| Form N-CSR Cover | 6 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | AB EQUITY INCOME FUND INC |
| Entity Central Index Key | 0000910036 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 6 Months Ended |
| May 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | AB EQUITY INCOME FUND INC |
| Entity Central Index Key | 0000910036 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| C000028102 | |
| Shareholder Report [Line Items] | |
| Fund Name | AB Equity Income Fund |
| Class Name | Advisor Class |
| Trading Symbol | AUIYX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the AB Equity Income Fund (the Fund) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/AUIYX-S |
| Additional Information Phone Number | (800) 227 4618 |
| Additional Information Website | https://www.abfunds.com/link/AB/AUIYX-S</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: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">https://www.abfunds.com/link/AB/AUIYX-S</span> |
| Expenses [Text Block] | What were the Fund costs for last six months? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Advisor Class $38 0.70% |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.70% |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p>" id="sjs-B23"><p style="line-height: 15.6px; box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; margin: 0px; overflow: visible; text-align: left; height: 15.5938px; max-height: none; min-height: 0px;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p> |
| Line Graph [Table Text Block] | Advisor Class S&P 500 Index 05/14 $10,000 $10,000 11/14 $10,624 $10,858 11/15 $10,433 $11,157 11/16 $11,124 $12,056 11/17 $13,152 $14,813 11/18 $13,620 $15,743 11/19 $15,093 $18,279 11/20 $15,563 $21,470 11/21 $19,252 $27,464 11/22 $19,142 $24,935 11/23 $21,364 $28,386 05/24 $24,437 $33,028 |
| Average Annual Return [Table Text Block] | 6 Months 1 Year 5 Years 10 Years Advisor Class (without sales charge) 14.40% 25.85% 12.77% 9.39% Advisor Class (with sales charge) 14.40% 25.85% 12.77% 9.39% S&P 500 Index 16.36% 28.19% 15.80% 12.69% |
| 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. |
| AssetsNet | $ 555,423,940 |
| Holdings Count | Holding | 71 |
| Advisory Fees Paid, Amount | $ 1,464,750 |
| InvestmentCompanyPortfolioTurnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $555,423,940 # of Portfolio Holdings 71 Portfolio Turnover Rate 18% Total Advisory Fees Paid $1,464,750 |
| Holdings [Text Block] | Sector Allocation Value Value Information Technology 31.0% Financials 16.7% Health Care 13.6% Consumer Staples 6.8% Industrials 6.8% Consumer Discretionary 5.2% Energy 4.8% Communication Services 4.5% Real Estate 3.8% Utilities 3.6% Materials 2.9% Securities Lending Collateral 0.3% Others 0.2% Other assets less liabilities -0.2% |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Microsoft Corp. $49,313,708 8.9% Apple, Inc. $23,470,841 4.2% Wells Fargo & Co. $20,943,838 3.9% MetLife, Inc. $16,969,318 3.1% AbbVie, Inc. $14,993,708 2.7% American Electric Power Co., Inc. $14,847,028 2.7% Walmart, Inc. $14,619,566 2.6% Broadcom, Inc. $14,126,472 2.5% JPMorgan Chase & Co. $13,833,550 2.5% LyondellBasell Industries NV - Class A $13,538,220 2.4% Total $196,656,249 35.5% |
| Material Fund Change [Text Block] | |
| C000028099 | |
| Shareholder Report [Line Items] | |
| Fund Name | AB Equity Income Fund |
| Class Name | Class A |
| Trading Symbol | AUIAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the AB Equity Income Fund (the Fund) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/AUIAX-S |
| Additional Information Phone Number | (800) 227 4618 |
| Additional Information Website | https://www.abfunds.com/link/AB/AUIAX-S</span>" id="sjs-B44"><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: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">https://www.abfunds.com/link/AB/AUIAX-S</span> |
| Expenses [Text Block] | What were the Fund costs for last six months? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $51 0.95% |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 0.95% |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p>" id="sjs-B48"><p style="line-height: 15.6px; box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; margin: 0px; overflow: visible; text-align: left; height: 15.5938px; max-height: none; min-height: 0px;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p> |
| Line Graph [Table Text Block] | Class A S&P 500 Index 05/14 $9,574 $10,000 11/14 $10,156 $10,858 11/15 $9,945 $11,157 11/16 $10,580 $12,056 11/17 $12,476 $14,813 11/18 $12,895 $15,743 11/19 $14,258 $18,279 11/20 $14,667 $21,470 11/21 $18,105 $27,464 11/22 $17,964 $24,935 11/23 $20,023 $28,386 05/24 $22,882 $33,028 |
