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Shareholder Report
 12 Months Ended
Dec. 31, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name BNY Mellon Strategic Funds, Inc.
Entity Central Index Key 0000737520
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2024
C000000137 [Member]  
Shareholder Report [Line Items]  
Fund Name BNY Mellon Active Midcap Fund
Class Name Class A
Trading Symbol DNLDX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to December 31, 2024.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at bny.com/investments/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@bny.com.
Additional Information Phone Number 1-800-373-9387
Additional Information Email info@bny.com
Additional Information Website bny.com/investments/literaturecenter
Expenses [Text Block]
What were the Fund’s costs for the last year ?
(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* $106 0.99%
*
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.
Expenses Paid, Amount $ 106 [1]
Expense Ratio, Percent 0.99% [1]
Factors Affecting Performance [Text Block]
How did the Fund perform last year ?
  • For the 12-month period ended December 31, 2024, the Fund’s Class A shares returned 14.78%.
  • In comparison, the Russell Midcap® Index (the “Index”) returned 15.34% for the same period.
What affected the Fund’s performance?
  • U.S. stocks rose as investors rewarded high-growth-oriented companies, including companies with exposure to artificial intelligence investment themes. Index performance was stronger in financials and weaker in health care.
  • Stock selection in the information technology, consumer staples and industrials sectors contributed to the Fund’s performance relative to the Index.
  • Stock selection in the energy and financials sectors detracted most from relative performance.
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2014 through December 31, 2024
Initial Investment of $10,000
Fund Performance - Growth of 10K Chart
The above graph compares a hypothetical $10,000 investment in the Fund’s Class A shares to a hypothetical investment of $10,000 made in each of the Russell 3000® Index (a broad-based index) and Russell Midcap® Index on 12/31/2014. The performance shown takes into account the maximum initial sales charge on Class A shares and applicable fees and expenses of the Fund, including management fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the indexes are not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/24 )
Class A Shares 1YR 5YR 10YR
with Maximum Sales Charge - 5.75% 8.17% 8.47% 6.86%
without Sales Charge 14.78% 9.76% 7.50%
Russell 3000® Index (broad-based index)* 23.81% 13.86% 12.55%
Russell Midcap® Index 15.34% 9.92% 9.63%
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Performance Table Market Index Changed [Text Block] In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Updated Performance Information Location [Text Block] For more current information visit bny.com/investments/literaturecenter .
Net Assets $ 457,000,000
Holdings Count | Holding 237
Advisory Fees Paid, Amount $ 2,997,238
Investment Company Portfolio Turnover 51.78%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (AS OF 12/31/24 )

Fund Size (Millions)
Number of Holdings		 Total Advisory Fee Paid During
Period
Annual Portfolio Turnover
$457 237 $2,997,238 51.78%
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Holdings [Text Block]
Portfolio Holdings (as of 12/31/24 )
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* 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)
Graphical Representation - Allocation 1 Chart
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Largest Holdings [Text Block]
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
C000000139 [Member]  
Shareholder Report [Line Items]  
Fund Name BNY Mellon Active Midcap Fund
Class Name Class C
Trading Symbol DNLCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to December 31, 2024.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at bny.com/investments/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@bny.com.
Additional Information Phone Number 1-800-373-9387
Additional Information Email info@bny.com
Additional Information Website bny.com/investments/literaturecenter
Expenses [Text Block]
What were the Fund’s costs for the last year ?
(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* $186 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.
Expenses Paid, Amount $ 186 [2]
Expense Ratio, Percent 1.74% [2]
Factors Affecting Performance [Text Block]
How did the Fund perform last year ?
  • For the 12-month period ended December 31, 2024, the Fund’s Class C shares returned 13.93%.
  • In comparison, the Russell Midcap® Index (the “Index”) returned 15.34% for the same period.
What affected the Fund’s performance?
  • U.S. stocks rose as investors rewarded high-growth-oriented companies, including companies with exposure to artificial intelligence investment themes. Index performance was stronger in financials and weaker in health care.
  • Stock selection in the information technology, consumer staples and industrials sectors contributed to the Fund’s performance relative to the Index.
