2.2.0.25truefalse010000 - Document - Risk/Return Summary {Unlabeled}falsefalsetrue1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : AAAA Member {dei_LegalEntityAxis} : S000008467 Member 3/30/2011 - 3/30/2011 USD ($) $c_S000008467_AAAAhttp://www.sec.gov/CIK0000045147duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseoppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseoppenheimer_S000008467Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170RatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://xbrl.sec.gov/rr/role/riskreturn1falsefalsefalse00Equity Fund Inc | Oppenheimer Equity Fund IncEquity Fund Inc | Oppenheimer Equity Fund Incfalsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : AAAA Member {dei_LegalEntityAxis} : S000008467 Member 3/30/2011 - 3/30/2011 USD ($) $c_S000008467_AAAAhttp://www.sec.gov/CIK0000045147duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseoppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseoppenheimer_S000008467Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170RatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEquity Fund Inc | Oppenheimer Equity Fund Inc3false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Investment Objective. </b>The Fund seeks high total return.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective, Primary [Text Block]4false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Fees and Expenses of the Fund.</b> This table describes the fees and expenses that you may pay if you buy and hold or redeem shares of the Fund. You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $25,000 in certain funds in the Oppenheimer family of funds. More information about these and other discounts is available from your financial professional and in the section "About Your Account" beginning on page 11 of the prospectus and in the sections "How to Buy Shares" beginning on page 51 and "Appendix A" in the Fund's Statement of Additional Information.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared 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 $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalseExpense Narrative [Text Block]5false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <b>Shareholder Fees</b> (fees paid directly from your investment) falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalseShareholder Fees Caption [Text]6false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~http://oppenheimer/role/ShareholderFeesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsefalse<div style="display:none">~http://oppenheimer/role/ShareholderFeesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsehttp://oppenheimer/role/ShareholderFeesDataAAAAfalsefalse020012 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass AEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023202Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023203Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Nrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023204Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass NEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023205Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue00falsefalsefalsetruefalse3truetruetrue00falsefalsefalsetruefalse4truetruetrue00falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalseMaximum Sales Charge (Load) imposed on purchases (as % of offering price)falsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue00falsefalsefalsetruefalse3truetruetrue00falsefalsefalsetruefalse4truetruetrue00falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseMaximum Sales Charge (Load) imposed on purchases (as % of offering price)2falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00falsefalsefalsetruefalse2truetruetrue0.050.05falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue0.010.01falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalseMaximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)falsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00falsefalsefalsetruefalse2truetruetrue0.050.05falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue0.010.01falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseMaximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)52Shareholder Fees Equity Fund Inc Oppenheimer Equity Fund IncUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467MemberfalsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalseShareholder Fees [Table]7false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Annual Fund Operating Expenses</b> (expenses that you pay each year as a percentage of the value of your investment)</p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalseOperating Expenses Caption [Text]8false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/OperatingExpensesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/OperatingExpensesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsehttp://oppenheimer/role/OperatingExpensesDataAAAAfalsefalse020022 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass AEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023202Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023203Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Nrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023204Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass NEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023205Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00550.0055falsefalsefalsetruefalse2truetruetrue0.00550.0055falsefalsefalsetruefalse3truetruetrue0.00550.0055falsefalsefalsetruefalse4truetruetrue0.00550.0055falsefalsefalsetruefalse5truetruetrue0.00550.0055falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalseManagement FeesfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00550.0055falsefalsefalsetruefalse2truetruetrue0.00550.0055falsefalsefalsetruefalse3truetruetrue0.00550.0055falsefalsefalsetruefalse4truetruetrue0.00550.0055falsefalsefalsetruefalse5truetruetrue0.00550.0055falsefalsefalsetruefalseOthernanafalsefalseManagement Fees2falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00220.0022falsefalsefalsetruefalse2truetruetrue0.010.01falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue0.0050.005falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalseDistribution and/or Service (12b-1) FeesfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00220.0022falsefalsefalsetruefalse2truetruetrue0.010.01falsefalsefalsetruefalse3truetruetrue0.010.01falsefalsefalsetruefalse4truetruetrue0.0050.005falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseDistribution and/or Service (12b-1) Fees3falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member5false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00220.0022falsefalsefalsetruefalse2truetruetrue0.00620.0062falsefalsefalsetruefalse3truetruetrue0.00390.0039falsefalsefalsetruefalse4truetruetrue0.00430.0043falsefalsefalsetruefalse5truetruetrue0.00280.0028falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions truefalseOther ExpensesfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00220.0022falsefalsefalsetruefalse2truetruetrue0.00620.0062falsefalsefalsetruefalse3truetruetrue0.00390.0039falsefalsefalsetruefalse4truetruetrue0.00430.0043falsefalsefalsetruefalse5truetruetrue0.00280.0028falsefalsefalsetruefalseOthernanafalsefalseOther Expenses4falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member6false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00990.0099falsefalsefalsetruefalse2truetruetrue0.02170.0217falsefalsefalsetruefalse3truetruetrue0.01940.0194falsefalsefalsetruefalse4truetruetrue0.01480.0148falsefalsefalsetruefalse5truetruetrue0.00830.0083falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions truefalseTotal Annual Fund Operating ExpensesfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00990.0099falsefalsefalsetruefalse2truetruetrue0.02170.0217falsefalsefalsetruefalse3truetruetrue0.01940.0194falsefalsefalsetruefalse4truetruetrue0.01480.0148falsefalsefalsetruefalse5truetruetrue0.00830.0083falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses5falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member7false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00[1]falsefalsefalsetruefalse2truetruetrue-0.0021-0.0021[1]falsefalsefalsetruefalse3truetruetrue-0.0001-0.0001[1]falsefalsefalsetruefalse4truetruetrue-0.0005-0.0005[1]falsefalsefalsetruefalse5truetruetrue00[1]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalseFee Waiver and Expense ReimbursementfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue00falsefalsefalsetruefalse2truetruetrue-0.0021-0.0021falsefalsefalsetruefalse3truetruetrue-0.0001-0.0001falsefalsefalsetruefalse4truetruetrue-0.0005-0.0005falsefalsefalsetruefalse5truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseFee Waiver and Expense Reimbursement6falseRowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467Member8false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00990.0099falsefalsefalsetruefalse2truetruetrue0.01960.0196falsefalsefalsetruefalse3truetruetrue0.01930.0193falsefalsefalsetruefalse4truetruetrue0.01430.0143falsefalsefalsetruefalse5truetruetrue0.00830.0083falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table truefalseTotal Annual Fund Operating Expenses After Fee Waiver and Expense ReimbursementfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund Inc0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00990.0099falsefalsefalsetruefalse2truetruetrue0.01960.0196falsefalsefalsetruefalse3truetruetrue0.01930.0193falsefalsefalsetruefalse4truetruetrue0.01430.0143falsefalsefalsetruefalse5truetruetrue0.00830.0083falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement1<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The Fund's transfer agent has voluntarily agreed to limit its fees for all classes to 0.35% of average annual net assets per class. That undertaking may be amended or withdrawn after one year from the date of this prospectus.</p>56Annual Fund Operating Expenses Equity Fund Inc Oppenheimer Equity Fund IncUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*Rowdei_LegalEntityAxisAxisoppenheimer_S000008467MemberfalsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]9false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Example.</b> The following 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 a class of shares of the Fund for the time periods indicated. 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 expenses would be as follows: </p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalseExpense Example Narrative [Text Block]10false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>If shares are redeemed</b></p>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalseExpense Example by, Year, Caption [Text]11false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/ExpenseExampleAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/ExpenseExampleAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>truehttp://oppenheimer/role/ExpenseExampleAAAAfalsefalse020032 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue671671falsefalsefalsetruefalse2truefalsetrue701701falsefalsefalsetruefalse3truefalsetrue298298falsefalsefalsetruefalse4truefalsetrue247247falsefalsefalsetruefalse5truefalsetrue8585falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse1 YearfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue874874falsefalsefalsetruefalse2truefalsetrue966966falsefalsefalsetruefalse3truefalsetrue614614falsefalsefalsetruefalse4truefalsetrue466466falsefalsefalsetruefalse5truefalsetrue266266falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse3 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10931093falsefalsefalsetruefalse2truefalsetrue13571357falsefalsefalsetruefalse3truefalsetrue10561056falsefalsefalsetruefalse4truefalsetrue809809falsefalsefalsetruefalse5truefalsetrue462462falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse5 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue17241724falsefalsefalsetruefalse2truefalsetrue19241924falsefalsefalsetruefalse3truefalsetrue22852285falsefalsefalsetruefalse4truefalsetrue17771777falsefalsefalsetruefalse5truefalsetrue10301030falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse10 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass AEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue671671falsefalsefalsetruefalse2truefalsetrue874874falsefalsefalsetruefalse3truefalsetrue10931093falsefalsefalsetruefalse4truefalsetrue17241724falsefalsefalsetruefalseOthernanafalsefalseClass A2falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023202Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue701701falsefalsefalsetruefalse2truefalsetrue966966falsefalsefalsetruefalse3truefalsetrue13571357falsefalsefalsetruefalse4truefalsetrue19241924falsefalsefalsetruefalseOthernanafalsefalseClass