| Average Annual Return [Table Text Block] | 6 Months 1 Year 5 Years 10 Years Class A (without sales charge) 14.28% 25.53% 12.49% 9.10% Class A (with sales charge) 9.44% 20.19% 11.52% 8.63% S&P 500 Index 16.36% 28.19% 15.80% 12.69% |
| 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. |
| AssetsNet | $ 555,423,940 |
| Holdings Count | Holding | 71 |
| Advisory Fees Paid, Amount | $ 1,464,750 |
| InvestmentCompanyPortfolioTurnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $555,423,940 # of Portfolio Holdings 71 Portfolio Turnover Rate 18% Total Advisory Fees Paid $1,464,750 |
| Holdings [Text Block] | Sector Allocation Value Value Information Technology 31.0% Financials 16.7% Health Care 13.6% Consumer Staples 6.8% Industrials 6.8% Consumer Discretionary 5.2% Energy 4.8% Communication Services 4.5% Real Estate 3.8% Utilities 3.6% Materials 2.9% Securities Lending Collateral 0.3% Others 0.2% Other assets less liabilities -0.2% |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Microsoft Corp. $49,313,708 8.9% Apple, Inc. $23,470,841 4.2% Wells Fargo & Co. $20,943,838 3.9% MetLife, Inc. $16,969,318 3.1% AbbVie, Inc. $14,993,708 2.7% American Electric Power Co., Inc. $14,847,028 2.7% Walmart, Inc. $14,619,566 2.6% Broadcom, Inc. $14,126,472 2.5% JPMorgan Chase & Co. $13,833,550 2.5% LyondellBasell Industries NV - Class A $13,538,220 2.4% Total $196,656,249 35.5% |
| Material Fund Change [Text Block] | |
| C000028101 | |
| Shareholder Report [Line Items] | |
| Fund Name | AB Equity Income Fund |
| Class Name | Class C |
| Trading Symbol | AUICX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the AB Equity Income Fund (the Fund) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/AUICX-S |
| Additional Information Phone Number | (800) 227 4618 |
| Additional Information Website | https://www.abfunds.com/link/AB/AUICX-S</span>" id="sjs-B69"><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: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">https://www.abfunds.com/link/AB/AUICX-S</span> |
| Expenses [Text Block] | What were the Fund costs for last six months? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $91 1.71% |
| Expenses Paid, Amount | $ 91 |
| Expense Ratio, Percent | 1.71% |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p>" id="sjs-B73"><p style="line-height: 15.6px; box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; margin: 0px; overflow: visible; text-align: left; height: 15.5938px; max-height: none; min-height: 0px;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p> |
| Line Graph [Table Text Block] | Class C S&P 500 Index 05/14 $10,000 $10,000 11/14 $10,572 $10,858 11/15 $10,278 $11,157 11/16 $10,852 $12,056 11/17 $12,699 $14,813 11/18 $13,030 $15,743 11/19 $14,300 $18,279 11/20 $14,599 $21,470 11/21 $17,890 $27,464 11/22 $17,613 $24,935 11/23 $19,487 $28,386 05/24 $22,185 $33,028 |
| Average Annual Return [Table Text Block] | 6 Months 1 Year 5 Years 10 Years Class C (without sales charge) 13.84% 24.60% 11.65% 8.29% Class C (with sales charge) 12.84% 23.60% 11.65% 8.29% S&P 500 Index 16.36% 28.19% 15.80% 12.69% |
| 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. |
| AssetsNet | $ 555,423,940 |
| Holdings Count | Holding | 71 |
| Advisory Fees Paid, Amount | $ 1,464,750 |
| InvestmentCompanyPortfolioTurnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $555,423,940 # of Portfolio Holdings 71 Portfolio Turnover Rate 18% Total Advisory Fees Paid $1,464,750 |
| Holdings [Text Block] | Sector Allocation Value Value Information Technology 31.0% Financials 16.7% Health Care 13.6% Consumer Staples 6.8% Industrials 6.8% Consumer Discretionary 5.2% Energy 4.8% Communication Services 4.5% Real Estate 3.8% Utilities 3.6% Materials 2.9% Securities Lending Collateral 0.3% Others 0.2% Other assets less liabilities -0.2% |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Microsoft Corp. $49,313,708 8.9% Apple, Inc. $23,470,841 4.2% Wells Fargo & Co. $20,943,838 3.9% MetLife, Inc. $16,969,318 3.1% AbbVie, Inc. $14,993,708 2.7% American Electric Power Co., Inc. $14,847,028 2.7% Walmart, Inc. $14,619,566 2.6% Broadcom, Inc. $14,126,472 2.5% JPMorgan Chase & Co. $13,833,550 2.5% LyondellBasell Industries NV - Class A $13,538,220 2.4% Total $196,656,249 35.5% |
| Material Fund Change [Text Block] | |
| C000028105 | |
| Shareholder Report [Line Items] | |
| Fund Name | AB Equity Income Fund |
| Class Name | Class I |
| Trading Symbol | AUIIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the AB Equity Income Fund (the Fund) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/AUIIX-S |