  • Stock selection in the energy and financials sectors detracted most from relative performance.
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2014 through December 31, 2024
Initial Investment of $10,000
Fund Performance - Growth of 10K Chart
The above graph compares a hypothetical $10,000 investment in the Fund’s Class C shares to a hypothetical investment of $10,000 made in each of the Russell 3000® Index (a broad-based index) and Russell Midcap® Index on 12/31/2014. The performance shown takes into account the maximum deferred sales charge on Class C shares and applicable fees and expenses of the Fund, including management fees, 12b-1 fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the indexes are not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
*In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/24 )
Class C Shares 1YR 5YR 10YR
with Maximum Deferred Sales Charge - 1.00% 12.93%
​**
 8.86% 6.60%
without Deferred Sales Charge 13.93% 8.86% 6.60%
Russell 3000® Index (broad-based index)* 23.81% 13.86% 12.55%
Russell Midcap® Index 15.34% 9.92% 9.63%
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
**
The maximum contingent deferred sales charge for Class C shares is 1.00% for shares redeemed within one year of the date purchased.
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Performance Table Market Index Changed [Text Block] In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Updated Performance Information Location [Text Block] For more current information visit bny.com/investments/literaturecenter . 
Net Assets $ 457,000,000
Holdings Count | Holding 237
Advisory Fees Paid, Amount $ 2,997,238
Investment Company Portfolio Turnover 51.78%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (AS OF 12/31/24 )

Fund Size (Millions)
Number of Holdings		 Total Advisory Fee Paid During
Period
Annual Portfolio Turnover
$457 237 $2,997,238 51.78%
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Holdings [Text Block]
Portfolio Holdings (as of 12/31/24 )
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* 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)
Graphical Representation - Allocation 1 Chart
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Largest Holdings [Text Block]
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
C000000140 [Member]  
Shareholder Report [Line Items]  
Fund Name BNY Mellon Active Midcap Fund
Class Name Class I
Trading Symbol DNLRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to December 31, 2024.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at bny.com/investments/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@bny.com.
Additional Information Phone Number 1-800-373-9387
Additional Information Email info@bny.com
Additional Information Website bny.com/investments/literaturecenter
Expenses [Text Block]
What were the Fund’s costs for the last year ?
(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* $80 0.74%
*
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.
Expenses Paid, Amount $ 80 [3]
Expense Ratio, Percent 0.74% [3]
Factors Affecting Performance [Text Block]
How did the Fund perform last year ?
  • For the 12-month period ended December 31, 2024, the Fund’s Class I shares returned 15.08%.
  • In comparison, the Russell Midcap® Index (the “Index”) returned 15.34% for the same period.
What affected the Fund’s performance?
  • U.S. stocks rose as investors rewarded high-growth-oriented companies, including companies with exposure to artificial intelligence investment themes. Index performance was stronger in financials and weaker in health care.
  • Stock selection in the information technology, consumer staples and industrials sectors contributed to the Fund’s performance relative to the Index.
  • Stock selection in the energy and financials sectors detracted most from relative performance.
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2014 through December 31, 2024
Initial Investment of $10,000
Fund Performance - Growth of 10K Chart
The above graph compares a hypothetical $10,000 investment in the Fund’s Class I shares to a hypothetical investment of $10,000 made in each of the Russell 3000® Index (a broad-based index) and Russell Midcap® Index on 12/31/2014. The performance shown takes into account applicable fees and expenses of the Fund, including management fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the indexes are not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/24 )
Share Class 1YR 5YR 10YR
Class I 15.08% 10.01% 7.73%
Russell 3000® Index (broad-based index)* 23.81% 13.86% 12.55%
Russell Midcap® Index 15.34% 9.92% 9.63%
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Performance Table Market Index Changed [Text Block] In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Updated Performance Information Location [Text Block] For more current information visit bny.com/investments/literaturecenter .
