2.4.0.8020001 - Disclosure - Risk/Return Detail Data {Elements} - Dreyfus Structured Midcap Fundtruetruefalse1false falsefalseS000000499Memberhttp://www.sec.gov/CIK0000914775duration2013-07-09T00:00:002013-07-09T00:00:001false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse1false truefalseS000000499Memberhttp://www.sec.gov/CIK0000914775duration2013-07-09T00:00:002013-07-09T00:00:00falsefalseDreyfus Structured Midcap Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914775_S000000499Memberdei_LegalEntityAxisexplicitMembernanafalse0Dreyfus Structured Midcap Fund2true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:3false 4ck0000914775_SupplementTextBlockck0000914775_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 ADVANTAGE FUNDS, INC. -          Dreyfus Structured Midcap Fund Supplement to Summary and Statutory Prospectuses dated July 1, 2013 IMPORTANT NOTICE REGARDING CHANGE IN INVESTMENT POLICY falsefalsefalsenonnum:textBlockItemTypenaNo authoritative reference available.No definition available.false0Supplement [Text Block]4false 4rr_RiskReturnHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Dreyfus Structured Midcap 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]5false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 Effective on or about October 1, 2013, the following information will supersede and replace the first sentence of the first paragraph in “Principal Investment Strategy” in the summary prospectus and “Fund Summary - Principal Investment Strategy” in the prospectus and the second and third sentences of the first paragraph in “Fund Details - Goal and Approach” in the prospectus: To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in the stocks of companies with market capitalizations that fall within the range of $400 million and $29 billion (i.e., mid-cap companies).  The fund may invest up to 20% of its net assets in securities not considered to be mid-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 Detail Data - Dreyfus Structured Midcap Fund (Dreyfus Structured Midcap Fund)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://dreyfus.com/20130709/role/DisclosureRiskReturnDetailDataElementsDreyfusStructuredMidcapFund15