| Additional Information Phone Number | (800) 227 4618 |
| Additional Information Website | https://www.abfunds.com/link/AB/AUIIX-S</span>" id="sjs-B94"><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: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">https://www.abfunds.com/link/AB/AUIIX-S</span> |
| Expenses [Text Block] | What were the Fund costs for last six months? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $41 0.76% |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.76% |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p>" id="sjs-B98"><p style="line-height: 15.6px; box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; margin: 0px; overflow: visible; text-align: left; height: 15.5938px; max-height: none; min-height: 0px;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p> |
| Line Graph [Table Text Block] | Class I S&P 500 Index 05/14 $10,000 $10,000 11/14 $10,624 $10,858 11/15 $10,433 $11,157 11/16 $11,124 $12,056 11/17 $13,152 $14,813 11/18 $13,620 $15,743 11/19 $15,093 $18,279 11/20 $15,563 $21,470 11/21 $19,252 $27,464 11/22 $19,142 $24,935 11/23 $21,364 $28,386 05/24 $24,437 $33,028 |
| Average Annual Return [Table Text Block] | 6 Months 1 Year 5 Years 10 Years Class I (without sales charge) 14.38% 25.72% 12.70% 9.35% Class I (with sales charge) 14.38% 25.72% 12.70% 9.35% S&P 500 Index 16.36% 28.19% 15.80% 12.69% |
| 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. |
| AssetsNet | $ 555,423,940 |
| Holdings Count | Holding | 71 |
| Advisory Fees Paid, Amount | $ 1,464,750 |
| InvestmentCompanyPortfolioTurnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $555,423,940 # of Portfolio Holdings 71 Portfolio Turnover Rate 18% Total Advisory Fees Paid $1,464,750 |
| Holdings [Text Block] | Sector Allocation Value Value Information Technology 31.0% Financials 16.7% Health Care 13.6% Consumer Staples 6.8% Industrials 6.8% Consumer Discretionary 5.2% Energy 4.8% Communication Services 4.5% Real Estate 3.8% Utilities 3.6% Materials 2.9% Securities Lending Collateral 0.3% Others 0.2% Other assets less liabilities -0.2% |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Microsoft Corp. $49,313,708 8.9% Apple, Inc. $23,470,841 4.2% Wells Fargo & Co. $20,943,838 3.9% MetLife, Inc. $16,969,318 3.1% AbbVie, Inc. $14,993,708 2.7% American Electric Power Co., Inc. $14,847,028 2.7% Walmart, Inc. $14,619,566 2.6% Broadcom, Inc. $14,126,472 2.5% JPMorgan Chase & Co. $13,833,550 2.5% LyondellBasell Industries NV - Class A $13,538,220 2.4% Total $196,656,249 35.5% |
| Material Fund Change [Text Block] | |
| C000135457 | |
| Shareholder Report [Line Items] | |
| Fund Name | AB Equity Income Fund |
| Class Name | Class Z |
| Trading Symbol | AUIZX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the AB Equity Income Fund (the Fund) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/AUIZX-S |
| Additional Information Phone Number | (800) 227 4618 |
| Additional Information Website | https://www.abfunds.com/link/AB/AUIZX-S</span>" id="sjs-B119"><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: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">https://www.abfunds.com/link/AB/AUIZX-S</span> |
| Expenses [Text Block] | What were the Fund costs for last six months? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $35 0.66% |
| Expenses Paid, Amount | $ 35 |
| Expense Ratio, Percent | 0.66% |
| Performance Past Does Not Indicate Future [Text] | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p>" id="sjs-B123"><p style="line-height: 15.6px; box-sizing: border-box; color: rgb(0, 0, 0); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; margin: 0px; overflow: visible; text-align: left; height: 15.5938px; max-height: none; min-height: 0px;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 15.6px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">The Funds past performance is not a good predictor of the Funds future performance.</span></p> |
| Line Graph [Table Text Block] | Class Z S&P 500 Index 05/14 $10,000 $10,000 11/14 $10,630 $10,858 11/15 $10,446 $11,157 11/16 $11,153 $12,056 11/17 $13,196 $14,813 11/18 $13,684 $15,743 11/19 $15,175 $18,279 11/20 $15,663 $21,470 11/21 $19,390 $27,464 11/22 $19,298 $24,935 11/23 $21,576 $28,386 05/24 $24,689 $33,028 |
| Average Annual Return [Table Text Block] | 6 Months 1 Year 5 Years 10 Years Class Z (without sales charge) 14.43% 25.88% 12.82% 9.46% Class Z (with sales charge) 14.43% 25.88% 12.82% 9.46% S&P 500 Index 16.36% 28.19% 15.80% 12.69% |
| 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. |
| AssetsNet | $ 555,423,940 |
