Form N-CSR Cover
| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Gabelli Value 25 Fund Inc |
| Entity Central Index Key | 0000853438 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
Shareholder Report
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Gabelli Value 25 Fund Inc |
| Entity Central Index Key | 0000853438 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000088645 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Value 25 Fund Inc. |
| Class Name | Class AAA |
| Trading Symbol | GVCAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.gabelli.com |
| Additional Information Phone Number | 800-GABELLI (800-422-3554) |
| Additional Information Website | www.gabelli.com</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| 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 $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class AAA $75 1.49% |
| Expenses Paid, Amount | $ 75 |
| Expense Ratio, Percent | 1.49% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Value 25 Fund Inc. - Class AAA S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,941 10,742 10,413 6/16 9,564 11,171 10,711 6/17 10,813 13,170 12,374 6/18 11,460 15,063 13,212 6/19 11,937 16,632 14,330 6/20 10,279 17,881 13,063 6/21 14,992 25,175 18,769 6/22 12,369 22,501 17,489 6/23 13,167 26,910 19,507 6/24 14,002 33,519 22,055 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class AAA 3.07% 6.35% 3.24% 3.43% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Updated Performance Information Location [Text Block] | Updated Location: Visit www.confluence.com/funds for more recent performance information. |
| AssetsNet | $ 206,747,245 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,016,075 |
| InvestmentCompanyPortfolioTurnover | 3% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 800-GABELLI (800-422-3554) |
| Updated Prospectus Email Address | info@gabelli.com</span>" id="sjs-B39"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span> |
| Updated Prospectus Web Address | www.gabelli.com</span>" id="sjs-B40"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| C000002904 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Value 25 Fund Inc. |
| Class Name | Class C |
| Trading Symbol | GVCCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.gabelli.com |
| Additional Information Phone Number | 800-GABELLI (800-422-3554) |
| Additional Information Website | www.gabelli.com</span>" id="sjs-B50"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| 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 $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class C $113 2.24% |
| Expenses Paid, Amount | $ 113 |
| Expense Ratio, Percent | 2.24% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Value 25 Fund Inc. - Class C S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,773 10,742 10,413 6/16 9,242 11,171 10,711 6/17 10,273 13,170 12,374 6/18 10,701 15,063 13,212 6/19 10,956 16,632 14,330 6/20 9,273 17,881 13,063 6/21 13,341 25,175 18,769 6/22 10,805 22,501 17,489 6/23 11,322 26,910 19,507 6/24 11,837 33,519 22,055 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class C 1.71% 4.55% 2.50% 2.66% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Updated Performance Information Location [Text Block] | Updated Location: Visit www.confluence.com/funds for more recent performance information. |
| AssetsNet | $ 206,747,245 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,016,075 |
| InvestmentCompanyPortfolioTurnover | 3% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 800-GABELLI (800-422-3554) |
| Updated Prospectus Email Address | info@gabelli.com</span>" id="sjs-B70"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span> |
| Updated Prospectus Web Address | www.gabelli.com</span>" id="sjs-B71"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| C000034316 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Value 25 Fund Inc. |
| Class Name | Class I |
| Trading Symbol | GVCIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.gabelli.com |
| Additional Information Phone Number | 800-GABELLI (800-422-3554) |
| Additional Information Website | www.gabelli.com</span>" id="sjs-B81"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| 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 $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class I $51 1.00% |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 1% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Value 25 Fund Inc. - Class I S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,967 10,742 10,413 6/16 9,614 11,171 10,711 6/17 10,905 13,170 12,374 6/18 11,608 15,063 13,212 6/19 12,139 16,632 14,330 6/20 10,502 17,881 13,063 6/21 15,386 25,175 18,769 6/22 12,750 22,501 17,489 6/23 13,623 26,910 19,507 6/24 14,571 33,519 22,055 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class I 3.28% 6.96% 3.72% 3.84% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Updated Performance Information Location [Text Block] | Updated Location: Visit www.confluence.com/funds for more recent performance information. |
| AssetsNet | $ 206,747,245 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,016,075 |
| InvestmentCompanyPortfolioTurnover | 3% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 800-GABELLI (800-422-3554) |
| Updated Prospectus Email Address | info@gabelli.com</span>" id="sjs-B101"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span> |
| Updated Prospectus Web Address | www.gabelli.com</span>" id="sjs-B102"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| C000002902 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Value 25 Fund Inc. |
| Class Name | Class A |
| Trading Symbol | GABVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Value 25 Fund Inc. (the Fund) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.gabelli.com |
| Additional Information Phone Number | 800-GABELLI (800-422-3554) |
| Additional Information Website | www.gabelli.com</span>" id="sjs-B112"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| 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 $10k Investment Costs Paid as a % of a $10k Investment The Gabelli Value 25 Fund Inc. - Class A $75 1.49% |
| Expenses Paid, Amount | $ 75 |
