2.4.0.8020000 - Document - Risk/Return Summary {Unlabeled} - Dreyfus Opportunistic Small Cap Fundfalsefalsefalse1false falsefalseS000000462Memberhttp://www.sec.gov/CIK0000914775duration2013-07-09T00:00:002013-07-09T00:00:001false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00Dreyfus Opportunistic Small Cap Fundfalsefalsefalse1false truefalseS000000462Memberhttp://www.sec.gov/CIK0000914775duration2013-07-09T00:00:002013-07-09T00:00:00falsefalseDreyfus Opportunistic Small Cap Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914775_S000000462Memberdei_LegalEntityAxisexplicitMembernanafalse0Dreyfus Opportunistic Small Cap Fund2false 4rr_RiskReturnHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Dreyfus Opportunistic Small Cap Fundfalsefalsefalsexbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 false0Risk/Return [Heading]3false 4ck0000914775_SupplementTextBlockck0000914775_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 ADVANTAGE FUNDS, INC. -          Dreyfus Opportunistic Small Cap Fund Supplement to Summary and Statutory Prospectuses dated January 1, 2013 IMPORTANT NOTICE REGARDING CHANGE IN INVESTMENT POLICY falsefalsefalsenonnum:textBlockItemTypenaNo authoritative reference available.No definition available.false0Supplement [Text Block]4false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Effective on or about October 1, 2013, the following information will supersede and replace the second sentence of the first paragraph in “Principal Investment Strategy” in the summary prospectus and “Fund Summary - Principal Investment Strategy” in the prospectus and the third and fourth sentences of the first paragraph in “Fund Details - Goal and Approach” in the prospectus: The fund currently considers small cap companies to be those companies with market capitalizations that fall within the range of $50 million and $4 billion.  The fund may invest up to 20% of its net assets in securities not considered to be small cap companies. falsefalsefalsenonnum:textBlockItemTypenaPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]falseRisk/Return Summary - Dreyfus Opportunistic Small Cap Fund (Dreyfus Opportunistic Small Cap Fund)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://dreyfus.com/20130709/role/DocumentRiskReturnSummaryUnlabeledDreyfusOpportunisticSmallCapFund14