| Label |
Element |
Value |
| DREYFUS THIRD CENTURY FUND INC |
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| Risk/Return: |
rr_RiskReturnAbstract |
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| Risk/Return [Heading] |
rr_RiskReturnHeading |
Fund Summary
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| Objective [Heading] |
rr_ObjectiveHeading |
Investment Objective
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| Objective, Primary [Text Block] |
rr_ObjectivePrimaryTextBlock |
The fund seeks to provide capital growth,
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| Objective, Secondary [Text Block] |
rr_ObjectiveSecondaryTextBlock |
with current income as a secondary goal.
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| Expense [Heading] |
rr_ExpenseHeading |
Fees and Expenses
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| Expense Narrative [Text Block] |
rr_ExpenseNarrativeTextBlock |
This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds. More information about these and other discounts is available from your financial professional and in the Shareholder Guide section beginning on page 8 of the prospectus and in the How to Buy Shares section and the Additional Information About How to Buy Shares section beginning on page II-1 and page III-1, respectively, of the fund's Statement of Additional Information.
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| Shareholder Fees Caption [Text] |
rr_ShareholderFeesCaption |
Shareholder Fees (fees paid directly from your investment)
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| Operating Expenses Caption [Text] |
rr_OperatingExpensesCaption |
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
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| Portfolio Turnover [Heading] |
rr_PortfolioTurnoverHeading |
Portfolio Turnover
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| Portfolio Turnover [Text Block] |
rr_PortfolioTurnoverTextBlock |
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 57.09% of the average value of its portfolio.
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| Portfolio Turnover, Rate |
rr_PortfolioTurnoverRate |
57.09%
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| Expense Breakpoint Discounts [Text] |
rr_ExpenseBreakpointDiscounts |
You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds.
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| Expense Breakpoint, Minimum Investment Required [Amount] |
rr_ExpenseBreakpointMinimumInvestmentRequiredAmount |
$ 50,000
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| Expense Example [Heading] |
rr_ExpenseExampleHeading |
Example
|
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| Expense Example Narrative [Text Block] |
rr_ExpenseExampleNarrativeTextBlock |
The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, No Redemption, By Year, Caption [Text] |
rr_ExpenseExampleNoRedemptionByYearCaption |
You would pay the following expenses if you did not redeem your shares:
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| Strategy [Heading] |
rr_StrategyHeading |
Principal Investment Strategy
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| Strategy Narrative [Text Block] |
rr_StrategyNarrativeTextBlock |
To pursue its goals, the fund, under normal circumstances, invests at least 80% of its net assets in the common stocks of companies that, in the opinion of the fund's management, meet traditional investment standards and conduct their business in a manner that contributes to the enhancement of the quality of life in America.
The fund's investment strategy combines a disciplined investment process that consists of computer modeling techniques, fundamental analysis and risk management with a social investment process. In selecting stocks, the portfolio managers begin by using computer models to identify and rank stocks within an industry or sector, based on several characteristics, including value, growth and financial profile.
Next, based on fundamental analysis, the portfolio managers designate the most attractive of the higher ranked securities as potential purchase candidates, drawing on a variety of sources, including company management and internal as well as Wall Street research.
The portfolio managers then evaluate each stock considered to be a potential purchase candidate, by industry or sector, to determine whether the company enhances the quality of life in America by considering its record in the areas of protection and improvement of the environment and the proper use of our natural resources, occupational health and safety, consumer protection and product purity and equal employment opportunity.
The portfolio managers then further examine the companies determined to be eligible for purchase, by industry or sector, and select investments from those companies the portfolio managers consider to be the most attractive based on financial considerations.
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| Risk [Heading] |
rr_RiskHeading |
Principal Risks
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| Risk Narrative [Text Block] |
rr_RiskNarrativeTextBlock |
An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.
· Risks of stock investing. Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general market conditions or because of factors that affect the particular company or the company's industry.
· Social investment risk. Socially responsible investment criteria may limit the number of investment opportunities available to the fund, and as a result, at times the fund's returns may be lower than those funds that are not subject to such special investment considerations.
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| Risk Lose Money [Text] |
rr_RiskLoseMoney |
The fund's share price fluctuates, sometimes dramatically, which means you could lose money.
