v3.25.2
Shareholder Report
 6 Months Ended
Jun. 30, 2025
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, 2025
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, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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
$77
1.47%
Expenses Paid, Amount $ 77
Expense Ratio, Percent 1.47%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2025, the Gabelli Value 25 Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Value Index. The S&P 500's performance continued to be dominated by a narrow group of technology-enabled companies. However, the Fund overcame an underweight of these companies through exposure to more cyclical stocks that rose with a stronger economic outlook. Top contributors included Industrial and Financial Services companies; detractors included less cyclical Consumer Staples companies.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Value 25 Fund Inc. - Class AAA
S&P 500 Index
Russell 1000 Value Index
6/15
10,000
10,000
10,000
6/16
9,621
10,399
10,286
6/17
10,878
12,260
11,883
6/18
11,528
14,022
12,688
6/19
12,008
15,483
13,761
6/20
10,340
16,646
12,545
6/21
15,083
23,436
18,024
6/22
12,444
20,947
16,795
6/23
13,246
25,051
18,733
6/24
14,087
31,203
21,180
6/25
17,259
35,934
24,082
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Value 25 Fund Inc. - Class AAA
12.58%
22.52%
10.79%
5.61%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Value Index
6.00%
13.70%
13.93%
9.19%
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.
AssetsNet $ 218,545,080
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 999,019
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$218,545,080
  • Number of Portfolio Holdings80
  • Portfolio Turnover Rate2%
  • Management Fees$999,019
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
98.5%
U.S. Government Obligations
1.5%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Entertainment
16.6%
Financial Services
14.9%
Broadcasting
8.3%
Electronics
8.3%
Environmental Services
7.5%
Metals and Mining
7.0%
Diversified Industrial
6.5%
Energy and Utilities
6.5%
Other Industry sectors
24.4%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Sony Group Corp.
7.7%
The Bank of New York Mellon Corp.
6.8%
Newmont Corp.
6.6%
Republic Services Inc.
5.4%
National Fuel Gas Co.
5.2%
Paramount Global
5.0%
Crane Co.
4.8%
Madison Square Garden Sports Corp.
4.7%
American Express Co.
4.5%
Atlanta Braves Holdings Inc.
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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
$117
2.22%
Expenses Paid, Amount $ 117
Expense Ratio, Percent 2.22%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2025, the Gabelli Value 25 Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Value Index. The S&P 500's performance continued to be dominated by a narrow group of technology-enabled companies. However, the Fund overcame an underweight of these companies through exposure to more cyclical stocks that rose with a stronger economic outlook. Top contributors included Industrial and Financial Services companies; detractors included less cyclical Consumer Staples companies.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Value 25 Fund Inc. - Class C
The Gabelli Value 25 Fund Inc. - Class C (includes sales charge)
S&P 500 Index
Russell 1000 Value Index
6/15
10,000
10,000
10,000
10,000
6/16
9,552
9,457
10,399
10,286
6/17
10,713
10,511
12,260
11,883
6/18
11,266
10,949
14,022
12,688
6/19
11,647
11,210
15,483
13,761
6/20
9,958
9,489
16,646
12,545
6/21
14,426
13,652
23,436
18,024
6/22
11,802
11,057
20,947
16,795
6/23
12,484
11,585
25,051
18,733
6/24
13,177
12,112
31,203
21,180
6/25
16,042
14,624
35,934
24,082
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Value 25 Fund Inc. - Class C
12.23%
21.75%
10.01%
4.84%
The Gabelli Value 25 Fund Inc. - Class C (includes sales charge)
11.23%
20.75%
10.01%
4.84%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Value Index
6.00%
13.70%
13.93%
9.19%
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.
AssetsNet $ 218,545,080
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 999,019
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$218,545,080
  • Number of Portfolio Holdings80
  • Portfolio Turnover Rate2%
  • Management Fees$999,019
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
98.5%
U.S. Government Obligations
1.5%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Entertainment
16.6%
Financial Services
14.9%
Broadcasting
8.3%
Electronics
8.3%
Environmental Services
7.5%
Metals and Mining
7.0%
Diversified Industrial
6.5%
Energy and Utilities
6.5%
Other Industry sectors
24.4%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Sony Group Corp.
7.7%
The Bank of New York Mellon Corp.
6.8%
Newmont Corp.
6.6%
Republic Services Inc.
5.4%
National Fuel Gas Co.
5.2%
Paramount Global
5.0%
Crane Co.
4.8%
Madison Square Garden Sports Corp.
4.7%
American Express Co.
4.5%
Atlanta Braves Holdings Inc.