| Expense Ratio, Percent | 1.49% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Value 25 Fund underperformed its broad-based benchmark, the S&P 500. The S&P 500’s record performance has primarily been driven by a concentrated group of technology-enabled growth stocks. Our Fund, in comparison, focuses on companies that appear underpriced relative to their private market value (PMV). During the first half of the year, the top contributors to our Fund consisted of companies with strong balance sheets and disciplined capital allocations histories. First half detractors included companies adversely impacted by changes in consumer behavior and individual corporate developments. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Value 25 Fund Inc. - Class A S&P 500 Index Russell 1000 Value Index 6/14 10,000 10,000 10,000 6/15 9,374 10,742 10,413 6/16 9,569 11,171 10,711 6/17 10,815 13,170 12,374 6/18 11,464 15,063 13,212 6/19 11,933 16,632 14,330 6/20 10,287 17,881 13,063 6/21 15,000 25,175 18,769 6/22 12,379 22,501 17,489 6/23 13,172 26,910 19,507 6/24 14,001 33,519 22,055 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Value 25 Fund Inc. - Class A (2.98)% 0.18% 2.03% 2.81% S&P 500 Index 15.29% 24.56% 15.05% 12.86% Russell 1000 Value Index 6.62% 13.06% 9.01% 8.23% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on fund distributions or the redemption of fund shares. |
| Performance Table Market Index Changed [Text Block] | |
| Updated Performance Information Location [Text Block] | Updated Location: Visit www.confluence.com/funds for more recent performance information. |
| AssetsNet | $ 206,747,245 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,016,075 |
| InvestmentCompanyPortfolioTurnover | 3% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $206,747,245 Number of Portfolio Holdings 72 Portfolio Turnover Rate 3% Management Fees $1,016,075 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Entertainment 16.0% Financial Services 14.6% Environmental Services 7.9% Electronics 7.5% Broadcasting 7.1% Energy and Utilities 6.5% Diversified Industrial 5.9% Metals and Mining 5.8% Other Industry sectors 28.7% Other Assets and Liabilities (Net) 0.0% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Sony Group Corp. 6.7% American Express Co. 6.2% Republic Services Inc. 5.5% Newmont Corp. 5.3% The Bank of New York Mellon Corp. 5.3% Madison Square Garden Sports Corp. 4.9% Crane Co. 4.5% Paramount Global 4.3% Genuine Parts Co. 4.0% National Fuel Gas Co. 3.9% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 800-GABELLI (800-422-3554) |
| Updated Prospectus Email Address | info@gabelli.com</span>" id="sjs-B132"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span> |
| Updated Prospectus Web Address | www.gabelli.com</span>" id="sjs-B133"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
Shareholder Report, Line Graph
| Shareholder Report, Line Graph (Details) - USD ($) | 6 Months Ended | ||||||||||
| Jun. 30, 2014 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | |
| C000088645 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class AAA | ||||||||||
| C000002904 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class C | ||||||||||
| C000034316 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class I | ||||||||||
| C000002902 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class A | ||||||||||
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Account Value | $ 10,000 | $ 33,519 | $ 26,910 | $ 22,501 | $ 25,175 | $ 17,881 | $ 16,632 | $ 15,063 | $ 13,170 | $ 11,171 | $ 10,742 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Account Value | 10,000 | 33,519 | 26,910 | 22,501 | 25,175 | 17,881 | 16,632 | 15,063 | 13,170 | 11,171 | 10,742 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Account Value | 10,000 | 33,519 | 26,910 | 22,501 | 25,175 | 17,881 | 16,632 | 15,063 | 13,170 | 11,171 | 10,742 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Account Value | $ 10,000 | $ 33,519 | $ 26,910 | $ 22,501 | $ 25,175 | $ 17,881 | $ 16,632 | $ 15,063 | $ 13,170 | $ 11,171 | $ 10,742 |
Shareholder Report, Average Ann
| Shareholder Report, Average Annual Return (Details) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended | |
| Jun. 30, 2024 | Jun. 30, 2014 | Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2024 | |
| C000088645 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class AAA | ||||
| C000002904 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class C | ||||
| Average Annual Return, Percent | 1.71% | 4.55% | 2.50% | 2.66% | |
| C000034316 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class I | ||||
| C000002902 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Value 25 Fund Inc. - Class A | ||||
| Average Annual Return, Percent | (2.98%) | 0.18% | 2.03% | 2.81% | |
| Without Sales Load [Member] | C000088645 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 3.07% | 6.35% | 3.24% | 3.43% | |
| Without Sales Load [Member] | C000034316 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 3.28% | 6.96% | 3.72% | 3.84% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 15.29% | 24.56% | 15.05% | 12.86% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 15.29% | 24.56% | 15.05% | 12.86% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 15.29% | 24.56% | 15.05% | 12.86% | |
| S&P 500 Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 15.29% | 24.56% | 15.05% | 12.86% | |
| Russell 1000 Value Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.62% | 13.06% | 9.01% | 8.23% | |
| Russell 1000 Value Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.62% | 13.06% | 9.01% | 8.23% | |
| Russell 1000 Value Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.62% | 13.06% | 9.01% | 8.23% | |
| Russell 1000 Value Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.62% | 13.06% | 9.01% | 8.23% | |
Shareholder Report, Holdings (D
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000088645 | Sony Group Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000088645 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000088645 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000088645 | Newmont Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000088645 | The Bank of New York Mellon Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000088645 | Madison Square Garden Sports Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000088645 | Crane Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000088645 | Paramount Global | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000088645 | Genuine Parts Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000088645 | National Fuel Gas Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000088645 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.10% |