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| Risk Not Insured Depository Institution [Text] |
rr_RiskNotInsuredDepositoryInstitution |
An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
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| Bar Chart and Performance Table [Heading] |
rr_BarChartAndPerformanceTableHeading |
Performance
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| Performance Narrative [Text Block] |
rr_PerformanceNarrativeTextBlock |
The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class Z shares from year to year. The table compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance information may be available at www.dreyfus.com.
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| Performance Information Illustrates Variability of Returns [Text] |
rr_PerformanceInformationIllustratesVariabilityOfReturns |
The following bar chart and table provide some indication of the risks of investing in the fund.
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| Performance Availability Website Address [Text] |
rr_PerformanceAvailabilityWebSiteAddress |
www.dreyfus.com
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| Performance Past Does Not Indicate Future [Text] |
rr_PerformancePastDoesNotIndicateFuture |
The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
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| Bar Chart [Heading] |
rr_BarChartHeading |
Year-by-Year Total Returns as of 12/31 each year (%) Class Z
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| Bar Chart Does Not Reflect Sales Loads [Text] |
rr_BarChartDoesNotReflectSalesLoads |
Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown.
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| Bar Chart Closing [Text Block] |
rr_BarChartClosingTextBlock |
| | | | | | Best Quarter
Q2, 2009: 17.10% Worst Quarter
Q4, 2008: -21.30% |
The year-to-date total return of the fund's Class Z shares as of June 30, 2015 was 0.00%.
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|
| Year to Date Return, Label |
rr_YearToDateReturnLabel |
The year-to-date total return
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| Bar Chart, Year to Date Return, Date |
rr_BarChartYearToDateReturnDate |
Jun. 30, 2015
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| Bar Chart, Year to Date Return |
rr_BarChartYearToDateReturn |
none
|
|
| Highest Quarterly Return, Label |
rr_HighestQuarterlyReturnLabel |
Best Quarter
|
|
| Highest Quarterly Return, Date |
rr_BarChartHighestQuarterlyReturnDate |
Jun. 30, 2009
|
|
| Highest Quarterly Return |
rr_BarChartHighestQuarterlyReturn |
17.10%
|
|
| Lowest Quarterly Return, Label |
rr_LowestQuarterlyReturnLabel |
Worst Quarter
|
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| Lowest Quarterly Return, Date |
rr_BarChartLowestQuarterlyReturnDate |
Dec. 31, 2008
|
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| Lowest Quarterly Return |
rr_BarChartLowestQuarterlyReturn |
(21.30%)
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| Index No Deduction for Fees, Expenses, Taxes [Text] |
rr_IndexNoDeductionForFeesExpensesTaxes |
reflects no deduction for fees, expenses or taxes
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| Performance Table Uses Highest Federal Rate |
rr_PerformanceTableUsesHighestFederalRate |
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.
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| Performance Table Not Relevant to Tax Deferred |
rr_PerformanceTableNotRelevantToTaxDeferred |
Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
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|
| Performance Table One Class of after Tax Shown [Text] |
rr_PerformanceTableOneClassOfAfterTaxShown |
After-tax performance is shown only for Class Z shares. After tax performance of the fund's other share classes will vary.
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|
| Performance Table Narrative |
rr_PerformanceTableNarrativeTextBlock |
After-tax performance is shown only for Class Z shares. After tax performance of the fund's other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
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| Caption |
rr_AverageAnnualReturnCaption |
Average Annual Total Returns (as of 12/31/14)
|
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| DREYFUS THIRD CENTURY FUND INC | S&P 500 Comp Stock Price Index reflects no deduction for fees, expenses or taxes |
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| Risk/Return: |
rr_RiskReturnAbstract |
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| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
13.66%
|
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| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
15.44%
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| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
7.67%
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| DREYFUS THIRD CENTURY FUND INC | Class A |
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|
|
| Risk/Return: |
rr_RiskReturnAbstract |
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| Maximum sales charge (load) imposed on purchases (as a percentage of offering price) |
rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice |
5.75%
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| Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) |
rr_MaximumDeferredSalesChargeOverOther |
none
|
[1] |
| Management fees |
rr_ManagementFeesOverAssets |
0.75%
|
|
| Distribution (12b-1) fees |
rr_DistributionAndService12b1FeesOverAssets |
none
|
|
| Other expenses (including shareholder services fees) |
rr_OtherExpensesOverAssets |
0.45%
|
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| Total annual fund operating expenses |
rr_ExpensesOverAssets |
1.20%
|
|
| Expenses Deferred Charges [Text Block] |
rr_ExpensesDeferredChargesTextBlock |
Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year.
