| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | BNY Mellon Strategic Funds, Inc. |
| Entity Central Index Key | 0000737520 |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended | |
| Jun. 30, 2024 USD ($) | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| Amendment Flag | false | |
| Registrant Name | BNY Mellon Strategic Funds, Inc. | |
| Entity Central Index Key | 0000737520 | |
| Document Period End Date | Jun. 30, 2024 | |
| Class A - DSGAX | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BNY Mellon Active MidCap Fund | |
| Class Name | Class A | |
| Trading Symbol | DNLDX | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Class C - DSGCX | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BNY Mellon Active MidCap Fund | |
| Class Name | Class C | |
| Trading Symbol | DNLCX | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Class I - DSGIX | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BNY Mellon Active MidCap Fund | |
| Class Name | Class I | |
| Trading Symbol | DNLRX | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| Class Y - DSGYX | ||
| Shareholder Report [Line Items] | ||
| Fund Name | BNY Mellon Active MidCap Fund | |
| Class Name | Class Y | |
| Trading Symbol | DNLYX | |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | |
| BNY Mellon Active MidCap Fund | Class A - DSGAX | ||
| Shareholder Report [Line Items] | ||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info bnymellon.com. | |
| Additional Information [Text Block] | You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bnymellon.com. | |
| Additional Information Phone Number | 1-800-373-9387 | |
| Additional Information Email | info@bnymellon.com | |
| Additional Information Website | im.bnymellon.com/literaturecenter | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Share Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A * $50 0.98% ** * During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. ** Annualized | |
| Expenses Paid, Amount | $ 50 | [1] |
| Expense Ratio, Percent | 0.98% | [1],[2] |
| Net Assets | $ 434,000,000 | |
| Holdings Count | 241 | |
| Portfolio Turnover | 31.53% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (AS OF 6/30/24) Fund Size (Millions) Number of Holdings Portfolio Turnover $434 241 31.53% | |
| Holdings [Text Block] | Portfolio Holdings (as of 6/30/24) Top Ten Holdings (Based on Net Assets) * * Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any. Sector Allocation (Based on Net Assets) | |
| Updated Prospectus Web Address | im.bnymellon.com/literaturecenter | |
| BNY Mellon Active MidCap Fund | Class C - DSGCX | ||
| Shareholder Report [Line Items] | ||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info bnymellon.com. | |
| Additional Information [Text Block] | You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bnymellon.com. | |
| Additional Information Phone Number | 1-800-373-9387 | |
| Additional Information Email | info@bnymellon.com | |
| Additional Information Website | im.bnymellon.com/literaturecenter | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Share Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C * $88 1.74% ** * During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. ** Annualized | |
| Expenses Paid, Amount | $ 88 | [3] |
| Expense Ratio, Percent | 1.74% | [3],[4] |
| Net Assets | $ 434,000,000 | |
| Holdings Count | 241 | |
| Portfolio Turnover | 31.53% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (AS OF 6/30/24) Fund Size (Millions) Number of Holdings Portfolio Turnover $434 241 31.53% | |
| Holdings [Text Block] | Portfolio Holdings (as of 6/30/24) Top Ten Holdings (Based on Net Assets) * * Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any. Sector Allocation (Based on Net Assets) | |
| Updated Prospectus Web Address | im.bnymellon.com/literaturecenter | |
| BNY Mellon Active MidCap Fund | Class I - DSGIX | ||
| Shareholder Report [Line Items] | ||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info bnymellon.com. | |
| Additional Information [Text Block] | You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bnymellon.com. | |
| Additional Information Phone Number | 1-800-373-9387 | |
| Additional Information Email | info@bnymellon.com | |
| Additional Information Website | im.bnymellon.com/literaturecenter | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Share Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I * $37 0.73% ** * During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. ** Annualized | |
| Expenses Paid, Amount | $ 37 | [5] |
| Expense Ratio, Percent | 0.73% | [5],[6] |
| Net Assets | $ 434,000,000 | |
| Holdings Count | 241 | |
| Portfolio Turnover | 31.53% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (AS OF 6/30/24) Fund Size (Millions) Number of Holdings Portfolio Turnover $434 241 31.53% | |
| Holdings [Text Block] | Portfolio Holdings (as of 6/30/24) Top Ten Holdings (Based on Net Assets) * * Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any. Sector Allocation (Based on Net Assets) | |
| Updated Prospectus Web Address | im.bnymellon.com/literaturecenter | |
| BNY Mellon Active MidCap Fund | Class Y - DSGYX | ||
| Shareholder Report [Line Items] | ||
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info bnymellon.com. | |
| Additional Information [Text Block] | You can find additional information about the Fund at im.bnymellon.com/literaturecenter. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bnymellon.com. | |
| Additional Information Phone Number | 1-800-373-9387 | |
| Additional Information Email | info@bnymellon.com | |
| Additional Information Website | im.bnymellon.com/literaturecenter | |
| Expenses [Text Block] | What were the Fund’s costs for the last six months? (based on a hypothetical $10,000 investment) Share Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Y * $38 0.75% ** * During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. ** Annualized | |
| Expenses Paid, Amount | $ 38 | [7] |
| Expense Ratio, Percent | 0.75% | [7],[8] |
| Net Assets | $ 434,000,000 | |
| Holdings Count | 241 | |
| Portfolio Turnover | 31.53% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (AS OF 6/30/24) Fund Size (Millions) Number of Holdings Portfolio Turnover $434 241 31.53% | |
| Holdings [Text Block] | Portfolio Holdings (as of 6/30/24) Top Ten Holdings (Based on Net Assets) * * Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any. Sector Allocation (Based on Net Assets) | |
| Updated Prospectus Web Address | im.bnymellon.com/literaturecenter | |
| [1] During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund’s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher. Annualized | ||
| Shareholder Report, Holdings (Details) - BNY Mellon Active MidCap Fund | Jun. 30, 2024 |
