| Form N-CSR Cover | 6 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | BlackRock Mid-Cap Value Series, Inc. |
| Entity Central Index Key | 0000918848 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 6 Months Ended | |
| Oct. 31, 2024 USD ($) Holding | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| Amendment Flag | false | |
| Registrant Name | BlackRock Mid-Cap Value Series, Inc. | |
| Entity Central Index Key | 0000918848 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Oct. 31, 2024 | |
| C000007001 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BlackRock Mid-Cap Value Fund | |
| Class Name | Institutional Shares | |
| Trading Symbol | MARFX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock Mid-Cap Value Fund (the “Fund”) for the period of May 1, 2024 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports | |
| Additional Information Phone Number | (800) 441‑7762 | |
| Additional Information Website | blackrock.com/fundreports | |
| Expenses [Text Block] | What were the Fund costs for the last six months ? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Institutional Shares $ 0.74 % (a) (a) Annualized. | |
| Expenses Paid, Amount | $ 39 | |
| Expense Ratio, Percent | 0.74% | [1] |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. | |
| Average Annual Return [Table Text Block] | Average annual total returns 6-Month 1 Year 5 Years 10 Years Institutional Shares 7.97 % 27.58 % 11.67 % 9.16 % Russell 1000 ® 13.95 38.07 15.00 12.75 Russell Midcap ® 10.79 34.03 9.93 8.43 | |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. | |
| Updated Performance Information Location [Text Block] | Visit blackrock.com | |
| Net Assets | $ 1,050,910,637 | |
| Holdings Count | Holding | 103 | |
| Investment Company Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ Number of Portfolio Holdings 103 Portfolio Turnover Rate 28 % | |
| Holdings [Text Block] | What did the Fund invest in? (as of October 31, 2024) Sector allocation Sector (a) Percent of Industrials 16.1 % Financials 14.1 % Health Care 12.8 % Information Technology 9.0 % Consumer Staples 8.2 % Consumer Discretionary 7.3 % Utilities 7.3 % Communication Services 6.9 % Materials 6.8 % Energy 4.7 % Real Estate 2.5 % Short-Term Securities 5.5 % Liabilities in Excess of Other Assets (1.2 ) Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. (b) Excludes short-term securities. | |
| Largest Holdings [Text Block] | Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % | |
| C000006998 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BlackRock Mid-Cap Value Fund | |
| Class Name | Investor A Shares | |
| Trading Symbol | MDRFX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock Mid-Cap Value Fund (the “Fund”) for the period of May 1, 2024 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports | |
| Additional Information Phone Number | (800) 441‑7762 | |
| Additional Information Website | blackrock.com/fundreports | |
| Expenses [Text Block] | What were the Fund costs for the last six months ? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A Shares $ 0.99 % (a) (a) Annualized. | |
| Expenses Paid, Amount | $ 52 | |
| Expense Ratio, Percent | 0.99% | [2] |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. | |
| Average Annual Return [Table Text Block] | Average annual total returns 6-Month 1 Year 5 Years 10 Years Investor A Shares 7.84 % 27.20 % 11.38 % 8.87 % Investor A Shares (with sales charge) 2.18 20.52 10.18 8.28 Russell 1000 ® 13.95 38.07 15.00 12.75 Russell Midcap ® 10.79 34.03 9.93 8.43 | |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. | |
| Updated Performance Information Location [Text Block] | Visit blackrock.com | |
| Net Assets | $ 1,050,910,637 | |
| Holdings Count | Holding | 103 | |
| Investment Company Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ Number of Portfolio Holdings 103 Portfolio Turnover Rate 28 % | |
| Holdings [Text Block] | What did the Fund invest in? (as of October 31, 2024) Sector allocation Sector (a) Percent of Industrials 16.1 % Financials 14.1 % Health Care 12.8 % Information Technology 9.0 % Consumer Staples 8.2 % Consumer Discretionary 7.3 % Utilities 7.3 % Communication Services 6.9 % Materials 6.8 % Energy 4.7 % Real Estate 2.5 % Short-Term Securities 5.5 % Liabilities in Excess of Other Assets (1.2 ) Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. (b) Excludes short-term securities. | |
| Largest Holdings [Text Block] | Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % | |
| C000007000 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BlackRock Mid-Cap Value Fund | |
| Class Name | Investor C Shares | |
| Trading Symbol | MCRFX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock Mid-Cap Value Fund (the “Fund”) for the period of May 1, 2024 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports | |
| Additional Information Phone Number | (800) 441‑7762 | |
| Additional Information Website | blackrock.com/fundreports | |
| Expenses [Text Block] | What were the Fund costs for the last six months ? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor C Shares $ 1.74 % (a) (a) Annualized. | |
| Expenses Paid, Amount | $ 91 | |
| Expense Ratio, Percent | 1.74% | [3] |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. | |
| Average Annual Return [Table Text Block] | Average annual total returns 6-Month 1 Year 5 Years 10 Years Investor C Shares 7.42 % 26.23 % 10.55 % 8.20 % Investor C Shares (with sales charge) 6.42 25.23 10.55 8.20 Russell 1000 ® 13.95 38.07 15.00 12.75 Russell Midcap ® 10.79 34.03 9.93 8.43 | |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. | |
| Updated Performance Information Location [Text Block] | Visit blackrock.com | |
| Net Assets | $ 1,050,910,637 | |
| Holdings Count | Holding | 103 | |
| Investment Company Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ Number of Portfolio Holdings 103 Portfolio Turnover Rate 28 % | |
