol BMRRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Mid-Cap Growth Equity Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class R Shares $71 1.30%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 71
Expense Ratio, Percent 1.30% [6]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class R Shares 17.50 % 28.68 % 9.54 % 12.16 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell Midcap® Growth Index 24.90 40.07 13.18 12.22
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,438,123,470
Holdings Count | Holding 69
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,438,123,470
Number of Portfolio Holdings 69
Portfolio Turnover Rate 38%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 28.4 %
Industrials 26.2 %
Consumer Discretionary 11.4 %
Financials 10.7 %
Health Care 9.9 %
Communication Services 9.2 %
Real Estate 2.1 %
Utilities 1.2 %
Materials 1.0 %
Short-Term Securities 3.8 %
Liabilities in Excess of Other Assets (3.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
AppLovin Corp., Class A 5.1 %
Axon Enterprise, Inc. 4.4 %
Vertiv Holdings Co., Class A 4.0 %
Ares Management Corp., Class A 3.1 %
Comfort Systems U.S.A., Inc. 2.7 %
Live Nation Entertainment, Inc. 2.6 %
HEICO Corp. 2.5 %
Saia, Inc. 2.5 %
Tradeweb Markets, Inc., Class A 2.5 %
TPG, Inc., Class A 2.3 %
(b)Excludes short-term securities.
C000004057 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock High Equity Income Fund
Class Name Institutional Shares
Trading Symbol BMCIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock High Equity Income Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $44 0.85%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.85% [7]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 6.42 % 18.56 % 9.31 % 8.04 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Value Index 14.05 29.56 10.84 9.32
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,023,457,783
Holdings Count | Holding 182
Investment Company Portfolio Turnover 54.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,023,457,783
Number of Portfolio Holdings 182
Portfolio Turnover Rate 54%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.9 %
Health Care 17.8 %
Industrials 13.1 %
Information Technology 9.8 %
Consumer Discretionary 7.7 %
Consumer Staples 7.6 %
Communication Services 7.2 %
Energy 5.4 %
Materials 5.3 %
Utilities 4.4 %
Real Estate 1.4 %
Short-Term Securities 2.9 %
Liabilities in Excess of Other Assets (1.5 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
(b)Excludes short-term securities.
C000004059 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock High Equity Income Fund
Class Name Investor A Shares
Trading Symbol BMEAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock High Equity Income Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $57 1.10%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.10% [8]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 6.29 % 18.28 % 9.04 % 7.74 %
Investor A Shares (with sales charge) 0.71 12.07 7.87 7.16
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Value Index 14.05 29.56 10.84 9.32
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,023,457,783
Holdings Count | Holding 182
Investment Company Portfolio Turnover 54.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,023,457,783
Number of Portfolio Holdings 182
Portfolio Turnover Rate 54%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.9 %
Health Care 17.8 %
Industrials 13.1 %
Information Technology 9.8 %
Consumer Discretionary 7.7 %
Consumer Staples 7.6 %
Communication Services 7.2 %
Energy 5.4 %
Materials 5.3 %
Utilities 4.4 %
Real Estate 1.4 %
Short-Term Securities 2.9 %
Liabilities in Excess of Other Assets (1.5 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
(b)Excludes short-term securities.
C000004061 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock High Equity Income Fund
Class Name Investor C Shares
Trading Symbol BMECX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock High Equity Income Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $95 1.85%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 95
Expense Ratio, Percent 1.85% [9]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 5.87 % 17.33 % 8.21 % 7.10 %
Investor C Shares (with sales charge) 4.87 16.33 8.21 7.10
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Value Index 14.05 29.56 10.84 9.32
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,023,457,783
Holdings Count | Holding 182
Investment Company Portfolio Turnover 54.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,023,457,783
Number of Portfolio Holdings 182
Portfolio Turnover Rate 54%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.9 %
Health Care 17.8 %
Industrials 13.1 %
Information Technology 9.8 %
Consumer Discretionary 7.7 %
Consumer Staples 7.6 %
Communication Services 7.2 %
Energy 5.4 %
Materials 5.3 %
Utilities 4.4 %
Real Estate 1.4 %
Short-Term Securities 2.9 %
Liabilities in Excess of Other Assets (1.5 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
(b)Excludes short-term securities.
C000219259 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock High Equity Income Fund
Class Name Class K Shares
Trading Symbol BHEIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock High Equity Income Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $41 0.80%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.80% [10]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 6.45 % 18.58 % 9.34 % 8.06 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Value Index 14.05 29.56 10.84 9.32
Performance Inception Date Apr. 21, 2020
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,023,457,783
Holdings Count | Holding 182
Investment Company Portfolio Turnover 54.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,023,457,783
Number of Portfolio Holdings 182
Portfolio Turnover Rate 54%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.9 %
Health Care 17.8 %
Industrials 13.1 %
Information Technology 9.8 %
Consumer Discretionary 7.7 %
Consumer Staples 7.6 %
Communication Services 7.2 %
Energy 5.4 %
Materials 5.3 %
Utilities 4.4 %
Real Estate 1.4 %
Short-Term Securities 2.9 %
Liabilities in Excess of Other Assets (1.5 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Wells Fargo & Co. 2.2 %
Cardinal Health, Inc. 2.2 %
Samsung Electronics Co. Ltd., Registered Shares, GDR 2.0 %
First Citizens BancShares, Inc., Class A 1.6 %
CVS Health Corp. 1.6 %
Barclays Capital, Inc. (Wells Fargo & Co.) 1.6 %
Citigroup, Inc. 1.5 %
SS&C Technologies Holdings, Inc. 1.5 %
Baxter International, Inc. 1.4 %
Comcast Corp., Class A 1.3 %
(b)Excludes short-term securities.
C000004062 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Technology Opportunities Fund
Class Name Institutional Shares
Trading Symbol BGSIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Technology Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $50 0.92%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.92% [11]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 15.75 % 41.43 % 19.42 % 19.97 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI All-Country World Information Technology 10/40 Index 12.85 35.23 19.87 18.32
MSCI All-Country World Information Technology Index 13.94 36.18 21.41 18.83
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 6,122,219,562
Holdings Count | Holding 76
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $6,122,219,562
Number of Portfolio Holdings 76
Portfolio Turnover Rate 28%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Software 31.1 %
Semiconductors & Semiconductor Equipment 29.2 %
Technology Hardware, Storage & Peripherals 8.3 %
Interactive Media & Services 5.4 %
Entertainment 4.4 %
Broadline Retail 4.3 %
IT Services 3.1 %
Automobiles 2.3 %
Financial Services 2.1 %
Professional Services 1.9 %
Other# 6.8 %
Short-Term Securities 2.0 %
Liabilities in Excess of Other Assets (0.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
​#
Ten largest industries are presented. Additional industries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
(b)Excludes short-term securities.
C000004063 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Technology Opportunities Fund
Class Name Service Shares
Trading Symbol BSTSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Technology Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Service Shares $63 1.17%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.17% [12]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Service Shares 15.62 % 41.07 % 19.13 % 19.69 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI All-Country World Information Technology 10/40 Index 12.85 35.23 19.87 18.32
MSCI All-Country World Information Technology Index 13.94 36.18 21.41 18.83
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 6,122,219,562
Holdings Count | Holding 76
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $6,122,219,562
Number of Portfolio Holdings 76
Portfolio Turnover Rate 28%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Software 31.1 %
Semiconductors & Semiconductor Equipment 29.2 %
Technology Hardware, Storage & Peripherals 8.3 %
Interactive Media & Services 5.4 %
Entertainment 4.4 %
Broadline Retail 4.3 %
IT Services 3.1 %
Automobiles 2.3 %
Financial Services 2.1 %
Professional Services 1.9 %
Other# 6.8 %
Short-Term Securities 2.0 %
Liabilities in Excess of Other Assets (0.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
​#
Ten largest industries are presented. Additional industries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
(b)Excludes short-term securities.
