| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Gabelli Dividend Growth Fund |
| Entity Central Index Key | 0001086884 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Gabelli Dividend Growth Fund |
| Entity Central Index Key | 0001086884 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000002889 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Dividend Growth Fund |
| Class Name | Class AAA |
| Trading Symbol | GABBX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Dividend Growth Fund (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 Dividend Growth Fund - Class AAA $102 2.01% |
| Expenses Paid, Amount | $ 102 |
| Expense Ratio, Percent | 2.01% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Dividend Growth Fund underperformed its broad-based benchmark, S&P 500 and its comparatives, the Lipper Large Cap Value Fund Index and the MSCI USA High Dividend Yield Index. The Fund focuses on owning solid, well-managed businesses trading at compelling valuations, often with a catalyst, and with diversification across sectors. During the period, the Fund’s performance was negatively impacted by specific healthcare holdings. The Fund was overweight communication services and consumer staples, and underweight consumer discretionary and real estate. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Dividend Growth Fund - Class AAA S&P 500 Index MSCI USA High Dividend Yield Index Lipper Large Cap Value Fund Index 6/14 10,000 10,000 10,000 10,000 6/15 10,064 10,742 10,327 10,389 6/16 9,378 11,171 11,840 10,424 6/17 10,962 13,170 13,389 12,299 6/18 11,510 15,063 14,685 13,436 6/19 12,223 16,632 16,320 14,425 6/20 11,412 17,881 15,743 13,580 6/21 16,162 25,175 20,251 19,581 6/22 14,189 22,501 20,081 18,098 6/23 15,568 26,910 21,356 20,621 6/24 16,912 33,519 24,069 24,523 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Dividend Growth Fund - Class AAA 4.92% 8.63% 6.71% 5.39% S&P 500 Index 15.29% 24.56% 15.05% 12.86% MSCI USA High Dividend Yield Index 6.27% 12.70% 8.08% 9.18% Lipper Large Cap Value Fund Index 10.31% 18.92% 11.20% 9.38% |
| 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 | $ 18,387,580 |
| Holdings Count | Holding | 62 |
| Advisory Fees Paid, Amount | $ 19,050 |
| InvestmentCompanyPortfolioTurnover | 8% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $18,387,580 Number of Portfolio Holdings 62 Portfolio Turnover Rate 8% Management Fees $19,050 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Financial Services 18.4% Computer Software and Services 11.9% Health Care 10.9% Food and Beverage 9.0% Diversified Industrial 8.0% Energy 5.6% U.S. Government Obligations 4.7% Business Services 3.8% Other Industry sectors 28.2% Other Assets and Liabilities (Net) (0.5)% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Alphabet Inc. 4.8% Merck & Co. Inc. 4.0% American Express Co. 3.8% T-Mobile US Inc. 3.5% Mondelez International Inc. 3.2% Citigroup Inc. 3.1% JPMorgan Chase & Co. 2.8% DuPont de Nemours Inc. 2.6% Republic Services Inc. 2.5% Microsoft Corp. 2.4% |
| 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> |
| C000002891 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Dividend Growth Fund |
| Class Name | Class C |
| Trading Symbol | GBCCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Dividend Growth Fund (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 Dividend Growth Fund - Class C $140 2.76% |
| Expenses Paid, Amount | $ 140 |
| Expense Ratio, Percent | 2.76% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Dividend Growth Fund underperformed its broad-based benchmark, S&P 500 and its comparatives, the Lipper Large Cap Value Fund Index and the MSCI USA High Dividend Yield Index. The Fund focuses on owning solid, well-managed businesses trading at compelling valuations, often with a catalyst, and with diversification across sectors. During the period, the Fund’s performance was negatively impacted by specific healthcare holdings. The Fund was overweight communication services and consumer staples, and underweight consumer discretionary and real estate. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Dividend Growth Fund - Class C S&P 500 Index MSCI USA High Dividend Yield Index Lipper Large Cap Value Fund Index 6/14 10,000 10,000 10,000 10,000 6/15 9,887 10,742 10,327 10,389 6/16 9,048 11,171 11,840 10,424 6/17 10,411 13,170 13,389 12,299 6/18 10,747 15,063 14,685 13,436 6/19 11,217 16,632 16,320 14,425 6/20 10,292 17,881 15,743 13,580 6/21 14,361 25,175 20,251 19,581 6/22 12,389 22,501 20,081 18,098 6/23 13,370 26,910 21,356 20,621 6/24 14,284 33,519 24,069 24,523 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Dividend Growth Fund - Class C 0.04% 6.83% 5.92% 4.61% S&P 500 Index 15.29% 24.56% 15.05% 12.86% MSCI USA High Dividend Yield Index 6.27% 12.70% 8.08% 9.18% Lipper Large Cap Value Fund Index 10.31% 18.92% 11.20% 9.38% |
| 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 | $ 18,387,580 |
| Holdings Count | Holding | 62 |
| Advisory Fees Paid, Amount | $ 19,050 |