| Holdings Count | Holding | 71 |
| Advisory Fees Paid, Amount | $ 1,464,750 |
| InvestmentCompanyPortfolioTurnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $555,423,940 # of Portfolio Holdings 71 Portfolio Turnover Rate 18% Total Advisory Fees Paid $1,464,750 |
| Holdings [Text Block] | Sector Allocation Value Value Information Technology 31.0% Financials 16.7% Health Care 13.6% Consumer Staples 6.8% Industrials 6.8% Consumer Discretionary 5.2% Energy 4.8% Communication Services 4.5% Real Estate 3.8% Utilities 3.6% Materials 2.9% Securities Lending Collateral 0.3% Others 0.2% Other assets less liabilities -0.2% |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Microsoft Corp. $49,313,708 8.9% Apple, Inc. $23,470,841 4.2% Wells Fargo & Co. $20,943,838 3.9% MetLife, Inc. $16,969,318 3.1% AbbVie, Inc. $14,993,708 2.7% American Electric Power Co., Inc. $14,847,028 2.7% Walmart, Inc. $14,619,566 2.6% Broadcom, Inc. $14,126,472 2.5% JPMorgan Chase & Co. $13,833,550 2.5% LyondellBasell Industries NV - Class A $13,538,220 2.4% Total $196,656,249 35.5% |
| Material Fund Change [Text Block] |
| Shareholder Report, Line Graph (Details) - USD ($) | 6 Months Ended | |||||||||||
| May 31, 2024 | Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2016 | Nov. 30, 2015 | Nov. 30, 2014 | May 31, 2014 | |
| C000028102 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Advisor Class | |||||||||||
| Account Value | $ 24,437 | $ 21,364 | $ 19,142 | $ 19,252 | $ 15,563 | $ 15,093 | $ 13,620 | $ 13,152 | $ 11,124 | $ 10,433 | $ 10,624 | $ 10,000 |
| C000028099 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class A | |||||||||||
| Account Value | $ 22,882 | 20,023 | 17,964 | 18,105 | 14,667 | 14,258 | 12,895 | 12,476 | 10,580 | 9,945 | 10,156 | 9,574 |
| C000028101 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class C | |||||||||||
| Account Value | $ 22,185 | 19,487 | 17,613 | 17,890 | 14,599 | 14,300 | 13,030 | 12,699 | 10,852 | 10,278 | 10,572 | 10,000 |
| C000028105 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||||
| Account Value | $ 24,437 | 21,364 | 19,142 | 19,252 | 15,563 | 15,093 | 13,620 | 13,152 | 11,124 | 10,433 | 10,624 | 10,000 |
| C000135457 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class Z | |||||||||||
| Account Value | $ 24,689 | 21,576 | 19,298 | 19,390 | 15,663 | 15,175 | 13,684 | 13,196 | 11,153 | 10,446 | 10,630 | 10,000 |
| AllianceBernstein Index: S&P 500 Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | |||||||||||
| Account Value | $ 33,028 | 28,386 | 24,935 | 27,464 | 21,470 | 18,279 | 15,743 | 14,813 | 12,056 | 11,157 | 10,858 | 10,000 |
| AllianceBernstein Index: S&P 500 Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | |||||||||||
| Account Value | $ 33,028 | 28,386 | 24,935 | 27,464 | 21,470 | 18,279 | 15,743 | 14,813 | 12,056 | 11,157 | 10,858 | 10,000 |
| AllianceBernstein Index: S&P 500 Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | |||||||||||
| Account Value | $ 33,028 | 28,386 | 24,935 | 27,464 | 21,470 | 18,279 | 15,743 | 14,813 | 12,056 | 11,157 | 10,858 | 10,000 |
| AllianceBernstein Index: S&P 500 Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | |||||||||||
| Account Value | $ 33,028 | 28,386 | 24,935 | 27,464 | 21,470 | 18,279 | 15,743 | 14,813 | 12,056 | 11,157 | 10,858 | 10,000 |
| AllianceBernstein Index: S&P 500 Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | |||||||||||
| Account Value | $ 33,028 | $ 28,386 | $ 24,935 | $ 27,464 | $ 21,470 | $ 18,279 | $ 15,743 | $ 14,813 | $ 12,056 | $ 11,157 | $ 10,858 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| May 31, 2024 | May 31, 2024 | May 31, 2024 | May 31, 2024 | |
| C000028102 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Advisor Class | |||
| C000028099 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A | |||
| C000028101 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C | |||
| C000028105 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class I | |||
| C000135457 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class Z | |||
| Without Sales Load [Member] | C000028102 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 14.40% | 25.85% | 12.77% | 9.39% |
| Without Sales Load [Member] | C000028099 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 14.28% | 25.53% | 12.49% | 9.10% |
| Without Sales Load [Member] | C000028101 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.84% | 24.60% | 11.65% | 8.29% |
| Without Sales Load [Member] | C000028105 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 14.38% | 25.72% | 12.70% | 9.35% |