| Holdings [Text Block] | What did the Fund invest in? (as of October 31, 2024) Sector allocation Sector (a) Percent of Industrials 16.1 % Financials 14.1 % Health Care 12.8 % Information Technology 9.0 % Consumer Staples 8.2 % Consumer Discretionary 7.3 % Utilities 7.3 % Communication Services 6.9 % Materials 6.8 % Energy 4.7 % Real Estate 2.5 % Short-Term Securities 5.5 % Liabilities in Excess of Other Assets (1.2 ) Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. (b) Excludes short-term securities. | |
| Largest Holdings [Text Block] | Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % | |
| C000199762 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BlackRock Mid-Cap Value Fund | |
| Class Name | Class K Shares | |
| Trading Symbol | MJRFX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock Mid-Cap Value Fund (the “Fund”) for the period of May 1, 2024 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports | |
| Additional Information Phone Number | (800) 441‑7762 | |
| Additional Information Website | blackrock.com/fundreports | |
| Expenses [Text Block] | What were the Fund costs for the last six months ? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Class K Shares $ 0.69 % (a) (a) Annualized. | |
| Expenses Paid, Amount | $ 36 | |
| Expense Ratio, Percent | 0.69% | [4] |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. | |
| Average Annual Return [Table Text Block] | Average annual total returns 6-Month 1 Year 5 Years 10 Years Class K Shares 7.99 % 27.59 % 11.72 % 9.20 % Russell 1000 ® 13.95 38.07 15.00 12.75 Russell Midcap ® 10.79 34.03 9.93 8.43 | |
| Performance Inception Date | Jan. 25, 2018 | |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. | |
| Updated Performance Information Location [Text Block] | Visit blackrock.com | |
| Net Assets | $ 1,050,910,637 | |
| Holdings Count | Holding | 103 | |
| Investment Company Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ Number of Portfolio Holdings 103 Portfolio Turnover Rate 28 % | |
| Holdings [Text Block] | What did the Fund invest in? (as of October 31, 2024) Sector allocation Sector (a) Percent of Industrials 16.1 % Financials 14.1 % Health Care 12.8 % Information Technology 9.0 % Consumer Staples 8.2 % Consumer Discretionary 7.3 % Utilities 7.3 % Communication Services 6.9 % Materials 6.8 % Energy 4.7 % Real Estate 2.5 % Short-Term Securities 5.5 % Liabilities in Excess of Other Assets (1.2 ) Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. (b) Excludes short-term securities. | |
| Largest Holdings [Text Block] | Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % | |
| C000007002 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BlackRock Mid-Cap Value Fund | |
| Class Name | Class R Shares | |
| Trading Symbol | MRRFX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BlackRock Mid-Cap Value Fund (the “Fund”) for the period of May 1, 2024 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports | |
| Additional Information Phone Number | (800) 441‑7762 | |
| Additional Information Website | blackrock.com/fundreports | |
| Expenses [Text Block] | What were the Fund costs for the last six months ? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Class R Shares $ 1.24 % (a) (a) Annualized. | |
| Expenses Paid, Amount | $ 65 | |
| Expense Ratio, Percent | 1.24% | [5] |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. | |
| Average Annual Return [Table Text Block] | Average annual total returns 6-Month 1 Year 5 Years 10 Years Class R Shares 7.73 % 26.87 % 11.11 % 8.58 % Russell 1000 ® 13.95 38.07 15.00 12.75 Russell Midcap ® 10.79 34.03 9.93 8.43 | |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. | |
| Updated Performance Information Location [Text Block] | Visit blackrock.com | |
| Net Assets | $ 1,050,910,637 | |
| Holdings Count | Holding | 103 | |
| Investment Company Portfolio Turnover | 28% | |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ Number of Portfolio Holdings 103 Portfolio Turnover Rate 28 % | |
| Holdings [Text Block] | What did the Fund invest in? (as of October 31, 2024) Sector allocation Sector (a) Percent of Industrials 16.1 % Financials 14.1 % Health Care 12.8 % Information Technology 9.0 % Consumer Staples 8.2 % Consumer Discretionary 7.3 % Utilities 7.3 % Communication Services 6.9 % Materials 6.8 % Energy 4.7 % Real Estate 2.5 % Short-Term Securities 5.5 % Liabilities in Excess of Other Assets (1.2 ) Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % (a) For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. (b) Excludes short-term securities. | |
| Largest Holdings [Text Block] | Ten largest holdings Security (b) Percent of Cardinal Health, Inc. 2.7 % First Citizens BancShares, Inc., Class A 2.5 % Kraft Heinz Co. 2.3 % Baxter International, Inc. 2.2 % L3Harris Technologies, Inc. 2.2 % Fidelity National Information Services, Inc. 2.0 % SS&C Technologies Holdings, Inc. 2.0 % Western Digital Corp. 1.9 % Sealed Air Corp. 1.9 % HP, Inc. 1.8 % | |
| [1]Annualized.[2]Annualized.[3]Annualized.[4]Annualized.[5]Annualized. | ||
| Shareholder Report, Line Graph (Details) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | |
| C000007001 [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Institutional Shares | |||
| Average Annual Return, Percent | 7.97% | 27.58% | 11.67% | 9.16% |
| C000006998 [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Investor A Shares (with sales charge) | |||
| Average Annual Return, Percent | 2.18% | 20.52% | 10.18% | 8.28% |
| C000006998 [Member] | Without Sales Load [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Investor A Shares | |||
| Average Annual Return, Percent | 7.84% | 27.20% | 11.38% | 8.87% |
| C000007000 [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Investor C Shares (with sales charge) | |||
| Average Annual Return, Percent | 6.42% | 25.23% | 10.55% | 8.20% |
| C000007000 [Member] | Without Sales Load [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Investor C Shares | |||
| Average Annual Return, Percent | 7.42% | 26.23% | 10.55% | 8.20% |
| C000199762 [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Class K Shares | |||