C000004064 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Technology Opportunities Fund
Class Name Investor A Shares
Trading Symbol BGSAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Technology Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $63 1.17%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.17% [13]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 15.62 % 41.08 % 19.13 % 19.66 %
Investor A Shares (with sales charge) 9.55 33.67 17.85 19.02
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI All-Country World Information Technology 10/40 Index 12.85 35.23 19.87 18.32
MSCI All-Country World Information Technology Index 13.94 36.18 21.41 18.83
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 6,122,219,562
Holdings Count | Holding 76
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $6,122,219,562
Number of Portfolio Holdings 76
Portfolio Turnover Rate 28%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Software 31.1 %
Semiconductors & Semiconductor Equipment 29.2 %
Technology Hardware, Storage & Peripherals 8.3 %
Interactive Media & Services 5.4 %
Entertainment 4.4 %
Broadline Retail 4.3 %
IT Services 3.1 %
Automobiles 2.3 %
Financial Services 2.1 %
Professional Services 1.9 %
Other# 6.8 %
Short-Term Securities 2.0 %
Liabilities in Excess of Other Assets (0.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
​#
Ten largest industries are presented. Additional industries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
(b)Excludes short-term securities.
C000004066 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Technology Opportunities Fund
Class Name Investor C Shares
Trading Symbol BGSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Technology Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $103 1.91%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 103
Expense Ratio, Percent 1.91% [14]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 15.22 % 40.02 % 18.24 % 18.94 %
Investor C Shares (with sales charge) 14.22 39.02 18.24 18.94
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI All-Country World Information Technology 10/40 Index 12.85 35.23 19.87 18.32
MSCI All-Country World Information Technology Index 13.94 36.18 21.41 18.83
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 6,122,219,562
Holdings Count | Holding 76
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $6,122,219,562
Number of Portfolio Holdings 76
Portfolio Turnover Rate 28%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Software 31.1 %
Semiconductors & Semiconductor Equipment 29.2 %
Technology Hardware, Storage & Peripherals 8.3 %
Interactive Media & Services 5.4 %
Entertainment 4.4 %
Broadline Retail 4.3 %
IT Services 3.1 %
Automobiles 2.3 %
Financial Services 2.1 %
Professional Services 1.9 %
Other# 6.8 %
Short-Term Securities 2.0 %
Liabilities in Excess of Other Assets (0.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
​#
Ten largest industries are presented. Additional industries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
(b)Excludes short-term securities.
C000216612 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Technology Opportunities Fund
Class Name Class K Shares
Trading Symbol BTEKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Technology Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $45 0.83%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.83% [15]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 15.81 % 41.54 % 19.51 % 20.02 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI All-Country World Information Technology 10/40 Index 12.85 35.23 19.87 18.32
MSCI All-Country World Information Technology Index 13.94 36.18 21.41 18.83
Performance Inception Date Dec. 10, 2019
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 6,122,219,562
Holdings Count | Holding 76
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $6,122,219,562
Number of Portfolio Holdings 76
Portfolio Turnover Rate 28%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Software 31.1 %
Semiconductors & Semiconductor Equipment 29.2 %
Technology Hardware, Storage & Peripherals 8.3 %
Interactive Media & Services 5.4 %
Entertainment 4.4 %
Broadline Retail 4.3 %
IT Services 3.1 %
Automobiles 2.3 %
Financial Services 2.1 %
Professional Services 1.9 %
Other# 6.8 %
Short-Term Securities 2.0 %
Liabilities in Excess of Other Assets (0.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
​#
Ten largest industries are presented. Additional industries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
(b)Excludes short-term securities.
C000037630 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Technology Opportunities Fund
Class Name Class R Shares
Trading Symbol BGSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Technology Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class R Shares $77 1.42%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 77
Expense Ratio, Percent 1.42% [16]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class R Shares 15.48 % 40.73 % 18.83 % 19.35 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI All-Country World Information Technology 10/40 Index 12.85 35.23 19.87 18.32
MSCI All-Country World Information Technology Index 13.94 36.18 21.41 18.83
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 6,122,219,562
Holdings Count | Holding 76
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $6,122,219,562
Number of Portfolio Holdings 76
Portfolio Turnover Rate 28%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Software 31.1 %
Semiconductors & Semiconductor Equipment 29.2 %
Technology Hardware, Storage & Peripherals 8.3 %
Interactive Media & Services 5.4 %
Entertainment 4.4 %
Broadline Retail 4.3 %
IT Services 3.1 %
Automobiles 2.3 %
Financial Services 2.1 %
Professional Services 1.9 %
Other# 6.8 %
Short-Term Securities 2.0 %
Liabilities in Excess of Other Assets (0.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
​#
Ten largest industries are presented. Additional industries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 15.1 %
Microsoft Corp. 8.4 %
Apple Inc. 7.8 %
Broadcom, Inc. 4.4 %
Meta Platforms, Inc., Class A 3.6 %
Cadence Design Systems, Inc. 3.3 %
Oracle Corp. 2.8 %
Amazon.com, Inc. 2.6 %
Tesla, Inc. 2.3 %
Fair Isaac Corp. 2.2 %
(b)Excludes short-term securities.
C000004873 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Energy Opportunities Fund
Class Name Institutional Shares
Trading Symbol BACIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Energy Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $46 0.91%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.91% [17]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 0.51 % 11.01 % 12.20 % 3.42 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI World Energy Index 0.72 11.17 10.99 4.29
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 324,881,370
Holdings Count | Holding 30
Investment Company Portfolio Turnover 23.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $324,881,370
Number of Portfolio Holdings 30
Portfolio Turnover Rate 23%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Oil, Gas & Consumable Fuels 90.9 %
Energy Equipment & Services 6.7 %
Short-Term Securities 2.2 %
Other Assets Less Liabilities 0.2 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 20.0 %
Shell PLC 9.9 %
TotalEnergies SE 6.4 %
ConocoPhillips 5.4 %
Williams Cos., Inc. (The) 4.8 %
Targa Resources Corp. 4.5 %
EOG Resources, Inc. 4.0 %
Cheniere Energy, Inc. 3.9 %
Chevron Corp. 3.8 %
Canadian Natural Resources Ltd. 3.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 20.0 %
Shell PLC 9.9 %
TotalEnergies SE 6.4 %
ConocoPhillips 5.4 %
Williams Cos., Inc. (The) 4.8 %
Targa Resources Corp. 4.5 %
EOG Resources, Inc. 4.0 %
Cheniere Energy, Inc. 3.9 %
Chevron Corp. 3.8 %
Canadian Natural Resources Ltd. 3.5 %
(b)Excludes short-term securities.