| Without Sales Load [Member] | C000135457 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 14.43% | 25.88% | 12.82% | 9.46% |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 16.36% | 28.19% | 15.80% | 12.69% |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 16.36% | 28.19% | 15.80% | 12.69% |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 16.36% | 28.19% | 15.80% | 12.69% |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 16.36% | 28.19% | 15.80% | 12.69% |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 16.36% | 28.19% | 15.80% | 12.69% |
| Shareholder Report, Holdings (Details) | May 31, 2024 |
| C000028102 | Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000028102 | Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028102 | Wells Fargo & Co.FR_949746101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000028102 | MetLife, Inc.FR_59156R108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000028102 | AbbVie, Inc.FR_00287Y109 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028102 | American Electric Power Co., Inc.FR_025537101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028102 | Walmart, Inc.FR_931142103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028102 | Broadcom, Inc.FR_11135F101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028102 | JPMorgan Chase & Co.FR_46625H100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028102 | LyondellBasell Industries NVFR_N53745100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028102 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31% |
| C000028102 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| C000028102 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000028102 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028102 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028102 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000028102 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000028102 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000028102 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000028102 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028102 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000028102 | Securities Lending Collateral | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000028102 | Others | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000028099 | Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000028099 | Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028099 | Wells Fargo & Co.FR_949746101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000028099 | MetLife, Inc.FR_59156R108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000028099 | AbbVie, Inc.FR_00287Y109 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028099 | American Electric Power Co., Inc.FR_025537101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028099 | Walmart, Inc.FR_931142103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028099 | Broadcom, Inc.FR_11135F101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028099 | JPMorgan Chase & Co.FR_46625H100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028099 | LyondellBasell Industries NVFR_N53745100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028099 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31% |
| C000028099 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| C000028099 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000028099 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028099 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028099 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000028099 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000028099 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000028099 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000028099 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028099 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000028099 | Securities Lending Collateral | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000028099 | Others | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000028101 | Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000028101 | Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028101 | Wells Fargo & Co.FR_949746101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000028101 | MetLife, Inc.FR_59156R108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000028101 | AbbVie, Inc.FR_00287Y109 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028101 | American Electric Power Co., Inc.FR_025537101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028101 | Walmart, Inc.FR_931142103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028101 | Broadcom, Inc.FR_11135F101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028101 | JPMorgan Chase & Co.FR_46625H100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028101 | LyondellBasell Industries NVFR_N53745100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028101 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31% |
