Shareholder Report
|
6 Months Ended |
|
Jun. 30, 2026
USD ($)
Holding
|
|---|
| Shareholder Report [Line Items] |
|
|
| Document Type |
N-CSRS
|
|
| Amendment Flag |
false
|
|
| Registrant Name |
BlackRock Variable Series Funds, Inc.
|
|
| Entity Central Index Key |
0000355916
|
|
| Entity Investment Company Type |
N-1A
|
|
| Document Period End Date |
Jun. 30, 2026
|
|
| C000141138 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock 60/40 Target Allocation ETF V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
BVDAX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock 60/40 Target Allocation ETF V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $10Footnote Reference(a) | 0.19%Footnote Reference(a)Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | Excludes fees and expenses incurred indirectly as a result of investments in underlying funds. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 10
|
[1] |
| Expense Ratio, Percent |
0.19%
|
[1],[2] |
| AssetsNet |
$ 938,363,317
|
|
| Holdings Count | Holding |
19
|
|
| InvestmentCompanyPortfolioTurnover |
27.00%
|
|
| Holdings [Text Block] |
Table SummaryInvestment Type | Percent of
Affiliated Investment
Companies |
|---|
Equity Funds........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 55.2% | Fixed-Income Funds........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.6 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.2 | |
|
| C000141139 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock 60/40 Target Allocation ETF V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
BDAVX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock 60/40 Target Allocation ETF V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $23Footnote Reference(a) | 0.44%Footnote Reference(a)Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | Excludes fees and expenses incurred indirectly as a result of investments in underlying funds. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 23
|
[3] |
| Expense Ratio, Percent |
0.44%
|
[3],[4] |
| AssetsNet |
$ 938,363,317
|
|
| Holdings Count | Holding |
19
|
|
| InvestmentCompanyPortfolioTurnover |
27.00%
|
|
| Holdings [Text Block] |
Table SummaryInvestment Type | Percent of
Affiliated Investment
Companies |
|---|
Equity Funds........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 55.2% | Fixed-Income Funds........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33.6 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.2 | |
|
| C000007905 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage Large Cap Core V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
LGCCI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Core V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $33 | 0.64%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 33
|
|
| Expense Ratio, Percent |
0.64%
|
[5] |
| AssetsNet |
$ 228,113,451
|
|
| Holdings Count | Holding |
293
|
|
| InvestmentCompanyPortfolioTurnover |
57.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 36.4% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.6 | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.6 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.6) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007906 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage Large Cap Core V.I. Fund
|
|
| Class Name |
Class II Shares
|
|
| Trading Symbol |
LGCII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Core V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class II Shares | $42 | 0.81%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 42
|
|
| Expense Ratio, Percent |
0.81%
|
[6] |
| AssetsNet |
$ 228,113,451
|
|
| Holdings Count | Holding |
293
|
|
| InvestmentCompanyPortfolioTurnover |
57.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 36.4% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.6 | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.6 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.6) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007907 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage Large Cap Core V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
LCIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Core V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $48 | 0.92%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 48
|
|
| Expense Ratio, Percent |
0.92%
|
[7] |
| AssetsNet |
$ 228,113,451
|
|
| Holdings Count | Holding |
293
|
|
| InvestmentCompanyPortfolioTurnover |
57.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 36.4% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.6 | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.6 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.6) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007911 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage Large Cap Value V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
LCATT
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Value V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $32 | 0.60%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 32
|
|
| Expense Ratio, Percent |
0.60%
|
[8] |
| AssetsNet |
$ 109,454,075
|
|
| Holdings Count | Holding |
323
|
|
| InvestmentCompanyPortfolioTurnover |
80.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.2% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.2 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.7 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.3 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.4 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.2) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007913 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage Large Cap Value V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
LVIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage Large Cap Value V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $46 | 0.85%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 46
|
|
| Expense Ratio, Percent |
0.85%
|
[9] |
| AssetsNet |
$ 109,454,075
|
|
| Holdings Count | Holding |
323
|
|
| InvestmentCompanyPortfolioTurnover |
80.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.2% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.2 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.7 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.3 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.4 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.2) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007914 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage SMID Cap V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
SMCPI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage SMID Cap V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $31 | 0.55%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 31
|
|
| Expense Ratio, Percent |
0.55%
|
[10] |
| AssetsNet |
$ 178,955,176
|
|
| Holdings Count | Holding |
768
|
|
| InvestmentCompanyPortfolioTurnover |