B3falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023203Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue298298falsefalsefalsetruefalse2truefalsetrue614614falsefalsefalsetruefalse3truefalsetrue10561056falsefalsefalsetruefalse4truefalsetrue22852285falsefalsefalsetruefalseOthernanafalsefalseClass C4falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Nrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023204Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass NEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue247247falsefalsefalsetruefalse2truefalsetrue466466falsefalsefalsetruefalse3truefalsetrue809809falsefalsefalsetruefalse4truefalsetrue17771777falsefalsefalsetruefalseOthernanafalsefalseClass N5falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023205Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue8585falsefalsefalsetruefalse2truefalsetrue266266falsefalsefalsetruefalse3truefalsetrue462462falsefalsefalsetruefalse4truefalsetrue10301030falsefalsefalsetruefalseOthernanafalsefalseClass Y45Expense Example Oppenheimer Equity Fund Inc Equity Fund Inc (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalseExpense Example, With Redemption [Table]12false0rr_ExpenseExampleNoRedemptionByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>If shares are not redeemed </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalseExpense Example, No Redemption, By Year, Caption [Text]13false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/ExpenseExampleNoRedemptionAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/ExpenseExampleNoRedemptionAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>truehttp://oppenheimer/role/ExpenseExampleNoRedemptionAAAAfalsefalse020042 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue671671falsefalsefalsetruefalse2truefalsetrue201201falsefalsefalsetruefalse3truefalsetrue198198falsefalsefalsetruefalse4truefalsetrue147147falsefalsefalsetruefalse5truefalsetrue8585falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse1 YearfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue874874falsefalsefalsetruefalse2truefalsetrue666666falsefalsefalsetruefalse3truefalsetrue614614falsefalsefalsetruefalse4truefalsetrue466466falsefalsefalsetruefalse5truefalsetrue266266falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse3 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue10931093falsefalsefalsetruefalse2truefalsetrue11571157falsefalsefalsetruefalse3truefalsetrue10561056falsefalsefalsetruefalse4truefalsetrue809809falsefalsefalsetruefalse5truefalsetrue462462falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse5 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue17241724falsefalsefalsetruefalse2truefalsetrue19241924falsefalsefalsetruefalse3truefalsetrue22852285falsefalsefalsetruefalse4truefalsetrue17771777falsefalsefalsetruefalse5truefalsetrue10301030falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse10 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass AEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue671671falsefalsefalsetruefalse2truefalsetrue874874falsefalsefalsetruefalse3truefalsetrue10931093falsefalsefalsetruefalse4truefalsetrue17241724falsefalsefalsetruefalseOthernanafalsefalseClass A2falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023202Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass BEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue201201falsefalsefalsetruefalse2truefalsetrue666666falsefalsefalsetruefalse3truefalsetrue11571157falsefalsefalsetruefalse4truefalsetrue19241924falsefalsefalsetruefalseOthernanafalsefalseClass B3falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023203Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass CEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue198198falsefalsefalsetruefalse2truefalsetrue614614falsefalsefalsetruefalse3truefalsetrue10561056falsefalsefalsetruefalse4truefalsetrue22852285falsefalsefalsetruefalseOthernanafalsefalseClass C4falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Nrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023204Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass NEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue147147falsefalsefalsetruefalse2truefalsetrue466466falsefalsefalsetruefalse3truefalsetrue809809falsefalsefalsetruefalse4truefalsetrue17771777falsefalsefalsetruefalseOthernanafalsefalseClass N5falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023205Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberClass YEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue8585falsefalsefalsetruefalse2truefalsetrue266266falsefalsefalsetruefalse3truefalsetrue462462falsefalsefalsetruefalse4truefalsetrue10301030falsefalsefalsetruefalseOthernanafalsefalseClass Y45Expense Example, No Redemption Oppenheimer Equity Fund Inc Equity Fund Inc (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalseExpense Example, No Redemption [Table]14false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Portfolio Turnover.</b> The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate 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 the 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 81% of the average value of its portfolio.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover [Text Block]15false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Principal Investment Strategies.</b> The Fund invests primarily in equity securities of U.S. companies. Under normal market conditions, the Fund invests at least 80% of its net assets in equity securities (including borrowings for investment purposes). This non-fundamental investment policy will not be changed without 60 days' advance notice to shareholders. The Fund may also invest in debt securities when the portfolio managers believe it may be advantageous in seeking high total return. The Fund normally invests primarily in medium- and large-capitalization companies that are more established than smaller companies, but may invest in smaller-capitalization companies to the extent that the Fund considers appropriate. The Fund may also invest in companies located outside of the United States.