|
|
| Expense Example, with Redemption, 1 Year |
rr_ExpenseExampleYear01 |
$ 690
|
|
| Expense Example, with Redemption, 3 Years |
rr_ExpenseExampleYear03 |
934
|
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| Expense Example, with Redemption, 5 Years |
rr_ExpenseExampleYear05 |
1,197
|
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| Expense Example, with Redemption, 10 Years |
rr_ExpenseExampleYear10 |
1,946
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| Expense Example, No Redemption, 1 Year |
rr_ExpenseExampleNoRedemptionYear01 |
690
|
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| Expense Example, No Redemption, 3 Years |
rr_ExpenseExampleNoRedemptionYear03 |
934
|
|
| Expense Example, No Redemption, 5 Years |
rr_ExpenseExampleNoRedemptionYear05 |
1,197
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| Expense Example, No Redemption, 10 Years |
rr_ExpenseExampleNoRedemptionYear10 |
$ 1,946
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| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
6.41%
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| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
12.69%
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| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
6.66%
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| DREYFUS THIRD CENTURY FUND INC | Class C |
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| Risk/Return: |
rr_RiskReturnAbstract |
|
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| Maximum sales charge (load) imposed on purchases (as a percentage of offering price) |
rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice |
none
|
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| Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) |
rr_MaximumDeferredSalesChargeOverOther |
1.00%
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|
| Management fees |
rr_ManagementFeesOverAssets |
0.75%
|
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| Distribution (12b-1) fees |
rr_DistributionAndService12b1FeesOverAssets |
0.75%
|
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| Other expenses (including shareholder services fees) |
rr_OtherExpensesOverAssets |
0.46%
|
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| Total annual fund operating expenses |
rr_ExpensesOverAssets |
1.96%
|
|
| Expense Example, with Redemption, 1 Year |
rr_ExpenseExampleYear01 |
$ 299
|
|
| Expense Example, with Redemption, 3 Years |
rr_ExpenseExampleYear03 |
615
|
|
| Expense Example, with Redemption, 5 Years |
rr_ExpenseExampleYear05 |
1,057
|
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| Expense Example, with Redemption, 10 Years |
rr_ExpenseExampleYear10 |
2,285
|
|
| Expense Example, No Redemption, 1 Year |
rr_ExpenseExampleNoRedemptionYear01 |
199
|
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| Expense Example, No Redemption, 3 Years |
rr_ExpenseExampleNoRedemptionYear03 |
615
|
|
| Expense Example, No Redemption, 5 Years |
rr_ExpenseExampleNoRedemptionYear05 |
1,057
|
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| Expense Example, No Redemption, 10 Years |
rr_ExpenseExampleNoRedemptionYear10 |
$ 2,285
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|
| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
11.12%
|
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| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
13.21%
|
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| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
6.51%
|
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| DREYFUS THIRD CENTURY FUND INC | Class I |
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|
|
| Risk/Return: |
rr_RiskReturnAbstract |
|
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| Maximum sales charge (load) imposed on purchases (as a percentage of offering price) |
rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice |
none
|
|
| Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) |
rr_MaximumDeferredSalesChargeOverOther |