55.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.2% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.7 | Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.6 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.1 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.1 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.7 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (9.9) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007916 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Advantage SMID Cap V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
SCIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Advantage SMID Cap V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $45 | 0.80%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 45
|
|
| Expense Ratio, Percent |
0.80%
|
[11] |
| AssetsNet |
$ 178,955,176
|
|
| Holdings Count | Holding |
768
|
|
| InvestmentCompanyPortfolioTurnover |
55.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.2% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.7 | Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.6 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.1 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.1 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.7 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (9.9) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007923 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Basic Value V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
BAVLI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Basic Value V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $38 | 0.73%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 38
|
|
| Expense Ratio, Percent |
0.73%
|
[12] |
| AssetsNet |
$ 334,583,200
|
|
| Holdings Count | Holding |
64
|
|
| InvestmentCompanyPortfolioTurnover |
55.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.0% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.9 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.1 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.8 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.8 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.9 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.7 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.2 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.7 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (8.6) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007925 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Basic Value V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
BVIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Basic Value V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $53 | 1.01%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 53
|
|
| Expense Ratio, Percent |
1.01%
|
[13] |
| AssetsNet |
$ 334,583,200
|
|
| Holdings Count | Holding |
64
|
|
| InvestmentCompanyPortfolioTurnover |
55.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.0% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.9 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.1 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.8 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.8 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.9 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.7 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.2 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.7 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (8.6) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007932 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Capital Appreciation V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
FDGRI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Capital Appreciation V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $41 | 0.78%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 41
|
|
| Expense Ratio, Percent |
0.78%
|
[14] |
| AssetsNet |
$ 88,607,284
|
|
| Holdings Count | Holding |
33
|
|
| InvestmentCompanyPortfolioTurnover |
55.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 53.8% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.4 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.0) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007934 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Capital Appreciation V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
FGIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Capital Appreciation V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $55 | 1.04%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 55
|
|
| Expense Ratio, Percent |
1.04%
|
[15] |
| AssetsNet |
$ 88,607,284
|
|
| Holdings Count | Holding |
33
|
|
| InvestmentCompanyPortfolioTurnover |
55.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 53.8% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.4 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.4 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.0) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007917 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Equity Dividend V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
UTTLI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Equity Dividend V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $35 | 0.67%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 35
|
|
| Expense Ratio, Percent |
0.67%
|
[16] |
| AssetsNet |
$ 309,214,356
|
|
| Holdings Count | Holding |
85
|
|
| InvestmentCompanyPortfolioTurnover |
58.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.4% | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.7 | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.2 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.5 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.1 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.8 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.1 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (5.3) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007919 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Equity Dividend V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
UTIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Equity Dividend V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $48 | 0.92%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 48
|
|
| Expense Ratio, Percent |
0.92%
|
[17] |
| AssetsNet |
$ 309,214,356
|
|
| Holdings Count | Holding |
85
|
|
| InvestmentCompanyPortfolioTurnover |
58.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.4% | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.7 | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.2 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.5 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.1 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.8 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.1 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (5.3) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007938 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Global Allocation V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
GLALI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Global Allocation V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| Material Fund Change Notice [Text Block] |