| InvestmentCompanyPortfolioTurnover | 8% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $18,387,580 Number of Portfolio Holdings 62 Portfolio Turnover Rate 8% Management Fees $19,050 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Financial Services 18.4% Computer Software and Services 11.9% Health Care 10.9% Food and Beverage 9.0% Diversified Industrial 8.0% Energy 5.6% U.S. Government Obligations 4.7% Business Services 3.8% Other Industry sectors 28.2% Other Assets and Liabilities (Net) (0.5)% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Alphabet Inc. 4.8% Merck & Co. Inc. 4.0% American Express Co. 3.8% T-Mobile US Inc. 3.5% Mondelez International Inc. 3.2% Citigroup Inc. 3.1% JPMorgan Chase & Co. 2.8% DuPont de Nemours Inc. 2.6% Republic Services Inc. 2.5% Microsoft Corp. 2.4% |
| 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> |
| C000002887 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Dividend Growth Fund |
| Class Name | Class I |
| Trading Symbol | GBCIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Dividend Growth Fund (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 Dividend Growth Fund - Class I $52 1.01% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 1.01% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Dividend Growth Fund underperformed its broad-based benchmark, S&P 500 and its comparatives, the Lipper Large Cap Value Fund Index and the MSCI USA High Dividend Yield Index. The Fund focuses on owning solid, well-managed businesses trading at compelling valuations, often with a catalyst, and with diversification across sectors. During the period, the Fund’s performance was negatively impacted by specific healthcare holdings. The Fund was overweight communication services and consumer staples, and underweight consumer discretionary and real estate. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Dividend Growth Fund - Class I S&P 500 Index MSCI USA High Dividend Yield Index Lipper Large Cap Value Fund Index 6/14 10,000 10,000 10,000 10,000 6/15 10,085 10,742 10,327 10,389 6/16 9,420 11,171 11,840 10,424 6/17 11,097 13,170 13,389 12,299 6/18 11,774 15,063 14,685 13,436 6/19 12,634 16,632 16,320 14,425 6/20 11,906 17,881 15,743 13,580 6/21 17,037 25,175 20,251 19,581 6/22 15,107 22,501 20,081 18,098 6/23 16,746 26,910 21,356 20,621 6/24 18,382 33,519 24,069 24,523 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Dividend Growth Fund - Class I 5.46% 9.77% 7.79% 6.28% S&P 500 Index 15.29% 24.56% 15.05% 12.86% MSCI USA High Dividend Yield Index 6.27% 12.70% 8.08% 9.18% Lipper Large Cap Value Fund Index 10.31% 18.92% 11.20% 9.38% |
| 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 | $ 18,387,580 |
| Holdings Count | Holding | 62 |
| Advisory Fees Paid, Amount | $ 19,050 |
| InvestmentCompanyPortfolioTurnover | 8% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $18,387,580 Number of Portfolio Holdings 62 Portfolio Turnover Rate 8% Management Fees $19,050 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Financial Services 18.4% Computer Software and Services 11.9% Health Care 10.9% Food and Beverage 9.0% Diversified Industrial 8.0% Energy 5.6% U.S. Government Obligations 4.7% Business Services 3.8% Other Industry sectors 28.2% Other Assets and Liabilities (Net) (0.5)% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Alphabet Inc. 4.8% Merck & Co. Inc. 4.0% American Express Co. 3.8% T-Mobile US Inc. 3.5% Mondelez International Inc. 3.2% Citigroup Inc. 3.1% JPMorgan Chase & Co. 2.8% DuPont de Nemours Inc. 2.6% Republic Services Inc. 2.5% Microsoft Corp. 2.4% |
| 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> |
| C000002888 | |
| Shareholder Report [Line Items] | |
| Fund Name | The Gabelli Dividend Growth Fund |
| Class Name | Class A |
| Trading Symbol | GBCAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about The Gabelli Dividend Growth Fund (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 Dividend Growth Fund - Class A $102 2.01% |
| Expenses Paid, Amount | $ 102 |
| Expense Ratio, Percent | 2.01% |
| Factors Affecting Performance [Text Block] | How did the Fund perform? During the six months ended June 30, 2024, the Gabelli Dividend Growth Fund underperformed its broad-based benchmark, S&P 500 and its comparatives, the Lipper Large Cap Value Fund Index and the MSCI USA High Dividend Yield Index. The Fund focuses on owning solid, well-managed businesses trading at compelling valuations, often with a catalyst, and with diversification across sectors. During the period, the Fund’s performance was negatively impacted by specific healthcare holdings. The Fund was overweight communication services and consumer staples, and underweight consumer discretionary and real estate. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| Line Graph [Table Text Block] | The Gabelli Dividend Growth Fund - Class A S&P 500 Index MSCI USA High Dividend Yield Index Lipper Large Cap Value Fund Index 6/14 10,000 10,000 10,000 10,000 6/15 9,483 10,742 10,327 10,389 6/16 9,379 11,171 11,840 10,424 6/17 10,961 13,170 13,389 12,299 6/18 11,511 15,063 14,685 13,436 6/19 12,226 16,632 16,320 14,425 6/20 11,407 17,881 15,743 13,580 6/21 16,156 25,175 20,251 19,581 6/22 14,185 22,501 20,081 18,098 6/23 15,568 26,910 21,356 20,621 6/24 16,913 33,519 24,069 24,523 |