Net Assets $ 457,000,000
Holdings Count | Holding 237
Advisory Fees Paid, Amount $ 2,997,238
Investment Company Portfolio Turnover 51.78%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (AS OF 12/31/24 )

Fund Size (Millions)
Number of Holdings		 Total Advisory Fee Paid During
Period
Annual Portfolio Turnover
$457 237 $2,997,238 51.78%
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Holdings [Text Block]
Portfolio Holdings (as of 12/31/24 )
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* 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)
Graphical Representation - Allocation 1 Chart
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Largest Holdings [Text Block]
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
C000162280 [Member]  
Shareholder Report [Line Items]  
Fund Name BNY Mellon Active Midcap Fund
Class Name Class Y
Trading Symbol DNLYX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BNY Mellon Active MidCap Fund (the “Fund”) for the period of January 1, 2024 to December 31, 2024.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at bny.com/investments/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@bny.com.
Additional Information Phone Number 1-800-373-9387
Additional Information Email info@bny.com
Additional Information Website bny.com/investments/literaturecenter
Expenses [Text Block]
What were the Fund’s costs for the last year ?
(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* $82 0.76%
*
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.
Expenses Paid, Amount $ 82 [4]
Expense Ratio, Percent 0.76% [4]
Factors Affecting Performance [Text Block]
How did the Fund perform last year ?
  • For the 12-month period ended December 31, 2024, the Fund’s Class Y shares returned 15.06%.
  • In comparison, the Russell Midcap® Index (the “Index”) returned 15.34% for the same period.
What affected the Fund’s performance?
  • U.S. stocks rose as investors rewarded high-growth-oriented companies, including companies with exposure to artificial intelligence investment themes. Index performance was stronger in financials and weaker in health care.
  • Stock selection in the information technology, consumer staples and industrials sectors contributed to the Fund’s performance relative to the Index.
  • Stock selection in the energy and financials sectors detracted most from relative performance.
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How did the Fund perform over the past 10 years?
The Fund’s past performance is not a good predictor of the Fund’s future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Cumulative Performance from January 1 , 2014 through December 31, 2024
Initial Investment of $1,000,000
Fund Performance - Growth of 10K Chart
The above graph compares a hypothetical $1,000,000 investment in the Fund’s Class Y shares to a hypothetical investment of $1,000,000 made in each of the Russell 3000® Index (a broad-based index) and Russell Midcap® Index on 12/31/2014. The performance shown takes into account applicable fees and expenses of the Fund, including management fees and other expenses. The Fund’s performance also assumes the reinvestment of dividends and capital gains. Unlike the Fund, the indexes are not subject to charges, fees and other expenses. Investors cannot invest directly in any index.
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (AS OF 12/31/24 )
Share Class 1YR 5YR 10YR
Class Y 15.06% 10.10% 7.79%
Russell 3000® Index (broad-based index)* 23.81% 13.86% 12.55%
Russell Midcap® Index 15.34% 9.92% 9.63%
*
In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Performance Table Market Index Changed [Text Block] In accordance with regulatory changes requiring the Fund’s primary benchmark to represent the overall applicable market, the Fund’s primary prospectus benchmark changed to the indicated benchmark effective as of December 31, 2024.
Updated Performance Information Location [Text Block] For more current information visit bny.com/investments/literaturecenter .
Net Assets $ 457,000,000
Holdings Count | Holding 237
Advisory Fees Paid, Amount $ 2,997,238
Investment Company Portfolio Turnover 51.78%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (AS OF 12/31/24 )

Fund Size (Millions)
Number of Holdings		 Total Advisory Fee Paid During
Period
Annual Portfolio Turnover
$457 237 $2,997,238 51.78%
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Holdings [Text Block]
Portfolio Holdings (as of 12/31/24 )
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* 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)
Graphical Representation - Allocation 1 Chart
Not FDIC Insured. Not Bank-Guaranteed. May Lose Value
Largest Holdings [Text Block]
Top Ten Holdings (Based on Net Assets) *
Graphical Representation - Top N Holdings Chart
* Excludes money market funds or other short-term securities held for the investment of cash and cash collateral for securities loaned, if any.
[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.
[2] 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.
[3] 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.
[4] 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.