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $39 | 0.75%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 39
|
|
| Expense Ratio, Percent |
0.75%
|
[18] |
| AssetsNet |
$ 4,067,470,878
|
|
| Holdings Count | Holding |
2,633
|
|
| InvestmentCompanyPortfolioTurnover |
78.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $4,067,470,878 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2,633 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 78% |
|---|
|
|
| Holdings [Text Block] |
Table Summary | Percent of Total
InvestmentsFootnote Reference(a) |
|---|
Country/Geographic Region | Long | Short | Total |
|---|
United States........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 67.4% | -% | 67.4% | United Kingdom........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | - | 4.5 | France........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | - | 2.6 | Netherlands........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | - | 2.3 | Taiwan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | - | 2.2 | Japan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | - | 2.2 | Germany........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | - | 2.0 | Italy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | - | 1.7 | Canada........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | - | 1.7 | South Korea........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | - | 1.6 | OtherFootnote Reference(b)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.8 | - | 11.8 | Total........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 100.0% | -% | 100.0% | | Footnote | Description | Footnote(a) | Includes the gross market value of long and short securities and excludes short-term securities and options, if any. | Footnote(b) | Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other. |
|
|
| C000007939 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Global Allocation V.I. Fund
|
|
| Class Name |
Class II Shares
|
|
| Trading Symbol |
GLAII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Global Allocation V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| Material Fund Change Notice [Text Block] |
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class II Shares | $46 | 0.90%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 46
|
|
| Expense Ratio, Percent |
0.90%
|
[19] |
| AssetsNet |
$ 4,067,470,878
|
|
| Holdings Count | Holding |
2,633
|
|
| InvestmentCompanyPortfolioTurnover |
78.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $4,067,470,878 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2,633 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 78% |
|---|
|
|
| Holdings [Text Block] |
Table Summary | Percent of Total
InvestmentsFootnote Reference(a) |
|---|
Country/Geographic Region | Long | Short | Total |
|---|
United States........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 67.4% | -% | 67.4% | United Kingdom........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | - | 4.5 | France........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | - | 2.6 | Netherlands........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | - | 2.3 | Taiwan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | - | 2.2 | Japan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | - | 2.2 | Germany........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | - | 2.0 | Italy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | - | 1.7 | Canada........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | - | 1.7 | South Korea........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | - | 1.6 | OtherFootnote Reference(b)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.8 | - | 11.8 | Total........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 100.0% | -% | 100.0% | | Footnote | Description | Footnote(a) | Includes the gross market value of long and short securities and excludes short-term securities and options, if any. | Footnote(b) | Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other. |
|
|
| C000007940 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Global Allocation V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
GAIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Global Allocation V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| Material Fund Change Notice [Text Block] |
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $52 | 1.00%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 52
|
|
| Expense Ratio, Percent |
1.00%
|
[20] |
| AssetsNet |
$ 4,067,470,878
|
|
| Holdings Count | Holding |
2,633
|
|
| InvestmentCompanyPortfolioTurnover |
78.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $4,067,470,878 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2,633 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 78% |
|---|
|
|
| Holdings [Text Block] |
Table Summary | Percent of Total
InvestmentsFootnote Reference(a) |
|---|
Country/Geographic Region | Long | Short | Total |
|---|
United States........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 67.4% | -% | 67.4% | United Kingdom........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | - | 4.5 | France........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | - | 2.6 | Netherlands........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | - | 2.3 | Taiwan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | - | 2.2 | Japan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | - | 2.2 | Germany........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | - | 2.0 | Italy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | - | 1.7 | Canada........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | - | 1.7 | South Korea........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | - | 1.6 | OtherFootnote Reference(b)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.8 | - | 11.8 | Total........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 100.0% | -% | 100.0% | | Footnote | Description | Footnote(a) | Includes the gross market value of long and short securities and excludes short-term securities and options, if any. | Footnote(b) | Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other. |
|
|
| C000007929 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Government Money Market V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
DMMKI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Government Money Market V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| Material Fund Change Notice [Text Block] |
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $15 | 0.30%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 15
|
|
| Expense Ratio, Percent |
0.30%
|
[21] |
| AssetsNet |
$ 232,463,922
|
|
| Holdings Count | Holding |
165
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $232,463,922 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 165 |
|---|
Current seven-day yields as of June 30, 2026 (The 7-Day SEC Yield may differ from the 7-Day Yield shown due to the fact that the 7-Day SEC Yield excludes distributed capital gains.) | 0 |