C000004875 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Energy Opportunities Fund
Class Name Investor A Shares
Trading Symbol BACAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Energy Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $65 1.29%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.29% [18]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 0.35 % 10.67 % 11.74 % 3.00 %
Investor A Shares (with sales charge) (4.92 ) 4.86 10.54 2.44
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI World Energy Index 0.72 11.17 10.99 4.29
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 324,881,370
Holdings Count | Holding 30
Investment Company Portfolio Turnover 23.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $324,881,370
Number of Portfolio Holdings 30
Portfolio Turnover Rate 23%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Oil, Gas & Consumable Fuels 90.9 %
Energy Equipment & Services 6.7 %
Short-Term Securities 2.2 %
Other Assets Less Liabilities 0.2 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 20.0 %
Shell PLC 9.9 %
TotalEnergies SE 6.4 %
ConocoPhillips 5.4 %
Williams Cos., Inc. (The) 4.8 %
Targa Resources Corp. 4.5 %
EOG Resources, Inc. 4.0 %
Cheniere Energy, Inc. 3.9 %
Chevron Corp. 3.8 %
Canadian Natural Resources Ltd. 3.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 20.0 %
Shell PLC 9.9 %
TotalEnergies SE 6.4 %
ConocoPhillips 5.4 %
Williams Cos., Inc. (The) 4.8 %
Targa Resources Corp. 4.5 %
EOG Resources, Inc. 4.0 %
Cheniere Energy, Inc. 3.9 %
Chevron Corp. 3.8 %
Canadian Natural Resources Ltd. 3.5 %
(b)Excludes short-term securities.
C000004877 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Energy Opportunities Fund
Class Name Investor C Shares
Trading Symbol BACCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Energy Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $100 2.00%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 100
Expense Ratio, Percent 2.00% [19]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares (0.08 )% 9.86 % 10.93 % 2.40 %
Investor C Shares (with sales charge) (1.08 ) 8.86 10.93 2.40
MSCI All Country World Index 10.53 26.12 11.36 9.28
MSCI World Energy Index 0.72 11.17 10.99 4.29
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 324,881,370
Holdings Count | Holding 30
Investment Company Portfolio Turnover 23.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $324,881,370
Number of Portfolio Holdings 30
Portfolio Turnover Rate 23%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Oil, Gas & Consumable Fuels 90.9 %
Energy Equipment & Services 6.7 %
Short-Term Securities 2.2 %
Other Assets Less Liabilities 0.2 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 20.0 %
Shell PLC 9.9 %
TotalEnergies SE 6.4 %
ConocoPhillips 5.4 %
Williams Cos., Inc. (The) 4.8 %
Targa Resources Corp. 4.5 %
EOG Resources, Inc. 4.0 %
Cheniere Energy, Inc. 3.9 %
Chevron Corp. 3.8 %
Canadian Natural Resources Ltd. 3.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 20.0 %
Shell PLC 9.9 %
TotalEnergies SE 6.4 %
ConocoPhillips 5.4 %
Williams Cos., Inc. (The) 4.8 %
Targa Resources Corp. 4.5 %
EOG Resources, Inc. 4.0 %
Cheniere Energy, Inc. 3.9 %
Chevron Corp. 3.8 %
Canadian Natural Resources Ltd. 3.5 %
(b)Excludes short-term securities.
C000004883 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Large Cap Growth Fund
Class Name Institutional Shares
Trading Symbol CMVIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Growth Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $34 0.62%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.62% [20]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 17.30 % 38.10 % 17.73 % 14.86 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Growth Index 16.90 38.04 19.46 16.55
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,393,467,152
Holdings Count | Holding 124
Investment Company Portfolio Turnover 79.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,393,467,152
Number of Portfolio Holdings 124
Portfolio Turnover Rate 79%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 47.8 %
Consumer Discretionary 13.4 %
Communication Services 12.2 %
Financials 7.6 %
Health Care 7.4 %
Industrials 7.1 %
Consumer Staples 3.3 %
Real Estate 0.3 %
Short-Term Securities 0.9 %
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
(b)Excludes short-term securities.
C000004885 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Large Cap Growth Fund
Class Name Investor A Shares
Trading Symbol BMCAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Growth Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $47 0.87%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.87% [21]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 17.16 % 37.74 % 17.42 % 14.55 %
Investor A Shares (with sales charge) 11.01 30.51 16.16 13.94
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Growth Index 16.90 38.04 19.46 16.55
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,393,467,152
Holdings Count | Holding 124
Investment Company Portfolio Turnover 79.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,393,467,152
Number of Portfolio Holdings 124
Portfolio Turnover Rate 79%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 47.8 %
Consumer Discretionary 13.4 %
Communication Services 12.2 %
Financials 7.6 %
Health Care 7.4 %
Industrials 7.1 %
Consumer Staples 3.3 %
Real Estate 0.3 %
Short-Term Securities 0.9 %
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
(b)Excludes short-term securities.
C000004887 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Large Cap Growth Fund
Class Name Investor C Shares
Trading Symbol BMCCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Growth Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $88 1.62%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 88
Expense Ratio, Percent 1.62% [22]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 16.70 % 36.67 % 16.54 % 13.85 %
Investor C Shares (with sales charge) 15.70 35.67 16.54 13.85
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Growth Index 16.90 38.04 19.46 16.55
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,393,467,152
Holdings Count | Holding 124
Investment Company Portfolio Turnover 79.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,393,467,152
Number of Portfolio Holdings 124
Portfolio Turnover Rate 79%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 47.8 %
Consumer Discretionary 13.4 %
Communication Services 12.2 %
Financials 7.6 %
Health Care 7.4 %
Industrials 7.1 %
Consumer Staples 3.3 %
Real Estate 0.3 %
Short-Term Securities 0.9 %
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
(b)Excludes short-term securities.
C000198239 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Large Cap Growth Fund
Class Name Class K Shares
Trading Symbol BMCKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Growth Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $31 0.57%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.57% [23]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 17.32 % 38.10 % 17.77 % 14.79 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Growth Index 16.90 38.04 19.46 16.55
Performance Inception Date Jan. 25, 2018
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,393,467,152
Holdings Count | Holding 124
Investment Company Portfolio Turnover 79.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,393,467,152
Number of Portfolio Holdings 124
Portfolio Turnover Rate 79%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 47.8 %
Consumer Discretionary 13.4 %
Communication Services 12.2 %
Financials 7.6 %
Health Care 7.4 %
Industrials 7.1 %
Consumer Staples 3.3 %
Real Estate 0.3 %
Short-Term Securities 0.9 %
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
(b)Excludes short-term securities.
C000037656 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Large Cap Growth Fund
Class Name Class R Shares
Trading Symbol BMCRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Growth Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class R Shares $61 1.12%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.12% [24]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class R Shares 17.00 % 37.42 % 17.14 % 14.24 %
Russell 1000® Index 15.83 34.40 15.58 13.16
Russell 1000® Growth Index 16.90 38.04 19.46 16.55
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 1,393,467,152
Holdings Count | Holding 124
Investment Company Portfolio Turnover 79.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $1,393,467,152
Number of Portfolio Holdings 124
Portfolio Turnover Rate 79%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Information Technology 47.8 %
Consumer Discretionary 13.4 %
Communication Services 12.2 %
Financials 7.6 %
Health Care 7.4 %
Industrials 7.1 %
Consumer Staples 3.3 %
Real Estate 0.3 %
Short-Term Securities 0.9 %
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
NVIDIA Corp. 10.3 %
Apple Inc. 8.4 %
Microsoft Corp. 5.8 %
Amazon.com, Inc. 5.0 %
Meta Platforms, Inc., Class A 4.9 %
Tesla, Inc. 3.1 %
Alphabet, Inc., Class C, NVS 2.8 %
Broadcom, Inc. 2.7 %
Eli Lilly & Co. 2.7 %
Costco Wholesale Corp. 2.5 %
(b)Excludes short-term securities.