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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
$53
1.00%
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.00%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2025, the Gabelli Value 25 Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Value Index. The S&P 500's performance continued to be dominated by a narrow group of technology-enabled companies. However, the Fund overcame an underweight of these companies through exposure to more cyclical stocks that rose with a stronger economic outlook. Top contributors included Industrial and Financial Services companies; detractors included less cyclical Consumer Staples companies.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Value 25 Fund Inc. - Class I
S&P 500 Index
Russell 1000 Value Index
6/15
10,000
10,000
10,000
6/16
9,646
10,399
10,286
6/17
10,941
12,260
11,883
6/18
11,647
14,022
12,688
6/19
12,180
15,483
13,761
6/20
10,537
16,646
12,545
6/21
15,438
23,436
18,024
6/22
12,794
20,947
16,795
6/23
13,669
25,051
18,733
6/24
14,621
31,203
21,180
6/25
18,002
35,934
24,082
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Value 25 Fund Inc. - Class I
12.91%
23.13%
11.31%
6.06%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Value Index
6.00%
13.70%
13.93%
9.19%
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.
AssetsNet $ 218,545,080
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 999,019
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$218,545,080
  • Number of Portfolio Holdings80
  • Portfolio Turnover Rate2%
  • Management Fees$999,019
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
98.5%
U.S. Government Obligations
1.5%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Entertainment
16.6%
Financial Services
14.9%
Broadcasting
8.3%
Electronics
8.3%
Environmental Services
7.5%
Metals and Mining
7.0%
Diversified Industrial
6.5%
Energy and Utilities
6.5%
Other Industry sectors
24.4%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Sony Group Corp.
7.7%
The Bank of New York Mellon Corp.
6.8%
Newmont Corp.
6.6%
Republic Services Inc.
5.4%
National Fuel Gas Co.
5.2%
Paramount Global
5.0%
Crane Co.
4.8%
Madison Square Garden Sports Corp.
4.7%
American Express Co.
4.5%
Atlanta Braves Holdings Inc.
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</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
$77
1.47%
Expenses Paid, Amount $ 77
Expense Ratio, Percent 1.47%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2025, the Gabelli Value 25 Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Value Index. The S&P 500's performance continued to be dominated by a narrow group of technology-enabled companies. However, the Fund overcame an underweight of these companies through exposure to more cyclical stocks that rose with a stronger economic outlook. Top contributors included Industrial and Financial Services companies; detractors included less cyclical Consumer Staples companies.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Value 25 Fund Inc. - Class A
The Gabelli Value 25 Fund Inc. - Class A (includes sales charge)
S&P 500 Index
Russell 1000 Value Index
6/15
10,000
10,000
10,000
10,000
6/16
9,621
9,068
10,399
10,286
6/17
10,874
9,659
12,260
11,883
6/18
11,526
9,650
14,022
12,688
6/19
11,998
9,467
15,483
13,761
6/20
10,344
7,693
16,646
12,545
6/21
15,082
10,571
23,436
18,024
6/22
12,448
8,223
20,947
16,795
6/23
13,245
8,247
25,051
18,733
6/24
14,079
8,262
31,203
21,180
6/25
17,257
9,545
35,934
24,082
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Value 25 Fund Inc. - Class A
12.61%
22.57%
10.78%
5.61%
The Gabelli Value 25 Fund Inc. - Class A (includes sales charge)
6.14%
15.53%
9.47%
4.98%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Value Index
6.00%
13.70%
13.93%
9.19%
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.
AssetsNet $ 218,545,080
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 999,019
InvestmentCompanyPortfolioTurnover 2.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$218,545,080
  • Number of Portfolio Holdings80
  • Portfolio Turnover Rate2%
  • Management Fees$999,019
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
98.5%
U.S. Government Obligations
1.5%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Entertainment
16.6%
Financial Services
14.9%
Broadcasting
8.3%
Electronics
8.3%
Environmental Services
7.5%
Metals and Mining
7.0%
Diversified Industrial
6.5%
Energy and Utilities
6.5%
Other Industry sectors
24.4%
Other Assets and Liabilities (Net)Footnote Reference*
(0.0)%
FootnoteDescription
Footnote*
Amount represents greater than (0.05)%.
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Sony Group Corp.
7.7%
The Bank of New York Mellon Corp.
6.8%
Newmont Corp.
6.6%
Republic Services Inc.
5.4%
National Fuel Gas Co.
5.2%
Paramount Global
5.0%
Crane Co.
4.8%
Madison Square Garden Sports Corp.
4.7%
American Express Co.
4.5%
Atlanta Braves Holdings Inc.
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address <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; text-align-last: left; white-space-collapse: preserve-breaks;">www.gabelli.com/funds/open_ends</span>