|---|
7-Day SEC Yield........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.40% |
|---|
7-Day Yield........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.40% |
|---|
|
|
| Holdings [Text Block] |
Table SummaryAsset Type | Percent of
Net Assets |
|---|
Repurchase Agreements........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 41.7% | U.S. Treasury Obligations........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 32.8 | U.S. Government Sponsored Agency Obligations........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 25.4 | Other Assets Less Liabilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | |
|
| C000195945 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock International Index V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
BIIVX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock International Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $13 | 0.24%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 13
|
|
| Expense Ratio, Percent |
0.24%
|
[22] |
| AssetsNet |
$ 347,668,618
|
|
| Holdings Count | Holding |
684
|
|
| InvestmentCompanyPortfolioTurnover |
3.00%
|
|
| Holdings [Text Block] |
Table SummaryCountry/Geographic Region | Percent of
Net Assets |
|---|
Japan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.4% | United Kingdom........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.2 | France........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.4 | Germany........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.6 | Australia........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.2 | Switzerland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.2 | Netherlands........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | United States........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 | Spain........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | Italy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | OtherFootnote Reference(a)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.3) | | Footnote | Description | Footnote(a) | Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other. |
|
|
| C000225417 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock International Index V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
BIIYX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock International Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $26 | 0.49%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 26
|
|
| Expense Ratio, Percent |
0.49%
|
[23] |
| AssetsNet |
$ 347,668,618
|
|
| Holdings Count | Holding |
684
|
|
| InvestmentCompanyPortfolioTurnover |
3.00%
|
|
| Holdings [Text Block] |
Table SummaryCountry/Geographic Region | Percent of
Net Assets |
|---|
Japan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.4% | United Kingdom........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.2 | France........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.4 | Germany........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.6 | Australia........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.2 | Switzerland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.2 | Netherlands........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | United States........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 | Spain........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | Italy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | OtherFootnote Reference(a)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.3) | | Footnote | Description | Footnote(a) | Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other. |
|
|
| C000007920 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock International V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
IVVVI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock International V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $44 | 0.84%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 44
|
|
| Expense Ratio, Percent |
0.84%
|
[24] |
| AssetsNet |
$ 77,389,334
|
|
| Holdings Count | Holding |
49
|
|
| InvestmentCompanyPortfolioTurnover |
35.00%
|
|
| Holdings [Text Block] |
Table SummaryCountry/Geographic Region | Percent of
Net Assets |
|---|
Japan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.0% | United Kingdom........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.8 | South Korea........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.1 | Taiwan........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.0 | France........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.2 | Netherlands........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.4 | China........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.6 | Germany........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.1 | Sweden........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.9 | India........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | OtherFootnote Reference(a)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.5 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (1.7) | | Footnote | Description | Footnote(a) | Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other. |
|
|
| C000007908 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Large Cap Focus Growth V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
LGGGI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Large Cap Focus Growth V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $41 | 0.78%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 41
|
|
| Expense Ratio, Percent |
0.78%
|
[25] |
| AssetsNet |
$ 273,399,604
|
|
| Holdings Count | Holding |
34
|
|
| InvestmentCompanyPortfolioTurnover |
50.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 52.0% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.8 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.3 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.2 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (0.3) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007910 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Large Cap Focus Growth V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
LGIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Large Cap Focus Growth V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $54 | 1.03%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 54
|
|
| Expense Ratio, Percent |
1.03%
|
[26] |
| AssetsNet |
$ 273,399,604
|
|
| Holdings Count | Holding |
34
|
|
| InvestmentCompanyPortfolioTurnover |
50.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 52.0% | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.8 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.3 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.2 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (0.3) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007899 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Managed Volatility V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