C000004912 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Health Sciences Opportunities Portfolio
Class Name Institutional Shares
Trading Symbol SHSSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Health Sciences Opportunities Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $42 0.83%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.83% [25]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 3.83 % 15.94 % 8.58 % 9.97 %
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 3000® Health Care Index 4.73 16.21 9.28 9.43
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 8,020,693,616
Holdings Count | Holding 140
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $8,020,693,616
Number of Portfolio Holdings 140
Portfolio Turnover Rate 16%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Health Care Equipment & Supplies 27.7 %
Biotechnology 26.6 %
Pharmaceuticals 17.8 %
Health Care Providers & Services 17.5 %
Life Sciences Tools & Services 8.9 %
Financial Services 0.1 %
Software 0.1 %
Short-Term Securities 2.5 %
Liabilities in Excess of Other Assets (1.2 )%
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
(b)Excludes short-term securities.
C000004913 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Health Sciences Opportunities Portfolio
Class Name Service Shares
Trading Symbol SHISX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Health Sciences Opportunities Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Service Shares $59 1.15%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.15% [26]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Service Shares 3.66 % 15.58 % 8.25 % 9.64 %
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 3000® Health Care Index 4.73 16.21 9.28 9.43
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 8,020,693,616
Holdings Count | Holding 140
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $8,020,693,616
Number of Portfolio Holdings 140
Portfolio Turnover Rate 16%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Health Care Equipment & Supplies 27.7 %
Biotechnology 26.6 %
Pharmaceuticals 17.8 %
Health Care Providers & Services 17.5 %
Life Sciences Tools & Services 8.9 %
Financial Services 0.1 %
Software 0.1 %
Short-Term Securities 2.5 %
Liabilities in Excess of Other Assets (1.2 )%
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
(b)Excludes short-term securities.
C000004914 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Health Sciences Opportunities Portfolio
Class Name Investor A Shares
Trading Symbol SHSAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Health Sciences Opportunities Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $55 1.08%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.08% [27]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 3.69 % 15.64 % 8.30 % 9.67 %
Investor A Shares (with sales charge) (1.75 ) 9.56 7.14 9.09
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 3000® Health Care Index 4.73 16.21 9.28 9.43
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 8,020,693,616
Holdings Count | Holding 140
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $8,020,693,616
Number of Portfolio Holdings 140
Portfolio Turnover Rate 16%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Health Care Equipment & Supplies 27.7 %
Biotechnology 26.6 %
Pharmaceuticals 17.8 %
Health Care Providers & Services 17.5 %
Life Sciences Tools & Services 8.9 %
Financial Services 0.1 %
Software 0.1 %
Short-Term Securities 2.5 %
Liabilities in Excess of Other Assets (1.2 )%
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
(b)Excludes short-term securities.
C000004916 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Health Sciences Opportunities Portfolio
Class Name Investor C Shares
Trading Symbol SHSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Health Sciences Opportunities Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $94 1.84%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 94
Expense Ratio, Percent 1.84% [28]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 3.32 % 14.77 % 7.50 % 9.03 %
Investor C Shares (with sales charge) 2.33 13.77 7.50 9.03
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 3000® Health Care Index 4.73 16.21 9.28 9.43
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 8,020,693,616
Holdings Count | Holding 140
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $8,020,693,616
Number of Portfolio Holdings 140
Portfolio Turnover Rate 16%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Health Care Equipment & Supplies 27.7 %
Biotechnology 26.6 %
Pharmaceuticals 17.8 %
Health Care Providers & Services 17.5 %
Life Sciences Tools & Services 8.9 %
Financial Services 0.1 %
Software 0.1 %
Short-Term Securities 2.5 %
Liabilities in Excess of Other Assets (1.2 )%
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
(b)Excludes short-term securities.
C000172900 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Health Sciences Opportunities Portfolio
Class Name Class K Shares
Trading Symbol SHSKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Health Sciences Opportunities Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $38 0.74%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.74% [29]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 3.87 % 16.05 % 8.69 % 10.01 %
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 3000® Health Care Index 4.73 16.21 9.28 9.43
Performance Inception Date Jun. 08, 2016
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 8,020,693,616
Holdings Count | Holding 140
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $8,020,693,616
Number of Portfolio Holdings 140
Portfolio Turnover Rate 16%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Health Care Equipment & Supplies 27.7 %
Biotechnology 26.6 %
Pharmaceuticals 17.8 %
Health Care Providers & Services 17.5 %
Life Sciences Tools & Services 8.9 %
Financial Services 0.1 %
Software 0.1 %
Short-Term Securities 2.5 %
Liabilities in Excess of Other Assets (1.2 )%
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
(b)Excludes short-term securities.
C000037661 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Health Sciences Opportunities Portfolio
Class Name Class R Shares
Trading Symbol BHSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Health Sciences Opportunities Portfolio (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class R Shares $73 1.44%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.44% [30]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class R Shares 3.50 % 15.23 % 7.92 % 9.30 %
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 3000® Health Care Index 4.73 16.21 9.28 9.43
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 8,020,693,616
Holdings Count | Holding 140
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $8,020,693,616
Number of Portfolio Holdings 140
Portfolio Turnover Rate 16%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Industry allocation
Industry(a) Percent of
Net Assets
Health Care Equipment & Supplies 27.7 %
Biotechnology 26.6 %
Pharmaceuticals 17.8 %
Health Care Providers & Services 17.5 %
Life Sciences Tools & Services 8.9 %
Financial Services 0.1 %
Software 0.1 %
Short-Term Securities 2.5 %
Liabilities in Excess of Other Assets (1.2 )%
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
​(a)
For purposes of this report, industry sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
UnitedHealth Group, Inc. 9.0 %
Eli Lilly & Co. 8.8 %
Boston Scientific Corp. 6.9 %
Intuitive Surgical, Inc. 4.9 %
AbbVie, Inc. 4.3 %
Abbott Laboratories 3.8 %
Stryker Corp. 3.3 %
Danaher Corp. 3.2 %
Thermo Fisher Scientific, Inc. 2.8 %
Amgen, Inc. 2.5 %
(b)Excludes short-term securities.
C000023028 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage International Fund
Class Name Institutional Shares
Trading Symbol BROIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage International Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $25 0.50%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50% [31]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 0.60 % 14.41 % 7.09 % 6.00 %
MSCI EAFE Index (0.77 ) 11.88 5.89 5.07
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,293,754,305
Holdings Count | Holding 317
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,293,754,305
Number of Portfolio Holdings 317
Portfolio Turnover Rate 56%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Geographic allocation
Country Percent of
Net Assets
Japan 23.3 %
United Kingdom 13.6 %
Germany 10.1 %
Switzerland 7.8 %
France 7.7 %
Australia 6.7 %
United States 5.8 %
Netherlands 3.7 %
Denmark 2.7 %
Italy 2.5 %
Other# 12.2 %
Short-Term Securities 2.8 %
Other Assets Less Liabilities 1.1 %
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
​(a)
Excludes short-term securities.
​#
Ten largest countries are presented. Additional countries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
(a)Excludes short-term securities.
C000023030 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage International Fund
Class Name Investor A Shares
Trading Symbol BROAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage International Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $38 0.75%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [32]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 0.46 % 14.15 % 6.83 % 5.73 %
Investor A Shares (with sales charge) (4.82 ) 8.16 5.68 5.16
MSCI EAFE Index (0.77 ) 11.88 5.89 5.07
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,293,754,305
Holdings Count | Holding 317
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,293,754,305
Number of Portfolio Holdings 317
Portfolio Turnover Rate 56%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Geographic allocation
Country Percent of
Net Assets
Japan 23.3 %
United Kingdom 13.6 %
Germany 10.1 %
Switzerland 7.8 %
France 7.7 %
Australia 6.7 %
United States 5.8 %
Netherlands 3.7 %
Denmark 2.7 %
Italy 2.5 %
Other# 12.2 %
Short-Term Securities 2.8 %
Other Assets Less Liabilities 1.1 %
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
​(a)
Excludes short-term securities.