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">In selecting investments for the Fund's portfolio, the portfolio managers use an investment process that combines both "value" and "growth" investment styles. A value strategy seeks to identify issuers whose securities are undervalued in the marketplace. The portfolio managers consider a number of factors such as the ratio of the stock's price to the company's earnings, the value of its assets and its management strength. A low price/earnings ratio may indicate that a stock is undervalued. A growth style looks for companies whose stock price may increase at a greater rate than the overall market. These issuers may be entering a growth phase, marked by increases in earnings, sales, cash flows, or other factors that suggest that the stock price may increase more rapidly.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The portfolio managers construct the portfolio using a "bottom up" analysis of individual issuers rather than overall market or industry conditions or trends. This approach includes fundamental analysis of a company's financial statements and management structure and consideration of the company's operations, product development and industry position. Because total return has two components, capital appreciation and income, the portfolio managers might select stocks that offer the potential for either or both of those elements. The portfolio managers focus on factors that may vary over time and in particular cases. Currently they look for:</p> <ul><li> <p style="font-size:12;padding-top:0;padding-bottom:0;padding-left:0;">Individual stocks that are attractive based on fundamental stock analysis and company characteristics;</p> </li><li> <p style="font-size:12;padding-top:0;padding-bottom:0;padding-left:0;">Growth stocks of companies that have projected earnings in excess of the average for their sector and industry;</p> </li><li> <p style="font-size:12;padding-top:0;padding-bottom:0;padding-left:0;">Value stocks with compelling long-term business prospects.</p> </li></ul> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">Additionally, with respect to the growth strategy, the portfolio manager employs a "top-down" approach to analyze relevant economic conditions and industry sectors.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The portfolio managers monitor individual issuers for changes in business fundamentals and valuation, which may trigger a decision to sell a security, but does not require such a decision.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal 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: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy Narrative [Text Block]16false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Principal Risks.</b> The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or from poor security selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. <i>These risks mean that you can lose money by investing in the Fund.</i> </p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Main Risks of Investing in Stock.</b> The value of the Fund's portfolio may be affected by changes in the stock markets. Stock markets may experience significant short-term volatility and may fall sharply at times. Different stock markets may behave differently from each other and U.S. stock markets may move in the opposite direction from one or more foreign stock markets.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The prices of individual stocks generally do not all move in the same direction at the same time and a variety of factors can affect the price of a particular company's stock. These factors may include, but are not limited to: poor earnings reports, a loss of customers, litigation against the company, general unfavorable performance of the company's sector or industry, or changes in government regulations affecting the company or its industry.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> At times, the Fund may emphasize investments in a particular industry or economic or market sector. To the extent that the Fund increases its emphasis on investments in a particular industry or sector, the value of its investments may fluctuate more in response to events affecting that industry or sector, such as changes in economic conditions, government regulations, availability of basic resources or supplies, or other events that affect that industry or sector more than others. </p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Main Risks of Growth Investing.</b> If a growth company's earnings or stock price fails to increase as anticipated, or if its business plans do not produce the expected results, its securities may decline sharply. Growth companies may be newer or smaller companies that may experience greater stock price fluctuations and risks of loss than larger, more established companies. Newer growth companies tend to retain a large part of their earnings for research, development or investments in capital assets. Therefore, they may not pay any dividends for some time. Growth investing has gone in and out of favor during past market cycles and is likely to continue to do so. During periods when growth investing is out of favor or when markets are unstable, it may be more difficult to sell growth company securities at an acceptable price. Growth stocks may also be more volatile than other securities because of investor speculation.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Main Risks of Value Investing.</b> Value investing entails the risk that if the market does not recognize that the Fund's securities are undervalued, the prices of those securities might not appreciate as anticipated. A value approach could also result in fewer investments that increase rapidly during times of market gains and could cause the Fund to underperform funds that use a growth or non-value approach to investing. Value investing has gone in and out of favor during past market cycles and when value investing is out of favor or when markets are unstable, the securities of "value" companies may underperform the securities of "growth" companies.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Main Risks of Foreign Investing.