AMBLI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Managed Volatility V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $31 | 0.59%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 31
|
|
| Expense Ratio, Percent |
0.59%
|
[27] |
| AssetsNet |
$ 147,463,872
|
|
| Holdings Count | Holding |
901
|
|
| InvestmentCompanyPortfolioTurnover |
62.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.4% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.0 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.8 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.6 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.5 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.5 | Other Assets Less Liabilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.3 | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007901 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Managed Volatility V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
ABIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Managed Volatility V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $44 | 0.84%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 44
|
|
| Expense Ratio, Percent |
0.84%
|
[28] |
| AssetsNet |
$ 147,463,872
|
|
| Holdings Count | Holding |
901
|
|
| InvestmentCompanyPortfolioTurnover |
62.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.4% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.0 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.8 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.6 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.5 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.5 | Other Assets Less Liabilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.3 | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007902 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock S&P 500 Index V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
IDXVI
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock S&P 500 Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $7 | 0.14%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 7
|
|
| Expense Ratio, Percent |
0.14%
|
[29] |
| AssetsNet |
$ 3,319,903,389
|
|
| Holdings Count | Holding |
507
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 37.9% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.7 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.7 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.9 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.9 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (0.9) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007903 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock S&P 500 Index V.I. Fund
|
|
| Class Name |
Class II Shares
|
|
| Trading Symbol |
IXVII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock S&P 500 Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class II Shares | $15 | 0.29%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 15
|
|
| Expense Ratio, Percent |
0.29%
|
[30] |
| AssetsNet |
$ 3,319,903,389
|
|
| Holdings Count | Holding |
507
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 37.9% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.7 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.7 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.9 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.9 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (0.9) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000007904 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock S&P 500 Index V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
IVIII
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock S&P 500 Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $20 | 0.38%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 20
|
|
| Expense Ratio, Percent |
0.38%
|
[31] |
| AssetsNet |
$ 3,319,903,389
|
|
| Holdings Count | Holding |
507
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 37.9% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.7 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.7 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.9 | Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.9 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (0.9) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000195946 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Small Cap Index V.I. Fund
|
|
| Class Name |
Class I Shares
|
|
| Trading Symbol |
BSIVX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Small Cap Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class I Shares | $11 | 0.21%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 11
|
|
| Expense Ratio, Percent |
0.21%
|
[32] |
| AssetsNet |
$ 430,244,016
|
|
| Holdings Count | Holding |
1,995
|
|
| InvestmentCompanyPortfolioTurnover |
22.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.9% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.3 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.8 | Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.2 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.7 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.7 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (17.3) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
| C000225418 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
BlackRock Small Cap Index V.I. Fund
|
|
| Class Name |
Class III Shares
|
|
| Trading Symbol |
BSIYX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about BlackRock Small Cap Index V.I. Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
|
|
| 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) 537-4942.
|
|
| 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) Table SummaryClass name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
Class III Shares | $25 | 0.46%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 25
|
|
| Expense Ratio, Percent |
0.46%
|
[33] |
| AssetsNet |
$ 430,244,016
|
|
| Holdings Count | Holding |
1,995
|
|
| InvestmentCompanyPortfolioTurnover |
22.00%
|
|
| Holdings [Text Block] |
Table SummarySectorFootnote Reference(a) | Percent of
Net Assets |
|---|
Health Care........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.9% | Financials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.3 | Industrials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.8 | Information Technology........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.2 | Consumer Discretionary........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | Real Estate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.7 | Energy........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.7 | Materials........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Utilities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Communication Services........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | Consumer Staples........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | Short-Term Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.1 | Liabilities in Excess of Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | (17.3) | | Footnote | Description | Footnote(a) | For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. |
|
|
|
|