​#
Ten largest countries are presented. Additional countries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
(a)Excludes short-term securities.
C000023032 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage International Fund
Class Name Investor C Shares
Trading Symbol BROCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage International Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $75 1.50%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 75
Expense Ratio, Percent 1.50% [33]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 0.08 % 13.23 % 6.02 % 5.09 %
Investor C Shares (with sales charge) (0.91 ) 12.23 6.02 5.09
MSCI EAFE Index (0.77 ) 11.88 5.89 5.07
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,293,754,305
Holdings Count | Holding 317
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,293,754,305
Number of Portfolio Holdings 317
Portfolio Turnover Rate 56%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Geographic allocation
Country Percent of
Net Assets
Japan 23.3 %
United Kingdom 13.6 %
Germany 10.1 %
Switzerland 7.8 %
France 7.7 %
Australia 6.7 %
United States 5.8 %
Netherlands 3.7 %
Denmark 2.7 %
Italy 2.5 %
Other# 12.2 %
Short-Term Securities 2.8 %
Other Assets Less Liabilities 1.1 %
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
(a)
Excludes short-term securities.
​#
Ten largest countries are presented. Additional countries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
(a)Excludes short-term securities.
C000198216 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage International Fund
Class Name Class K Shares
Trading Symbol BROKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage International Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $23 0.45%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45% [34]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 0.62 % 14.46 % 7.13 % 6.04 %
MSCI EAFE Index (0.77 ) 11.88 5.89 5.07
Performance Inception Date Jan. 25, 2018
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,293,754,305
Holdings Count | Holding 317
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,293,754,305
Number of Portfolio Holdings 317
Portfolio Turnover Rate 56%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Geographic allocation
Country Percent of
Net Assets
Japan 23.3 %
United Kingdom 13.6 %
Germany 10.1 %
Switzerland 7.8 %
France 7.7 %
Australia 6.7 %
United States 5.8 %
Netherlands 3.7 %
Denmark 2.7 %
Italy 2.5 %
Other# 12.2 %
Short-Term Securities 2.8 %
Other Assets Less Liabilities 1.1 %
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
​(a)
Excludes short-term securities.
​#
Ten largest countries are presented. Additional countries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
(a)Excludes short-term securities.
C000037670 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage International Fund
Class Name Class R Shares
Trading Symbol BGORX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage International Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class R Shares $50 1.00%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 50
Expense Ratio, Percent 1.00% [35]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class R Shares 0.37 % 13.86 % 6.55 % 5.43 %
MSCI EAFE Index (0.77 ) 11.88 5.89 5.07
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 2,293,754,305
Holdings Count | Holding 317
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $2,293,754,305
Number of Portfolio Holdings 317
Portfolio Turnover Rate 56%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Geographic allocation
Country Percent of
Net Assets
Japan 23.3 %
United Kingdom 13.6 %
Germany 10.1 %
Switzerland 7.8 %
France 7.7 %
Australia 6.7 %
United States 5.8 %
Netherlands 3.7 %
Denmark 2.7 %
Italy 2.5 %
Other# 12.2 %
Short-Term Securities 2.8 %
Other Assets Less Liabilities 1.1 %
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
​(a)
Excludes short-term securities.
​#
Ten largest countries are presented. Additional countries are found in Other.
Largest Holdings [Text Block]
Ten largest holdings
Security(a) Percent of
Net Assets
SAP SE 2.5 %
Novartis AG, Registered Shares 2.3 %
Roche Holding AG, NVS 2.2 %
Shell PLC 2.0 %
Novo Nordisk A/S, Class B 1.9 %
Deutsche Telekom AG, Registered Shares 1.7 %
Sony Group Corp. 1.7 %
Recruit Holdings Co. Ltd. 1.6 %
BHP Group Ltd. 1.5 %
ASML Holding NV 1.5 %
(a)Excludes short-term securities.
C000103252 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Commodity Strategies Fund
Class Name Institutional Shares
Trading Symbol BICSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Commodity Strategies Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $36 0.72%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.72% [36]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 0.32 % 7.33 % 9.79 % 3.31 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
Bloomberg Commodity Index Total ReturnSM (2.31 ) 1.51 7.60 0.38
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 633,298,869
Holdings Count | Holding 196
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $633,298,869
Number of Portfolio Holdings 196
Portfolio Turnover Rate 37%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Materials 24.7 %
Energy 14.5 %
Consumer Staples 3.4 %
Industrials 3.1 %
Health Care 1.6 %
Consumer Discretionary 1.4 %
Short-Term Securities 51.3 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
(b)Excludes short-term securities.
C000103250 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Commodity Strategies Fund
Class Name Investor A Shares
Trading Symbol BCSAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Commodity Strategies Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $49 0.97%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.97% [37]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 0.10 % 7.00 % 9.50 % 3.06 %
Investor A Shares (with sales charge) (5.15 ) 1.38 8.33 2.51
MSCI All Country World Index 10.53 26.12 11.36 9.28
Bloomberg Commodity Index Total ReturnSM (2.31 ) 1.51 7.60 0.38
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 633,298,869
Holdings Count | Holding 196
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $633,298,869
Number of Portfolio Holdings 196
Portfolio Turnover Rate 37%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Materials 24.7 %
Energy 14.5 %
Consumer Staples 3.4 %
Industrials 3.1 %
Health Care 1.6 %
Consumer Discretionary 1.4 %
Short-Term Securities 51.3 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
(b)Excludes short-term securities.
C000103251 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Commodity Strategies Fund
Class Name Investor C Shares
Trading Symbol BCSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Commodity Strategies Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $86 1.72%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 86
Expense Ratio, Percent 1.72% [38]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares (0.23 )% 6.31 % 8.68 % 2.44 %
Investor C Shares (with sales charge) (1.21 ) 5.31 8.68 2.44
MSCI All Country World Index 10.53 26.12 11.36 9.28
Bloomberg Commodity Index Total ReturnSM (2.31 ) 1.51 7.60 0.38
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 633,298,869
Holdings Count | Holding 196
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $633,298,869
Number of Portfolio Holdings 196
Portfolio Turnover Rate 37%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Materials 24.7 %
Energy 14.5 %
Consumer Staples 3.4 %
Industrials 3.1 %
Health Care 1.6 %
Consumer Discretionary 1.4 %
Short-Term Securities 51.3 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
​(b)Excludes short-term securities.
C000198241 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Commodity Strategies Fund
Class Name Class K Shares
Trading Symbol BCSKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Commodity Strategies Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $34 0.67%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.67% [39]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 0.23 % 7.39 % 9.81 % 3.35 %
MSCI All Country World Index 10.53 26.12 11.36 9.28
Bloomberg Commodity Index Total ReturnSM (2.31 ) 1.51 7.60 0.38
Performance Inception Date Jan. 25, 2018
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 633,298,869
Holdings Count | Holding 196
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $633,298,869
Number of Portfolio Holdings 196
Portfolio Turnover Rate 37%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Materials 24.7 %
Energy 14.5 %
Consumer Staples 3.4 %
Industrials 3.1 %
Health Care 1.6 %
Consumer Discretionary 1.4 %
Short-Term Securities 51.3 %
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Exxon Mobil Corp. 2.9 %
Agnico Eagle Mines Ltd. 1.5 %
Shell PLC 1.5 %
Wheaton Precious Metals Corp. 1.2 %
Kinross Gold Corp. 1.1 %
Barrick Gold Corp. 1.0 %
TotalEnergies SE 0.9 %
Compass Group PLC 0.9 %
Rio Tinto PLC 0.9 %
Graphic Packaging Holding Co. 0.8 %
(b)Excludes short-term securities.