| Average Annual Return [Table Text Block] | Fund 6 months 1 Year 5 Year 10 Year The Gabelli Dividend Growth Fund - Class A (0.01)% 2.40% 5.45% 4.77% S&P 500 Index 15.29% 24.56% 15.05% 12.86% MSCI USA High Dividend Yield Index 6.27% 12.70% 8.08% 9.18% Lipper Large Cap Value Fund Index 10.31% 18.92% 11.20% 9.38% |
| 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 | $ 18,387,580 |
| Holdings Count | Holding | 62 |
| Advisory Fees Paid, Amount | $ 19,050 |
| InvestmentCompanyPortfolioTurnover | 8% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $18,387,580 Number of Portfolio Holdings 62 Portfolio Turnover Rate 8% Management Fees $19,050 |
| Holdings [Text Block] | Industry Allocation (% of net assets) Industry Weighting . Financial Services 18.4% Computer Software and Services 11.9% Health Care 10.9% Food and Beverage 9.0% Diversified Industrial 8.0% Energy 5.6% U.S. Government Obligations 4.7% Business Services 3.8% Other Industry sectors 28.2% Other Assets and Liabilities (Net) (0.5)% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Top 10 Alphabet Inc. 4.8% Merck & Co. Inc. 4.0% American Express Co. 3.8% T-Mobile US Inc. 3.5% Mondelez International Inc. 3.2% Citigroup Inc. 3.1% JPMorgan Chase & Co. 2.8% DuPont de Nemours Inc. 2.6% Republic Services Inc. 2.5% Microsoft Corp. 2.4% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 800-GABELLI (800-422-3554) |
| Updated Prospectus Email Address | info@gabelli.com</span>" id="sjs-B132"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">info@gabelli.com</span> |
| Updated Prospectus Web Address | www.gabelli.com</span>" id="sjs-B133"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify;">www.gabelli.com</span> |
| Shareholder Report, Line Graph (Details) - USD ($) | 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 | |
| C000002889 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class AAA | ||||||||||
| C000002891 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class C | ||||||||||
| C000002887 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class I | ||||||||||
| C000002888 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - 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 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 | |
| C000002889 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class AAA | ||||
| C000002891 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class C | ||||
| Average Annual Return, Percent | 0.04% | 6.83% | 5.92% | 4.61% | |
| C000002887 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class I | ||||
| C000002888 | |||||
| Average Annual Return [Line Items] | |||||
| Line Graph and Table Measure Name | The Gabelli Dividend Growth Fund - Class A | ||||
| Average Annual Return, Percent | (0.01%) | 2.40% | 5.45% | 4.77% | |
| Without Sales Load [Member] | C000002889 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 4.92% | 8.63% | 6.71% | 5.39% | |
| Without Sales Load [Member] | C000002887 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 5.46% | 9.77% | 7.79% | 6.28% | |
| 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% | |
| MSCI USA High Dividend Yield Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.27% | 12.70% | 8.08% | 9.18% | |
| Lipper Large Cap Value Fund Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 10.31% | 18.92% | 11.20% | 9.38% | |
| MSCI USA High Dividend Yield Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.27% | 12.70% | 8.08% | 9.18% | |
| Lipper Large Cap Value Fund Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 10.31% | 18.92% | 11.20% | 9.38% | |
| MSCI USA High Dividend Yield Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.27% | 12.70% | 8.08% | 9.18% | |
| Lipper Large Cap Value Fund Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 10.31% | 18.92% | 11.20% | 9.38% | |
| MSCI USA High Dividend Yield Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 6.27% | 12.70% | 8.08% | 9.18% | |
| Lipper Large Cap Value Fund Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 10.31% | 18.92% | 11.20% | 9.38% | |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000002889 | Alphabet Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000002889 | Merck & Co. Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000002889 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002889 | T-Mobile US Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000002889 | Mondelez International Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000002889 | Citigroup Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000002889 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000002889 | DuPont de Nemours Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000002889 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000002889 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000002889 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 95.80% |