| C000028101 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| C000028101 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000028101 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028101 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028101 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000028101 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000028101 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000028101 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000028101 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028101 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000028101 | Securities Lending Collateral | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000028101 | Others | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000028105 | Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000028105 | Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028105 | Wells Fargo & Co.FR_949746101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000028105 | MetLife, Inc.FR_59156R108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000028105 | AbbVie, Inc.FR_00287Y109 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028105 | American Electric Power Co., Inc.FR_025537101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000028105 | Walmart, Inc.FR_931142103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028105 | Broadcom, Inc.FR_11135F101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028105 | JPMorgan Chase & Co.FR_46625H100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028105 | LyondellBasell Industries NVFR_N53745100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028105 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31% |
| C000028105 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| C000028105 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000028105 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028105 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000028105 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000028105 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000028105 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000028105 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000028105 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028105 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000028105 | Securities Lending Collateral | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000028105 | Others | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000135457 | Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000135457 | Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000135457 | Wells Fargo & Co.FR_949746101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000135457 | MetLife, Inc.FR_59156R108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| C000135457 | AbbVie, Inc.FR_00287Y109 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000135457 | American Electric Power Co., Inc.FR_025537101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000135457 | Walmart, Inc.FR_931142103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000135457 | Broadcom, Inc.FR_11135F101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000135457 | JPMorgan Chase & Co.FR_46625H100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000135457 | LyondellBasell Industries NVFR_N53745100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000135457 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31% |
| C000135457 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| C000135457 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| C000135457 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000135457 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000135457 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000135457 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000135457 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000135457 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000135457 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000135457 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000135457 | Securities Lending Collateral | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000135457 | Others | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