C000124019 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Small Cap Core Fund
Class Name Institutional Shares
Trading Symbol BDSIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Small Cap Core Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762.
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $27 0.50%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.50% [40]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Institutional Shares 15.67 % 36.10 % 9.76 % 9.93 %
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 2000® Index 18.40 36.43 9.90 9.05
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 4,470,664,678
Holdings Count | Holding 807
Investment Company Portfolio Turnover 44.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $4,470,664,678
Number of Portfolio Holdings 807
Portfolio Turnover Rate 44%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.5 %
Industrials 18.0 %
Health Care 17.3 %
Information Technology 13.5 %
Consumer Discretionary 10.7 %
Real Estate 5.7 %
Energy 4.4 %
Materials 3.7 %
Communication Services 3.3 %
Consumer Staples 2.0 %
Utilities 2.0 %
Short-Term Securities 3.3 %
Liabilities in Excess of Other Assets (2.4 )%
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
(b)Excludes short-term securities.
C000124020 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Small Cap Core Fund
Class Name Investor A Shares
Trading Symbol BDSAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Small Cap Core Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $41 0.75%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.75% [41]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor A Shares 15.49 % 35.78 % 9.48 % 9.65 %
Investor A Shares (with sales charge) 9.43 28.65 8.31 9.06
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 2000® Index 18.40 36.43 9.90 9.05
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 4,470,664,678
Holdings Count | Holding 807
Investment Company Portfolio Turnover 44.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $4,470,664,678
Number of Portfolio Holdings 807
Portfolio Turnover Rate 44%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.5 %
Industrials 18.0 %
Health Care 17.3 %
Information Technology 13.5 %
Consumer Discretionary 10.7 %
Real Estate 5.7 %
Energy 4.4 %
Materials 3.7 %
Communication Services 3.3 %
Consumer Staples 2.0 %
Utilities 2.0 %
Short-Term Securities 3.3 %
Liabilities in Excess of Other Assets (2.4 )%
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
(b)Excludes short-term securities.
C000124021 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Small Cap Core Fund
Class Name Investor C Shares
Trading Symbol BDSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Small Cap Core Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor C Shares $81 1.50%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 81
Expense Ratio, Percent 1.50% [42]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Investor C Shares 15.02 % 34.72 % 8.66 % 8.98 %
Investor C Shares (with sales charge) 14.02 33.72 8.66 8.98
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 2000® Index 18.40 36.43 9.90 9.05
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 4,470,664,678
Holdings Count | Holding 807
Investment Company Portfolio Turnover 44.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $4,470,664,678
Number of Portfolio Holdings 807
Portfolio Turnover Rate 44%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.5 %
Industrials 18.0 %
Health Care 17.3 %
Information Technology 13.5 %
Consumer Discretionary 10.7 %
Real Estate 5.7 %
Energy 4.4 %
Materials 3.7 %
Communication Services 3.3 %
Consumer Staples 2.0 %
Utilities 2.0 %
Short-Term Securities 3.3 %
Liabilities in Excess of Other Assets (2.4 )%
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
(b)Excludes short-term securities.
C000166014 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Advantage Small Cap Core Fund
Class Name Class K Shares
Trading Symbol BDSKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Advantage Small Cap Core Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $24 0.45%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.45% [43]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year 5 Years 10 Years
Class K Shares 15.67 % 36.21 % 9.81 % 9.97 %
Russell 3000® Index 15.95 34.49 15.23 12.89
Russell 2000® Index 18.40 36.43 9.90 9.05
Performance Inception Date Mar. 28, 2016
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 4,470,664,678
Holdings Count | Holding 807
Investment Company Portfolio Turnover 44.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $4,470,664,678
Number of Portfolio Holdings 807
Portfolio Turnover Rate 44%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Financials 18.5 %
Industrials 18.0 %
Health Care 17.3 %
Information Technology 13.5 %
Consumer Discretionary 10.7 %
Real Estate 5.7 %
Energy 4.4 %
Materials 3.7 %
Communication Services 3.3 %
Consumer Staples 2.0 %
Utilities 2.0 %
Short-Term Securities 3.3 %
Liabilities in Excess of Other Assets (2.4 )%
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
ExlService Holdings, Inc. 1.0 %
ACI Worldwide, Inc. 1.0 %
Boise Cascade Co. 0.8 %
Kite Realty Group Trust 0.8 %
First Industrial Realty Trust, Inc. 0.8 %
Sprouts Farmers Market, Inc. 0.8 %
Flowserve Corp. 0.7 %
FTAI Aviation Ltd. 0.7 %
Comfort Systems U.S.A., Inc. 0.6 %
Enova International, Inc. 0.6 %
(b)Excludes short-term securities.
C000228505 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock SMID-Cap Growth Equity Fund
Class Name Institutional Shares
Trading Symbol BSMDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock SMID-Cap Growth Equity Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $46 0.85%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.85% [44]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Institutional Shares 14.98 % 26.95 % (8.95 )%
Russell 3000® Index 15.95 34.49 10.79
Russell 2500TM Growth Index 18.78 37.95 1.41
Performance Inception Date Jun. 29, 2021
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,395,528
Holdings Count | Holding 92
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,395,528
Number of Portfolio Holdings 92
Portfolio Turnover Rate 30%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Industrials 27.8 %
Information Technology 24.9 %
Consumer Discretionary 16.5 %
Health Care 11.1 %
Financials 8.3 %
Communication Services 6.3 %
Energy 3.6 %
Consumer Staples 1.3 %
Real Estate 0.2 %
Short-Term Securities 6.1 %
Liabilities in Excess of Other Assets (6.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Axon Enterprise, Inc. 3.3 %
Comfort Systems U.S.A., Inc. 3.2 %
Saia, Inc. 2.7 %
Vertiv Holdings Co., Class A 2.7 %
TPG, Inc., Class A 2.6 %
Texas Pacific Land Corp. 2.3 %
Tradeweb Markets, Inc., Class A 2.3 %
Live Nation Entertainment, Inc. 2.2 %
DraftKings, Inc., Class A 2.0 %
Planet Fitness, Inc., Class A 2.0 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Axon Enterprise, Inc. 3.3 %
Comfort Systems U.S.A., Inc. 3.2 %
Saia, Inc. 2.7 %
Vertiv Holdings Co., Class A 2.7 %
TPG, Inc., Class A 2.6 %
Texas Pacific Land Corp. 2.3 %
Tradeweb Markets, Inc., Class A 2.3 %
Live Nation Entertainment, Inc. 2.2 %
DraftKings, Inc., Class A 2.0 %
Planet Fitness, Inc., Class A 2.0 %
​(b)Excludes short-term securities.