none
|
|
| Management fees |
rr_ManagementFeesOverAssets |
0.75%
|
|
| Distribution (12b-1) fees |
rr_DistributionAndService12b1FeesOverAssets |
none
|
|
| Other expenses (including shareholder services fees) |
rr_OtherExpensesOverAssets |
0.15%
|
|
| Total annual fund operating expenses |
rr_ExpensesOverAssets |
0.90%
|
|
| Expense Example, with Redemption, 1 Year |
rr_ExpenseExampleYear01 |
$ 92
|
|
| Expense Example, with Redemption, 3 Years |
rr_ExpenseExampleYear03 |
287
|
|
| Expense Example, with Redemption, 5 Years |
rr_ExpenseExampleYear05 |
498
|
|
| Expense Example, with Redemption, 10 Years |
rr_ExpenseExampleYear10 |
1,108
|
|
| Expense Example, No Redemption, 1 Year |
rr_ExpenseExampleNoRedemptionYear01 |
92
|
|
| Expense Example, No Redemption, 3 Years |
rr_ExpenseExampleNoRedemptionYear03 |
287
|
|
| Expense Example, No Redemption, 5 Years |
rr_ExpenseExampleNoRedemptionYear05 |
498
|
|
| Expense Example, No Redemption, 10 Years |
rr_ExpenseExampleNoRedemptionYear10 |
$ 1,108
|
|
| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
13.27%
|
|
| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
14.47%
|
|
| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
7.64%
|
|
| DREYFUS THIRD CENTURY FUND INC | Class Z |
|
|
|
| Risk/Return: |
rr_RiskReturnAbstract |
|
|
| Maximum sales charge (load) imposed on purchases (as a percentage of offering price) |
rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice |
none
|
|
| Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) |
rr_MaximumDeferredSalesChargeOverOther |
none
|
|
| Management fees |
rr_ManagementFeesOverAssets |
0.75%
|
|
| Distribution (12b-1) fees |
rr_DistributionAndService12b1FeesOverAssets |
none
|
|
| Other expenses (including shareholder services fees) |
rr_OtherExpensesOverAssets |
0.23%
|
|
| Total annual fund operating expenses |
rr_ExpensesOverAssets |
0.98%
|
|
| Expense Example, with Redemption, 1 Year |
rr_ExpenseExampleYear01 |
$ 100
|
|
| Expense Example, with Redemption, 3 Years |
rr_ExpenseExampleYear03 |
312
|
|
| Expense Example, with Redemption, 5 Years |
rr_ExpenseExampleYear05 |
542
|
|
| Expense Example, with Redemption, 10 Years |
rr_ExpenseExampleYear10 |
1,201
|
|
| Expense Example, No Redemption, 1 Year |
rr_ExpenseExampleNoRedemptionYear01 |
100
|
|
| Expense Example, No Redemption, 3 Years |
rr_ExpenseExampleNoRedemptionYear03 |
312
|
|
| Expense Example, No Redemption, 5 Years |
rr_ExpenseExampleNoRedemptionYear05 |
542
|
|
| Expense Example, No Redemption, 10 Years |
rr_ExpenseExampleNoRedemptionYear10 |
$ 1,201
|
|
| Annual Return 2005 |
rr_AnnualReturn2005 |
3.47%
|
|
| Annual Return 2006 |
rr_AnnualReturn2006 |
9.01%
|
|
| Annual Return 2007 |
rr_AnnualReturn2007 |
7.56%
|
|
| Annual Return 2008 |
rr_AnnualReturn2008 |
(34.30%)
|
|
| Annual Return 2009 |
rr_AnnualReturn2009 |
33.30%
|
|
| Annual Return 2010 |
rr_AnnualReturn2010 |
14.49%
|
|
| Annual Return 2011 |
rr_AnnualReturn2011 |
0.69%
|
|
| Annual Return 2012 |
rr_AnnualReturn2012 |
11.66%
|
|
| Annual Return 2013 |
rr_AnnualReturn2013 |
34.09%
|
|
| Annual Return 2014 |
rr_AnnualReturn2014 |
13.15%
|
|
| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
13.15%
|
|
| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
14.33%
|
|
| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
7.57%
|
|
| DREYFUS THIRD CENTURY FUND INC | Class Z | After Taxes on Distributions |
|
|
|
| Risk/Return: |
rr_RiskReturnAbstract |
|
|
| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
10.02%
|
|
| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
13.40%
|
|
| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
7.10%
|
|
| DREYFUS THIRD CENTURY FUND INC | Class Z | After Taxes on Distributions and Sale of Fund Shares |
|
|
|
| Risk/Return: |
rr_RiskReturnAbstract |
|
|
| Average Annual Returns, 1 Year |
rr_AverageAnnualReturnYear01 |
10.07%
|
|
| Average Annual Returns, 5 Years |
rr_AverageAnnualReturnYear05 |
12.22%
|
|
| Average Annual Returns, 10 Years |
rr_AverageAnnualReturnYear10 |
6.51%
|
|
|
|