</b> Foreign securities are subject to special risks. Foreign issuers are usually not subject to the same accounting and disclosure requirements that U.S. companies are subject to, which may make it difficult for the Fund to evaluate a foreign company's operations or financial condition. A change in the value of a foreign currency against the U.S. dollar will result in a change in the U.S. dollar value of securities denominated in that foreign currency and in the value of any income or distributions the Fund may receive on those securities. The value of foreign investments may be affected by exchange control regulations, foreign taxes, higher transaction and other costs, delays in the settlement of transactions, changes in economic or monetary policy in the United States or abroad, expropriation or nationalization of a company's assets, or other political and economic factors. These risks may be greater for investments in developing or emerging market countries.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Who Is the Fund Designed For?</b> The Fund is designed for investors seeking total investment return mainly from capital appreciation over the long term. Those investors should be willing to assume the risks of short-term share price fluctuations that are typical for a moderately aggressive fund that invests primarily in common stocks. Since the Fund's income level will fluctuate, it is not designed for investors needing an assured level of current income. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b> An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. </b> </p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalseRisk Narrative [Text Block]17false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>The Fund's Past Performance.</b> The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance. The Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More recent performance information is available by calling the toll-free number on the back of this prospectus and on the Fund's website: https://www.oppenheimerfunds.com/fund/investors/overview/EquityFundInc </p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalsePerformance Narrative [Text Block]18false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsefalseBarChart1.jpg<div style="display:none">~http://xbrl.sec.gov/rr/role/BarChartData column dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsehttp://xbrl.sec.gov/rr/role/BarChartDatafalsefalse020050 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxisoppenheimer_S000008467MemberColumndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberOppenheimer Equity Fund IncEquity Fund IncUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1043-0.1043falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20010rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1043-0.1043falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20012falseRowprimaryElement*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.178-0.178falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20020rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.178-0.178falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20023falseRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.26260.2626falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20030rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.26260.2626falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20034falseRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10730.1073falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20040rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10730.1073falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20045falseRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.08160.0816falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20050rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.08160.0816falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20056falseRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10340.1034falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20060rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10340.1034falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20067falseRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10730.1073falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20070rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10730.1073falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20078falseRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.4383-0.4383falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20080rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.4383-0.4383falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 20089falseRowprimaryElement*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38790.3879falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 20090rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38790.3879falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 200910falseRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12010.1201falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 20100rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12010.1201falsefalsefalsetruefalseOthernanafalsefalseAnnual Return 2010110Annual Total Returns UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxisoppenheimer_S000008467MemberColumndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]19false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">Sales charges and taxes are not included and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 19.35% (2nd Qtr 09) and the lowest return was -27.29% (4th Qtr 08).</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseBar Chart Closing [Text Block]20false0rr_PerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Average Annual Total Returns</b> for the periods ended December 31, 2010 </p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c -Subsection b falsefalsePerformance Table Heading21false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The following table shows the average annual total returns for each class of the Fund's shares. After-tax returns are calculated using the highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes. Your actual after-tax returns, depending on your individual tax situation, may differ from those shown and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for only one class and after-tax returns for other classes will vary.