| Average Annual Return, Percent | 7.99% | 27.59% | 11.72% | 9.20% |
| C000007002 [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Class R Shares | |||
| Average Annual Return, Percent | 7.73% | 26.87% | 11.11% | 8.58% |
| Russell 1000 Index [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000® Index | |||
| Average Annual Return, Percent | 13.95% | 38.07% | 15% | 12.75% |
| Russell Midcap Value Index [Member] | ||||
| Account Value [Line Items] | ||||
| Line Graph and Table Measure Name | Russell Midcap® Value Index | |||
| Average Annual Return, Percent | 10.79% | 34.03% | 9.93% | 8.43% |
| Shareholder Report, Holdings (Details) | Oct. 31, 2024 | |
| C000007001 [Member] | Cardinal Health Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.70% | [1] |
| C000007001 [Member] | First Citizens BancShares Inc Class A [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [1] |
| C000007001 [Member] | Kraft Heinz Co [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [1] |
| C000007001 [Member] | Baxter International Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [1] |
| C000007001 [Member] | L3Harris Technologies Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [1] |
| C000007001 [Member] | Fidelity National Information Services Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [1] |
| C000007001 [Member] | SS And C Technologies Holdings Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [1] |
| C000007001 [Member] | Western Digital Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [1] |
| C000007001 [Member] | Sealed Air Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [1] |
| C000007001 [Member] | HP Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.80% | [1] |
| C000007001 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16.10% | [2] |
| C000007001 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.10% | [2] |
| C000007001 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.80% | [2] |
| C000007001 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9% | [2] |
| C000007001 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.20% | [2] |
| C000007001 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [2] |
| C000007001 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [2] |
| C000007001 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.90% | [2] |
| C000007001 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [2] |
| C000007001 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.70% | [2] |
| C000007001 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [2] |
| C000007001 [Member] | Short-Term Investments [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.50% | [2] |
| C000007001 [Member] | Liabilities in Excess of Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [2] |
| C000006998 [Member] | Cardinal Health Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.70% | [3] |
| C000006998 [Member] | First Citizens BancShares Inc Class A [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [3] |
| C000006998 [Member] | Kraft Heinz Co [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [3] |
| C000006998 [Member] | Baxter International Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [3] |
| C000006998 [Member] | L3Harris Technologies Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [3] |
| C000006998 [Member] | Fidelity National Information Services Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [3] |
| C000006998 [Member] | SS And C Technologies Holdings Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [3] |
| C000006998 [Member] | Western Digital Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [3] |
| C000006998 [Member] | Sealed Air Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [3] |
| C000006998 [Member] | HP Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.80% | [3] |
| C000006998 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16.10% | [4] |
| C000006998 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.10% | [4] |
| C000006998 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.80% | [4] |
| C000006998 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9% | [4] |
| C000006998 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.20% | [4] |
| C000006998 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [4] |
| C000006998 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [4] |
| C000006998 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.90% | [4] |
| C000006998 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [4] |
| C000006998 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.70% | [4] |
| C000006998 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [4] |
| C000006998 [Member] | Short-Term Investments [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.50% | [4] |
| C000006998 [Member] | Liabilities in Excess of Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [4] |
| C000007000 [Member] | Cardinal Health Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.70% | [5] |
| C000007000 [Member] | First Citizens BancShares Inc Class A [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [5] |
| C000007000 [Member] | Kraft Heinz Co [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [5] |
| C000007000 [Member] | Baxter International Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [5] |
| C000007000 [Member] | L3Harris Technologies Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [5] |
| C000007000 [Member] | Fidelity National Information Services Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [5] |
| C000007000 [Member] | SS And C Technologies Holdings Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [5] |
| C000007000 [Member] | Western Digital Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [5] |
| C000007000 [Member] | Sealed Air Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [5] |
| C000007000 [Member] | HP Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.80% | [5] |
| C000007000 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16.10% | [6] |