C000228504 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock SMID-Cap Growth Equity Fund
Class Name Investor A Shares
Trading Symbol BSDAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock SMID-Cap Growth Equity Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $59 1.10%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.10% [45]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Investor A Shares 14.76 % 26.58 % (9.19 )%
Investor A Shares (with sales charge) 8.74 19.94 (10.61 )
Russell 3000® Index 15.95 34.49 10.79
Russell 2500TM Growth Index 18.78 37.95 1.41
Performance Inception Date Jun. 29, 2021
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,395,528
Holdings Count | Holding 92
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,395,528
Number of Portfolio Holdings 92
Portfolio Turnover Rate 30%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Industrials 27.8 %
Information Technology 24.9 %
Consumer Discretionary 16.5 %
Health Care 11.1 %
Financials 8.3 %
Communication Services 6.3 %
Energy 3.6 %
Consumer Staples 1.3 %
Real Estate 0.2 %
Short-Term Securities 6.1 %
Liabilities in Excess of Other Assets (6.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Axon Enterprise, Inc. 3.3 %
Comfort Systems U.S.A., Inc. 3.2 %
Saia, Inc. 2.7 %
Vertiv Holdings Co., Class A 2.7 %
TPG, Inc., Class A 2.6 %
Texas Pacific Land Corp. 2.3 %
Tradeweb Markets, Inc., Class A 2.3 %
Live Nation Entertainment, Inc. 2.2 %
DraftKings, Inc., Class A 2.0 %
Planet Fitness, Inc., Class A 2.0 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Axon Enterprise, Inc. 3.3 %
Comfort Systems U.S.A., Inc. 3.2 %
Saia, Inc. 2.7 %
Vertiv Holdings Co., Class A 2.7 %
TPG, Inc., Class A 2.6 %
Texas Pacific Land Corp. 2.3 %
Tradeweb Markets, Inc., Class A 2.3 %
Live Nation Entertainment, Inc. 2.2 %
DraftKings, Inc., Class A 2.0 %
Planet Fitness, Inc., Class A 2.0 %
(b)Excludes short-term securities.
C000228503 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock SMID-Cap Growth Equity Fund
Class Name Class K Shares
Trading Symbol BSDKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock SMID-Cap Growth Equity Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $40 0.75%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.75% [46]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Class K Shares 15.01 % 27.05 % (8.86 )%
Russell 3000® Index 15.95 34.49 10.79
Russell 2500TM Growth Index 18.78 37.95 1.41
Performance Inception Date Jun. 29, 2021
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,395,528
Holdings Count | Holding 92
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,395,528
Number of Portfolio Holdings 92
Portfolio Turnover Rate 30%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Industrials 27.8 %
Information Technology 24.9 %
Consumer Discretionary 16.5 %
Health Care 11.1 %
Financials 8.3 %
Communication Services 6.3 %
Energy 3.6 %
Consumer Staples 1.3 %
Real Estate 0.2 %
Short-Term Securities 6.1 %
Liabilities in Excess of Other Assets (6.1 )%
Ten largest holdings
Security(b) Percent of
Net Assets
Axon Enterprise, Inc. 3.3 %
Comfort Systems U.S.A., Inc. 3.2 %
Saia, Inc. 2.7 %
Vertiv Holdings Co., Class A 2.7 %
TPG, Inc., Class A 2.6 %
Texas Pacific Land Corp. 2.3 %
Tradeweb Markets, Inc., Class A 2.3 %
Live Nation Entertainment, Inc. 2.2 %
DraftKings, Inc., Class A 2.0 %
Planet Fitness, Inc., Class A 2.0 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
Axon Enterprise, Inc. 3.3 %
Comfort Systems U.S.A., Inc. 3.2 %
Saia, Inc. 2.7 %
Vertiv Holdings Co., Class A 2.7 %
TPG, Inc., Class A 2.6 %
Texas Pacific Land Corp. 2.3 %
Tradeweb Markets, Inc., Class A 2.3 %
Live Nation Entertainment, Inc. 2.2 %
DraftKings, Inc., Class A 2.0 %
Planet Fitness, Inc., Class A 2.0 %
(b)Excludes short-term securities.
C000230442 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Infrastructure Sustainable Opportunities Fund
Class Name Institutional Shares
Trading Symbol BINFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Infrastructure Sustainable Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $52 1.00%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 52
Expense Ratio, Percent 1.00% [47]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Institutional Shares 7.69 % 9.75 % 0.80 %
MSCI All Country World Index 10.53 26.12 8.12
FTSE Developed Core Infrastructure 50/50 Net Tax Index 12.00 20.58 6.16
Performance Inception Date Sep. 30, 2021
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 9,621,118
Holdings Count | Holding 39
Investment Company Portfolio Turnover 59.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $9,621,118
Number of Portfolio Holdings 39
Portfolio Turnover Rate 59%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Utilities 47.6 %
Industrials 32.6 %
Real Estate 13.0 %
Communication Services 4.3 %
Information Technology 1.8 %
Short-Term Securities 3.6 %
Liabilities in Excess of Other Assets (2.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
National Grid PLC 6.8 %
Canadian National Railway Co. 5.6 %
E.ON SE, Registered Shares 5.1 %
Exelon Corp. 5.0 %
CSX Corp. 4.9 %
SBA Communications Corp. 4.7 %
Consolidated Edison, Inc. 4.5 %
PG&E Corp. 4.3 %
United Utilities Group PLC 4.1 %
Enel SpA 3.7 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
National Grid PLC 6.8 %
Canadian National Railway Co. 5.6 %
E.ON SE, Registered Shares 5.1 %
Exelon Corp. 5.0 %
CSX Corp. 4.9 %
SBA Communications Corp. 4.7 %
Consolidated Edison, Inc. 4.5 %
PG&E Corp. 4.3 %
United Utilities Group PLC 4.1 %
Enel SpA 3.7 %
(b)Excludes short-term securities.
C000230441 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Infrastructure Sustainable Opportunities Fund
Class Name Investor A Shares
Trading Symbol BINAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Infrastructure Sustainable Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $65 1.25%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.25% [48]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Investor A Shares 7.58 % 9.51 % 0.57 %
Investor A Shares (with sales charge) 1.93 3.76 (1.13 )
MSCI All Country World Index 10.53 26.12 8.12
FTSE Developed Core Infrastructure 50/50 Net Tax Index 12.00 20.58 6.16
Performance Inception Date Sep. 30, 2021
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 9,621,118
Holdings Count | Holding 39
Investment Company Portfolio Turnover 59.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $9,621,118
Number of Portfolio Holdings 39
Portfolio Turnover Rate 59%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Utilities 47.6 %
Industrials 32.6 %
Real Estate 13.0 %
Communication Services 4.3 %
Information Technology 1.8 %
Short-Term Securities 3.6 %
Liabilities in Excess of Other Assets (2.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
National Grid PLC 6.8 %
Canadian National Railway Co. 5.6 %
E.ON SE, Registered Shares 5.1 %
Exelon Corp. 5.0 %
CSX Corp. 4.9 %
SBA Communications Corp. 4.7 %
Consolidated Edison, Inc. 4.5 %
PG&E Corp. 4.3 %
United Utilities Group PLC 4.1 %
Enel SpA 3.7 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
National Grid PLC 6.8 %
Canadian National Railway Co. 5.6 %
E.ON SE, Registered Shares 5.1 %
Exelon Corp. 5.0 %
CSX Corp. 4.9 %
SBA Communications Corp. 4.7 %
Consolidated Edison, Inc. 4.5 %
PG&E Corp. 4.3 %
United Utilities Group PLC 4.1 %
Enel SpA 3.7 %
(b)Excludes short-term securities.