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____). For a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by paragraph (c)(2)(i) (e.g., by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Subsection b falsefalsePerformance Table Narrative22false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://oppenheimer/role/PerformanceTableDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>falsefalse<div style="display:none">~ http://oppenheimer/role/PerformanceTableDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact oppenheimer_S000008467Member ~</div>truehttp://oppenheimer/role/PerformanceTableDataAAAAfalsefalse020062 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member3false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition 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Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member5false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00110.0011falsefalsefalsetruefalse2truetruetrue-0.0076-0.0076falsefalsefalsetruefalse3truetruetrue-0.0005-0.0005falsefalsefalsetruefalse4truetruetrue0.00040.0004falsefalsefalsetruefalse5truetruetrue0.00390.0039falsefalsefalsetruefalse6truetruetrue0.00860.0086falsefalsefalsetruefalse7truetruetrue0.01440.0144falsefalsefalsetruefalse8truetruetrue0.02290.0229falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10truetruetrue0.02590.0259falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse5 YearsfalsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467Member6false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01140.0114falsefalsefalsetruefalse2truetruetrue0.00280.0028falsefalsefalsetruefalse3truetruetrue0.00780.0078falsefalsefalsetruefalse4truetruetrue0.0120.012falsefalsefalsetruefalse5truetruetrue0.00820.0082falsefalsefalsetruefalse6truetruetrue0.0170.017falsefalsefalsetruefalse7truetruetrue0.01860.0186falsefalsefalsetruefalse8truetruetrue0.01420.0142falsefalsefalsetruefalse9truetruetrue0.02070.0207[1]falsefalsefalsetruefalse10truetruetrue0.01830.0183falsefalsefalsetruefalse11truetruetrue0.02540.0254[1]falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse10 years (or life of class, if less)falsefalseOppenheimer Equity Fund Incdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_S000008467Memberdei_LegalEntityAxisexplicitMemberOppenheimer Equity Fund IncfalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberClass AEquity Fund IncBefore TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001947-10-021947-10-02falsefalsetruetruefalse2truetruetrue0.05570.0557falsefalsefalsetruefalse3truetruetrue0.00110.0011falsefalsefalsetruefalse4truetruetrue0.01140.0114falsefalsefalsetruefalseOthernanafalsefalseClass A2falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberClass AEquity Fund IncAfter Taxes on DistributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.05480.0548falsefalsefalsetruefalse3truetruetrue-0.0076-0.0076falsefalsefalsetruefalse4truetruetrue0.00280.0028falsefalsefalsetruefalseOthernanafalsefalseClass A After Taxes on Distributions3falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023201Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Sale of Fund Sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberClass AEquity Fund IncAfter Taxes on Distributions and Sale of Fund SharesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.03740.0374falsefalsefalsetruefalse3truetruetrue-0.0005-0.0005falsefalsefalsetruefalse4truetruetrue0.00780.0078falsefalsefalsetruefalseOthernanafalsefalseClass A After Taxes on Distributions and Sale of Fund Shares4falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023202Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberClass BEquity Fund IncBefore TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse001993-05-031993-05-03falsefalsetruetruefalse2truetruetrue0.05840.0584falsefalsefalsetruefalse3truetruetrue0.00040.0004falsefalsefalsetruefalse4truetruetrue0.0120.012falsefalsefalsetruefalseOthernanafalsefalseClass B5falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass 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Nrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_C000023204Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberClass NEquity Fund IncBefore TaxesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002001-03-012001-03-01falsefalsetruetruefalse2truetruetrue0.10380.1038falsefalsefalsetruefalse3truetruetrue0.00860.0086falsefalsefalsetruefalse4truetruetrue0.0170.017falsefalsefalsetruefalseOthernanafalsefalseClass N7falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalseClass 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Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseS&P 500 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_Benchmark004AAAAMemberrr_PerformanceMeasureAxisexplicitMemberShare ClassesEquity Fund IncS&P 500 Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.02070.0207falsefalsefalsetruefalseOthernanafalsefalseS&P 500 Index (reflects no deduction for fees, expenses or taxes)10falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00truefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseRussell 1000 Indexrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_Russ1kIndexAAAAMemberrr_PerformanceMeasureAxisexplicitMemberShare ClassesEquity Fund IncRussell 1000 IndexStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.1610.161falsefalsefalsetruefalse3truetruetrue0.02590.0259falsefalsefalsetruefalse4truetruetrue0.01830.0183falsefalsefalsetruefalseOthernanafalsefalseRussell 1000 Index11falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00truefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseEquity Fund Incdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseRussell 1000 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldioppenheimer_russ1kindex01AAAAMemberrr_PerformanceMeasureAxisexplicitMemberShare ClassesEquity Fund IncRussell 1000 Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.02540.0254falsefalsefalsetruefalseOthernanafalsefalseRussell 1000 Index (reflects no deduction for fees, expenses or taxes)1<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">From 02-28-01</p>411Average Annual Total Returns Oppenheimer Equity Fund Inc Equity Fund IncUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxisoppenheimer_S000008467MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]121Risk/Return Summary (Equity Fund Inc, Oppenheimer Equity Fund Inc)UnKnownUnKnownUnKnownUnKnownfalsetrue