| C000002889 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002889 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002889 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000002889 | Computer Software and Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000002889 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| C000002889 | Food and Beverage | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000002889 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000002889 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000002889 | U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002889 | Business Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002889 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000002889 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002891 | Alphabet Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000002891 | Merck & Co. Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000002891 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002891 | T-Mobile US Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000002891 | Mondelez International Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000002891 | Citigroup Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000002891 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000002891 | DuPont de Nemours Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000002891 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000002891 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000002891 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 95.80% |
| C000002891 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002891 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002891 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000002891 | Computer Software and Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000002891 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| C000002891 | Food and Beverage | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000002891 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000002891 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000002891 | U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002891 | Business Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002891 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000002891 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002887 | Alphabet Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000002887 | Merck & Co. Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000002887 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002887 | T-Mobile US Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000002887 | Mondelez International Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000002887 | Citigroup Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000002887 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000002887 | DuPont de Nemours Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000002887 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000002887 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000002887 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 95.80% |
| C000002887 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002887 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002887 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000002887 | Computer Software and Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000002887 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| C000002887 | Food and Beverage | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000002887 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000002887 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000002887 | U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002887 | Business Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002887 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000002887 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002888 | Alphabet Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000002888 | Merck & Co. Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000002888 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002888 | T-Mobile US Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000002888 | Mondelez International Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000002888 | Citigroup Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000002888 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000002888 | DuPont de Nemours Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000002888 | Republic Services Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000002888 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000002888 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 95.80% |
| C000002888 | InvestmentType_U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002888 | InvestmentType_Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
| C000002888 | Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000002888 | Computer Software and Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000002888 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.90% |
| C000002888 | Food and Beverage | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000002888 | Diversified Industrial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000002888 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000002888 | U.S. Government Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000002888 | Business Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000002888 | Other Industry sectors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000002888 | Other Assets and Liabilities (Net) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.50%) |