C000230443 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock Infrastructure Sustainable Opportunities Fund
Class Name Class K Shares
Trading Symbol BINKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock Infrastructure Sustainable Opportunities Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $49 0.95%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.95% [49]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Class K Shares 7.58 % 9.67 % 0.84 %
MSCI All Country World Index 10.53 26.12 8.12
FTSE Developed Core Infrastructure 50/50 Net Tax Index 12.00 20.58 6.16
Performance Inception Date Sep. 30, 2021
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 9,621,118
Holdings Count | Holding 39
Investment Company Portfolio Turnover 59.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $9,621,118
Number of Portfolio Holdings 39
Portfolio Turnover Rate 59%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Sector(a) Percent of
Net Assets
Utilities 47.6 %
Industrials 32.6 %
Real Estate 13.0 %
Communication Services 4.3 %
Information Technology 1.8 %
Short-Term Securities 3.6 %
Liabilities in Excess of Other Assets (2.9 )%
Ten largest holdings
Security(b) Percent of
Net Assets
National Grid PLC 6.8 %
Canadian National Railway Co. 5.6 %
E.ON SE, Registered Shares 5.1 %
Exelon Corp. 5.0 %
CSX Corp. 4.9 %
SBA Communications Corp. 4.7 %
Consolidated Edison, Inc. 4.5 %
PG&E Corp. 4.3 %
United Utilities Group PLC 4.1 %
Enel SpA 3.7 %
​(a)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
​(b)
Excludes short-term securities.
Largest Holdings [Text Block]
Ten largest holdings
Security(b) Percent of
Net Assets
National Grid PLC 6.8 %
Canadian National Railway Co. 5.6 %
E.ON SE, Registered Shares 5.1 %
Exelon Corp. 5.0 %
CSX Corp. 4.9 %
SBA Communications Corp. 4.7 %
Consolidated Edison, Inc. 4.5 %
PG&E Corp. 4.3 %
United Utilities Group PLC 4.1 %
Enel SpA 3.7 %
​(b)Excludes short-term securities.
C000242845 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock U.S. Insights Long/Short Equity Fund
Class Name Institutional Shares
Trading Symbol BILSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock U.S. Insights Long/Short Equity Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Institutional Shares $82 1.61%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 82
Expense Ratio, Percent 1.61% [50]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Institutional Shares (4.23 )% 4.64 % 11.02 %
S&P 500® Index 15.07 33.89 26.48
50% S&P 500 Index/50% ICE BofA 3-Month U.S. Treasury Bill Index 8.70 18.95 15.68
Performance Inception Date Jun. 13, 2023
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,855,118
Holdings Count | Holding 378
Investment Company Portfolio Turnover 69.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,855,118
Number of Portfolio Holdings 378
Portfolio Turnover Rate 69%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Percent of Total Investments(a)
Sector(b) Long Short Total
Information Technology 12.3 % 5.5 % 17.8 %
Health Care 9.3 % 6.1 % 15.4 %
Financials 8.7 % 5.8 % 14.5 %
Energy 7.2 % 6.9 % 14.1 %
Industrials 7.2 % 6.0 % 13.2 %
Utilities 3.5 % 3.3 % 6.8 %
Consumer Discretionary 4.6 % 1.6 % 6.2 %
Communication Services 4.2 % 0.9 % 5.1 %
Materials 1.2 % 1.3 % 2.5 %
Real Estate 1.1 % 1.2 % 2.3 %
Consumer Staples 0.8 % 1.3 % 2.1 %
60.1 39.9 100.0
​(a)
Includes the gross market value of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any.
​(b)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
C000242844 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock U.S. Insights Long/Short Equity Fund
Class Name Investor A Shares
Trading Symbol BALSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock U.S. Insights Long/Short Equity Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Investor A Shares $95 1.86%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 95
Expense Ratio, Percent 1.86% [51]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Investor A Shares (4.34 )% 4.41 % 10.72 %
Investor A Shares (with sales charge) (9.36 ) (1.07 ) 6.72
S&P 500® Index 15.07 33.89 26.48
50% S&P 500 Index/50% ICE BofA 3-Month U.S. Treasury Bill Index 8.70 18.95 15.68
Performance Inception Date Jun. 13, 2023
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,855,118
Holdings Count | Holding 378
Investment Company Portfolio Turnover 69.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,855,118
Number of Portfolio Holdings 378
Portfolio Turnover Rate 69%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Percent of Total Investments(a)
Sector(b) Long Short Total
Information Technology 12.3 % 5.5 % 17.8 %
Health Care 9.3 % 6.1 % 15.4 %
Financials 8.7 % 5.8 % 14.5 %
Energy 7.2 % 6.9 % 14.1 %
Industrials 7.2 % 6.0 % 13.2 %
Utilities 3.5 % 3.3 % 6.8 %
Consumer Discretionary 4.6 % 1.6 % 6.2 %
Communication Services 4.2 % 0.9 % 5.1 %
Materials 1.2 % 1.3 % 2.5 %
Real Estate 1.1 % 1.2 % 2.3 %
Consumer Staples 0.8 % 1.3 % 2.1 %
60.1 39.9 100.0
​(a)
Includes the gross market value of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any.
​(b)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
C000242843 [Member]  
Shareholder Report [Line Items]  
Fund Name BlackRock U.S. Insights Long/Short Equity Fund
Class Name Class K Shares
Trading Symbol BKLSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BlackRock U.S. Insights Long/Short Equity Fund (the “Fund”) for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at (800) 441‑7762.
Additional Information Phone Number (800) 441‑7762
Additional Information Website blackrock.com/fundreports
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class name Costs of a $10,000
investment		 Costs paid as a percentage of a
$10,000 investment
Class K Shares $80 1.56%(a)
​(a)
Annualized.
Expenses Paid, Amount $ 80
Expense Ratio, Percent 1.56% [52]
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future results.
Average Annual Return [Table Text Block]
Average annual total returns
6-Month
Total
Returns		 1 Year Since Fund
Inception
Class K Shares (4.23 )% 4.65 % 11.04 %
S&P 500® Index 15.07 33.89 26.48
50% S&P 500 Index/50% ICE BofA 3-Month U.S. Treasury Bill Index 8.70 18.95 15.68
Performance Inception Date Jun. 13, 2023
No Deduction of Taxes [Text Block] Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
Updated Performance Information Location [Text Block] Visit blackrock.com for more recent performance information.
Net Assets $ 11,855,118
Holdings Count | Holding 378
Investment Company Portfolio Turnover 69.00%
Additional Fund Statistics [Text Block]
Key Fund statistics
Net Assets $11,855,118
Number of Portfolio Holdings 378
Portfolio Turnover Rate 69%
Holdings [Text Block]
What did the Fund invest in?
(as of November 30, 2024)
Sector allocation
Percent of Total Investments(a)
Sector(b) Long Short Total
Information Technology 12.3 % 5.5 % 17.8 %
Health Care 9.3 % 6.1 % 15.4 %
Financials 8.7 % 5.8 % 14.5 %
Energy 7.2 % 6.9 % 14.1 %
Industrials 7.2 % 6.0 % 13.2 %
Utilities 3.5 % 3.3 % 6.8 %
Consumer Discretionary 4.6 % 1.6 % 6.2 %
Communication Services 4.2 % 0.9 % 5.1 %
Materials 1.2 % 1.3 % 2.5 %
Real Estate 1.1 % 1.2 % 2.3 %
Consumer Staples 0.8 % 1.3 % 2.1 %
60.1 39.9 100.0
​(a)
Includes the gross market value of long and short securities of the underlying derivative contracts and excludes short-term securities and options, if any.
​(b)
For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.
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