| Class A - DSGAX | Constellation Energy Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Class A - DSGAX | Phillips 66 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Class A - DSGAX | Amphenol Corp., Cl. A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class A - DSGAX | T. Rowe Price Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class A - DSGAX | EMCOR Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class A - DSGAX | Loews Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class A - DSGAX | Agilent Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class A - DSGAX | Fifth Third Bancorp | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Class A - DSGAX | The Hartford Financial Services Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Class A - DSGAX | Jacobs Solutions, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class A - DSGAX | Net Other Assets and Liabilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.10%) |
| Class A - DSGAX | Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class A - DSGAX | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Class A - DSGAX | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class A - DSGAX | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class A - DSGAX | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Class A - DSGAX | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Class A - DSGAX | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Class A - DSGAX | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| Class A - DSGAX | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Class A - DSGAX | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Class A - DSGAX | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.80% |
| Class A - DSGAX | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| Class C - DSGCX | Constellation Energy Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Class C - DSGCX | Phillips 66 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Class C - DSGCX | Amphenol Corp., Cl. A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class C - DSGCX | T. Rowe Price Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class C - DSGCX | EMCOR Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class C - DSGCX | Loews Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class C - DSGCX | Agilent Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class C - DSGCX | Fifth Third Bancorp | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Class C - DSGCX | The Hartford Financial Services Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Class C - DSGCX | Jacobs Solutions, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class C - DSGCX | Net Other Assets and Liabilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.10%) |
| Class C - DSGCX | Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class C - DSGCX | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Class C - DSGCX | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class C - DSGCX | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class C - DSGCX | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Class C - DSGCX | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Class C - DSGCX | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Class C - DSGCX | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| Class C - DSGCX | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Class C - DSGCX | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Class C - DSGCX | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.80% |
| Class C - DSGCX | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| Class I - DSGIX | Constellation Energy Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Class I - DSGIX | Phillips 66 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Class I - DSGIX | Amphenol Corp., Cl. A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class I - DSGIX | T. Rowe Price Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class I - DSGIX | EMCOR Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class I - DSGIX | Loews Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class I - DSGIX | Agilent Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class I - DSGIX | Fifth Third Bancorp | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Class I - DSGIX | The Hartford Financial Services Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Class I - DSGIX | Jacobs Solutions, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class I - DSGIX | Net Other Assets and Liabilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.10%) |
| Class I - DSGIX | Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class I - DSGIX | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Class I - DSGIX | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class I - DSGIX | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class I - DSGIX | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Class I - DSGIX | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Class I - DSGIX | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Class I - DSGIX | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| Class I - DSGIX | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Class I - DSGIX | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Class I - DSGIX | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.80% |
| Class I - DSGIX | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| Class Y - DSGYX | Constellation Energy Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Class Y - DSGYX | Phillips 66 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Class Y - DSGYX | Amphenol Corp., Cl. A | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class Y - DSGYX | T. Rowe Price Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class Y - DSGYX | EMCOR Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Class Y - DSGYX | Loews Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class Y - DSGYX | Agilent Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Class Y - DSGYX | Fifth Third Bancorp | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Class Y - DSGYX | The Hartford Financial Services Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Class Y - DSGYX | Jacobs Solutions, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class Y - DSGYX | Net Other Assets and Liabilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.10%) |
| Class Y - DSGYX | Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Class Y - DSGYX | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Class Y - DSGYX | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class Y - DSGYX | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Class Y - DSGYX | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Class Y - DSGYX | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Class Y - DSGYX | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Class Y - DSGYX | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| Class Y - DSGYX | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Class Y - DSGYX | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Class Y - DSGYX | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.80% |
| Class Y - DSGYX | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