| C000007000 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.10% | [6] |
| C000007000 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.80% | [6] |
| C000007000 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9% | [6] |
| C000007000 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.20% | [6] |
| C000007000 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [6] |
| C000007000 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [6] |
| C000007000 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.90% | [6] |
| C000007000 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [6] |
| C000007000 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.70% | [6] |
| C000007000 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [6] |
| C000007000 [Member] | Short-Term Investments [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.50% | [6] |
| C000007000 [Member] | Liabilities in Excess of Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [6] |
| C000199762 [Member] | Cardinal Health Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.70% | [7] |
| C000199762 [Member] | First Citizens BancShares Inc Class A [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [7] |
| C000199762 [Member] | Kraft Heinz Co [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [7] |
| C000199762 [Member] | Baxter International Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [7] |
| C000199762 [Member] | L3Harris Technologies Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [7] |
| C000199762 [Member] | Fidelity National Information Services Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [7] |
| C000199762 [Member] | SS And C Technologies Holdings Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [7] |
| C000199762 [Member] | Western Digital Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [7] |
| C000199762 [Member] | Sealed Air Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [7] |
| C000199762 [Member] | HP Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.80% | [7] |
| C000199762 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16.10% | [8] |
| C000199762 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.10% | [8] |
| C000199762 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.80% | [8] |
| C000199762 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9% | [8] |
| C000199762 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.20% | [8] |
| C000199762 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [8] |
| C000199762 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [8] |
| C000199762 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.90% | [8] |
| C000199762 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [8] |
| C000199762 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.70% | [8] |
| C000199762 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [8] |
| C000199762 [Member] | Short-Term Investments [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.50% | [8] |
| C000199762 [Member] | Liabilities in Excess of Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [8] |
| C000007002 [Member] | Cardinal Health Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.70% | [9] |
| C000007002 [Member] | First Citizens BancShares Inc Class A [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [9] |
| C000007002 [Member] | Kraft Heinz Co [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.30% | [9] |
| C000007002 [Member] | Baxter International Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [9] |
| C000007002 [Member] | L3Harris Technologies Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.20% | [9] |
| C000007002 [Member] | Fidelity National Information Services Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [9] |
| C000007002 [Member] | SS And C Technologies Holdings Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2% | [9] |
| C000007002 [Member] | Western Digital Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [9] |
| C000007002 [Member] | Sealed Air Corp [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.90% | [9] |
| C000007002 [Member] | HP Inc [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 1.80% | [9] |
| C000007002 [Member] | Industrial Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 16.10% | [10] |
| C000007002 [Member] | Financial Services Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 14.10% | [10] |
| C000007002 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 12.80% | [10] |
| C000007002 [Member] | Information Technology Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 9% | [10] |
| C000007002 [Member] | Consumer Staples Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 8.20% | [10] |
| C000007002 [Member] | Consumer Discretionary Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [10] |
| C000007002 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 7.30% | [10] |
| C000007002 [Member] | Communications Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.90% | [10] |
| C000007002 [Member] | Materials Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 6.80% | [10] |
| C000007002 [Member] | Energy Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 4.70% | [10] |
| C000007002 [Member] | Real Estate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 2.50% | [10] |
| C000007002 [Member] | Short-Term Investments [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | 5.50% | [10] |
| C000007002 [Member] | Liabilities in Excess of Other Assets [Member] | ||
| Holdings [Line Items] | ||
| Percent of Net Asset Value | (1.20%) | [10] |
| [1]Excludes short-term securities.[2]For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.[3]Excludes short-term securities.[4]For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.[5]Excludes short-term securities.[6]For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.[7]Excludes short-term securities.[8]For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.[9]Excludes short-term securities.[10]For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes. | ||