| C000088645 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000088645 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000088645 | Entertainment | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000088645 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.60% |
| C000088645 | Environmental Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000088645 | Electronics | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000088645 | Broadcasting | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000088645 | Energy and Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000088645 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000088645 | Metals and Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000088645 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.70% |
| C000088645 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000002904 | Sony Group Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000002904 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000002904 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000002904 | Newmont Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000002904 | The Bank of New York Mellon Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000002904 | Madison Square Garden Sports Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000002904 | Crane Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000002904 | Paramount Global | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000002904 | Genuine Parts Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000002904 | National Fuel Gas Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000002904 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.10% |
| C000002904 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000002904 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000002904 | Entertainment | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000002904 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.60% |
| C000002904 | Environmental Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000002904 | Electronics | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000002904 | Broadcasting | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000002904 | Energy and Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000002904 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000002904 | Metals and Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000002904 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.70% |
| C000002904 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000034316 | Sony Group Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000034316 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000034316 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000034316 | Newmont Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000034316 | The Bank of New York Mellon Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000034316 | Madison Square Garden Sports Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000034316 | Crane Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000034316 | Paramount Global | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000034316 | Genuine Parts Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000034316 | National Fuel Gas Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000034316 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.10% |
| C000034316 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000034316 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000034316 | Entertainment | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000034316 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.60% |
| C000034316 | Environmental Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000034316 | Electronics | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000034316 | Broadcasting | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000034316 | Energy and Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000034316 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000034316 | Metals and Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000034316 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.70% |
| C000034316 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000002902 | Sony Group Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000002902 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000002902 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000002902 | Newmont Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000002902 | The Bank of New York Mellon Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000002902 | Madison Square Garden Sports Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000002902 | Crane Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000002902 | Paramount Global | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000002902 | Genuine Parts Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000002902 | National Fuel Gas Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000002902 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.10% |
| C000002902 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000002902 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000002902 | Entertainment | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000002902 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.60% |
| C000002902 | Environmental Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000002902 | Electronics | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000002902 | Broadcasting | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000002902 | Energy and Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000002902 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000002902 | Metals and Mining | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000002902 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.70% |
| C000002902 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |