2.2.0.25truefalse001801 - Document - Risk/Return Summary {Unlabeled} - (Legg Mason ClearBridge Equity Income Builder Fund)falsefalsetrue1falsefalseUSDtruefalse{dei_LegalEntityAxis} : S000016665 Member 4/29/2011 - 4/29/2011 USD ($) $Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik000880366_S000016665Memberhttp://www.sec.gov/CIK0000880366duration2011-04-29T00:00:002011-04-29T00:00:00falsefalsecik000880366_S000016665Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 24px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="6">Legg Mason </font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="6">ClearBridge </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6">Equity </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6">Income </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6">Builder </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6">Fund</font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalseRisk/Return [Heading]4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6"><a name="tx145172_1"> </a>Investment objective </font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment 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 [Heading]5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 6px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="3">The fund's primary investment objective is to provide a high level of current income.</font></p></div> </div>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]6false0rr_ObjectiveSecondaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 6px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="3">Long-term capital appreciation is its secondary objective.</font></p></div> </div>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, Secondary [Text Block]7false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6"><a name="tx145172_2"> </a>Fees and expenses of the fund </font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This 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. Shareholder Fees (fees paid directly from your investment) Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then 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, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalseExpense [Heading]8false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 18px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The accompanying table describes the fees and expenses that you may pay if you buy and hold shares of the fund. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"><font class="_mt"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least&nbsp;<font class="_mt">$25,000</font> in funds sold by Legg Mason Investor Services, LLC ("LMIS"), the fund's distributor.</font></font>More information about these and other discounts is available from your financial intermediary, in this Prospectus on page 20 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 60 under the heading "Sales Charge Waivers and Reductions." </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Effective July 1, 2011, Class B shares will no longer be offered for purchase by new and existing investors. Your financial intermediary may no longer offer Class B shares as of an earlier date. Class B shares will continue to be available for incoming exchanges and for dividend reinvestment. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Class 1 shares of the fund are not available for purchases or incoming exchanges.</font></p></div> </div>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]9false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 18px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">&nbsp;<font color="#508541" class="_mt"><strong>Shareholder fees </strong><font style="font-family: ARIAL;" class="_mt" size="1">(paid directly from your investment)</font><font style="font-family: ARIAL;" class="_mt" size="2"><b> 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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. 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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). 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. 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available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00740.0074falsefalsefalsetruefalse3truetruetrue0.00740.0074falsefalsefalsetruefalse4truetruetrue0.00740.0074falsefalsefalsetruefalse5truetruetrue0.00740.0074falsefalsefalsetruefalse6truetruetrue0.00740.0074falsefalsefalsetruefalse7truetruetrue0.00740.0074falsefalsefalsetruefalse8truetruetrue0.00740.0074falsefalsefalsetruefalse9truetruetrue0.00740.0074falsefalsefalsetruefalseOtherrr: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 Fees0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00740.0074falsefalsefalsetruefalse2truetruetrue0.00740.0074falsefalsefalsetruefalse3truetruetrue0.00740.0074falsefalsefalsetruefalse4truetruetrue0.00740.0074falsefalsefalsetruefalse5truetruetrue0.00740.0074falsefalsefalsetruefalse6truetruetrue0.00740.0074falsefalsefalsetruefalse7truetruetrue0.00740.0074falsefalsefalsetruefalse8truetruetrue0.00740.0074falsefalsefalsetruefalse9truetruetrue0.00740.0074falsefalsefalsetruefalseOthernanafalsefalseManagement Fees2falseRowprimaryElement*6false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.01000.0100falsefalsefalsetruefalse4truetruetrue0.000.00falsefalsefalsetruefalse5truetruetrue0.00250.0025falsefalsefalsetruefalse6truetruetrue0.00500.0050falsefalsefalsetruefalse7truetruetrue0.01000.0100falsefalsefalsetruefalse8truetruetrue0.000.00falsefalsefalsetruefalse9truetruetrue0.000.00falsefalsefalsetruefalseOtherrr: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 service (12b-1) fees0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.01000.0100falsefalsefalsetruefalse4truetruetrue0.00250.0025falsefalsefalsetruefalse5truetruetrue0.00500.0050falsefalsefalsetruefalse6truetruetrue0.01000.0100falsefalsefalsetruefalse7truetruetrue0.000.00falsefalsefalsetruefalse8truetruetrue0.000.00falsefalsefalsetruefalse9truetruetrue0.000.00falsefalsefalsetruefalseOthernanafalsefalseDistribution and service (12b-1) fees3falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00310.0031[2]falsefalsefalsetruefalse2truetruetrue0.00440.0044[2]falsefalsefalsetruefalse3truetruetrue0.00260.0026[2]falsefalsefalsetruefalse4truetruetrue0.00150.0015falsefalsefalsetruefalse5truetruetrue0.00300.0030[1]falsefalsefalsetruefalse6truetruetrue0.00300.0030[1]falsefalsefalsetruefalse7truetruetrue0.00300.0030[1]falsefalsefalsetruefalse8truetruetrue0.00100.0010[1]falsefalsefalsetruefalse9truetruetrue0.00280.0028[1]falsefalsefalsetruefalseOtherrr: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 falsefalseOther expenses0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00310.0031[1]falsefalsefalsetruefalse2truetruetrue0.00440.0044[1]falsefalsefalsetruefalse3truetruetrue0.00260.0026[1]falsefalsefalsetruefalse4truetruetrue0.00300.0030[2]falsefalsefalsetruefalse5truetruetrue0.00300.0030[2]falsefalsefalsetruefalse6truetruetrue0.00300.0030[2]falsefalsefalsetruefalse7truetruetrue0.00150.0015falsefalsefalsetruefalse8truetruetrue0.00100.0010[2]falsefalsefalsetruefalse9truetruetrue0.00280.0028[2]falsefalsefalsetruefalseOthernanafalsefalseOther expenses4falseRowprimaryElement*8false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.01300.0130falsefalsefalsetruefalse2truetruetrue0.01930.0193falsefalsefalsetruefalse3truetruetrue0.02000.0200falsefalsefalsetruefalse4truetruetrue0.00890.0089falsefalsefalsetruefalse5truetruetrue0.01290.0129falsefalsefalsetruefalse6truetruetrue0.01540.0154falsefalsefalsetruefalse7truetruetrue0.02040.0204falsefalsefalsetruefalse8truetruetrue0.00840.0084falsefalsefalsetruefalse9truetruetrue0.01020.0102falsefalsefalsetruefalseOtherrr: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 expenses0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01300.0130falsefalsefalsetruefalse2truetruetrue0.01930.0193falsefalsefalsetruefalse3truetruetrue0.02000.0200falsefalsefalsetruefalse4truetruetrue0.01290.0129falsefalsefalsetruefalse5truetruetrue0.01540.0154falsefalsefalsetruefalse6truetruetrue0.02040.0204falsefalsefalsetruefalse7truetruetrue0.00890.0089falsefalsefalsetruefalse8truetruetrue0.00840.0084falsefalsefalsetruefalse9truetruetrue0.01020.0102falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses5falseRowprimaryElement*9false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0015-0.0015[3]falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011[3]falsefalsefalsetruefalse3truetruetrue-0.0005-0.0005[3]falsefalsefalsetruefalse4truetruetrue-0.0006-0.0006[3]falsefalsefalsetruefalse5falsetruetrue00&nbsp;[3]falsefalsefalsetruefalse6falsetruetrue00&nbsp;[3]falsefalsefalsetruefalse7falsetruetrue00&nbsp;[3]falsefalsefalsetruefalse8truetruetrue-0.0001-0.0001[3]falsefalsefalsetruefalse9truetruetrue-0.0012-0.0012[3]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 falsefalseFees forgone and/or expenses reimbursed0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[3]1truetruetrue-0.0015-0.0015falsefalsefalsetruefalse2truetruetrue-0.0011-0.0011falsefalsefalsetruefalse3truetruetrue-0.0005-0.0005falsefalsefalsetruefalse4falsetruetrue00&nbsp;&nbsp;falsefalsefalsetruefalse5falsetruetrue00&nbsp;&nbsp;falsefalsefalsetruefalse6falsetruetrue00&nbsp;&nbsp;falsefalsefalsetruefalse7truetruetrue-0.0006-0.0006falsefalsefalsetruefalse8truetruetrue-0.0001-0.0001falsefalsefalsetruefalse9truetruetrue-0.0012-0.0012falsefalsefalsetruefalseOthernanafalsefalseFees forgone and/or expenses reimbursed6falseRowprimaryElement*10false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.01150.0115[3]falsefalsefalsetruefalse2truetruetrue0.01820.0182[3]falsefalsefalsetruefalse3truetruetrue0.01950.0195[3]falsefalsefalsetruefalse4truetruetrue0.00830.0083[3]falsefalsefalsetruefalse5truetruetrue0.01290.0129[3]falsefalsefalsetruefalse6truetruetrue0.01540.0154[3]falsefalsefalsetruefalse7truetruetrue0.02040.0204[3]falsefalsefalsetruefalse8truetruetrue0.00830.0083[3]falsefalsefalsetruefalse9truetruetrue0.00900.0090[3]falsefalsefalsetruefalseOtherrr: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 forgoing fees and/or reimbursing expenses0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[3]1truetruetrue0.01150.0115falsefalsefalsetruefalse2truetruetrue0.01820.0182falsefalsefalsetruefalse3truetruetrue0.01950.0195falsefalsefalsetruefalse4truetruetrue0.01290.0129falsefalsefalsetruefalse5truetruetrue0.01540.0154falsefalsefalsetruefalse6truetruetrue0.02040.0204falsefalsefalsetruefalse7truetruetrue0.00830.0083falsefalsefalsetruefalse8truetruetrue0.00830.0083falsefalsefalsetruefalse9truetruetrue0.00900.0090falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses after forgoing fees and/or reimbursing expenses1 "Other expenses" have been restated to reflect higher current fees.2 "Other expenses" for Class FI, Class R, Class R1, Class IS and Class 1 shares are estimated for the current fiscal year because no Class FI, Class R, Class R1, Class IS and Class 1 shares were outstanding during the fund's last fiscal year.3 The manager has agreed to forgo fees and/or reimburse operating expenses (other than brokerage, interest, taxes, extraordinary expenses and acquired fund fees and expenses) so that total annual operating expenses are not expected to exceed 1.15% for Class A shares, 1.82% for Class B shares, 1.95% for Class C shares, 1.35% for Class FI shares, 1.60% for Class R shares, 2.10% for Class R1 shares and 0.83% for Class I shares. In addition, total annual fund operating expenses for Class IS shares will not exceed total annual fund operating expenses for Class I shares and total annual fund operating expenses for Class 1 shares are expected to be at least 0.25% lower than total annual fund operating expenses for Class A shares. These arrangements cannot be terminated prior to December 31, 2012 without the Board of Trustees' consent. The manager is permitted to recapture amounts forgone or reimbursed to a class during the same fiscal year if the class' total annual operating expenses have fallen to a level below the limits described above.96Annual Fund Operating Expenses - Legg Mason ClearBridge Equity Income Builder FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik000880366_S000016665MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]13false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 18px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Example </b></font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalseExpense Example [Heading]14false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">This 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: </font></p> <p style="margin-top: 0px; margin-bottom: 0px; font-size: 4px;">&nbsp;</p> <div> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="2%" align="left"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"><font style="font-family: Times New Roman;" class="_mt" color="#666666" size="2"> </font><font style="font-family: WINGDINGS;" class="_mt" color="#666666" size="2">&#376;</font><font style="font-family: Times New Roman;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font></font></td> <td valign="top" width="1%"><font class="_mt" size="1">&nbsp;</font></td> <td valign="top" align="left"> <p align="left"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">You invest $10,000 in the fund for the time periods indicated </font></p></td></tr></table></div> <p style="margin-top: 4px; margin-bottom: 0px; font-size: 1px;">&nbsp;</p> <div> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="2%" align="left"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"><font style="font-family: Times New Roman;" class="_mt" color="#666666" size="2"> </font><font style="font-family: WINGDINGS;" class="_mt" color="#666666" size="2">&#376;</font><font style="font-family: Times New Roman;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font></font></td> <td valign="top" width="1%"><font class="_mt" size="1">&nbsp;</font></td> <td valign="top" align="left"> <p align="left"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Your investment has a 5% return each year and the fund's operating expenses remain the same </font></p></td></tr></table></div> <p style="margin-top: 0px; margin-bottom: 0px; font-size: 4px;">&nbsp;</p> <div> <table style="border-collapse: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr><td valign="top" width="2%" align="left"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"><font style="font-family: Times New Roman;" class="_mt" color="#666666" size="2"> </font><font style="font-family: WINGDINGS;" class="_mt" color="#666666" size="2">&#376;</font><font style="font-family: Times New Roman;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font></font></td> <td valign="top" width="1%"><font class="_mt" size="1">&nbsp;</font></td> <td valign="top" align="left"> <p align="left"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">You reinvest all distributions and dividends without a sales charge </font></p></td></tr></table></div> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font></p></div> </div>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]15false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;"><strong><font style="font-family: Arial;" class="_mt" color="#508541" size="2">Number of years you<br />own your shares ($)</font></strong></p></div>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]16false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://www.leggmason.com/role/ScheduleExpenseExampleTransposedLeggMasonClearbridgeEquityIncomeBuilderFund row period compact * row primary compact * column dei_LegalEntityAxis compact cik000880366_S000016665Member column rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;" &gt;~ http://www.leggmason.com/role/ScheduleExpenseExampleTransposedLeggMasonClearbridgeEquityIncomeBuilderFund row period compact * row primary compact * column dei_LegalEntityAxis compact cik000880366_S000016665Member column rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>truehttp://www.leggmason.com/role/ScheduleExpenseExampleTransposedLeggMasonClearbridgeEquityIncomeBuilderFundfalsefalse001804 - Schedule - Expense Example {Transposed} - {Legg Mason ClearBridge Equity Income Builder Fund}truefalsefalse1falseColumnperiodPeriod*ColumnprimaryElement*5false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue685685falsefalsefalsetruefalse2truefalsetrue685685falsefalsefalsetruefalse3truefalsetrue298298falsefalsefalsetruefalse4truefalsetrue8585falsefalsefalsetruefalse5truefalsetrue131131falsefalsefalsetruefalse6truefalsetrue157157falsefalsefalsetruefalse7truefalsetrue207207falsefalsefalsetruefalse8truefalsetrue8585falsefalsefalsetruefalse9truefalsetrue9292falsefalsefalsetruefalseMonetaryrr: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 yearduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*6false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue951951falsefalsefalsetruefalse2truefalsetrue895895falsefalsefalsetruefalse3truefalsetrue625625falsefalsefalsetruefalse4truefalsetrue279279falsefalsefalsetruefalse5truefalsetrue408408falsefalsefalsetruefalse6truefalsetrue487487falsefalsefalsetruefalse7truefalsetrue639639falsefalsefalsetruefalse8truefalsetrue267267falsefalsefalsetruefalse9truefalsetrue313313falsefalsefalsetruefalseMonetaryrr: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 yearsduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*7false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue12371237falsefalsefalsetruefalse2truefalsetrue11311131falsefalsefalsetruefalse3truefalsetrue10781078falsefalsefalsetruefalse4truefalsetrue489489falsefalsefalsetruefalse5truefalsetrue707707falsefalsefalsetruefalse6truefalsetrue839839falsefalsefalsetruefalse7truefalsetrue10981098falsefalsefalsetruefalse8truefalsetrue465465falsefalsefalsetruefalse9truefalsetrue552552falsefalsefalsetruefalseMonetaryrr: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 yearsduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$4falseColumnperiodPeriod*ColumnprimaryElement*8false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue20492049falsefalsefalsetruefalse2truefalsetrue20822082falsefalsefalsetruefalse3truefalsetrue23342334falsefalsefalsetruefalse4truefalsetrue10921092falsefalsefalsetruefalse5truefalsetrue15561556falsefalsefalsetruefalse6truefalsetrue18351835falsefalsefalsetruefalse7truefalsetrue23692369falsefalsefalsetruefalse8truefalsetrue10371037falsefalsefalsetruefalse9truefalsetrue12381238falsefalsefalsetruefalseMonetaryrr: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. 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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 yearduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*6false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue951951falsefalsefalsetruefalse2truefalsetrue595595falsefalsefalsetruefalse3truefalsetrue625625falsefalsefalsetruefalse4truefalsetrue279279falsefalsefalsetruefalse5truefalsetrue408408falsefalsefalsetruefalse6truefalsetrue487487falsefalsefalsetruefalse7truefalsetrue639639falsefalsefalsetruefalse8truefalsetrue267267falsefalsefalsetruefalse9truefalsetrue313313falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. 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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 yearsduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$4falseColumnperiodPeriod*ColumnprimaryElement*8false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue20492049falsefalsefalsetruefalse2truefalsetrue20822082falsefalsefalsetruefalse3truefalsetrue23342334falsefalsefalsetruefalse4truefalsetrue10921092falsefalsefalsetruefalse5truefalsetrue15561556falsefalsefalsetruefalse6truefalsetrue18351835falsefalsefalsetruefalse7truefalsetrue23692369falsefalsefalsetruefalse8truefalsetrue10371037falsefalsefalsetruefalse9truefalsetrue12381238falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. 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ISUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue8585falsefalsefalsetruefalse2truefalsetrue267267falsefalsefalsetruefalse3truefalsetrue465465falsefalsefalsetruefalse4truefalsetrue10371037falsefalsefalsetruefalseOthernanafalsefalseClass IS9falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass 1rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000097989Memberrr_ProspectusShareClassAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass 1Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue9292falsefalsefalsetruefalse2truefalsetrue313313falsefalsefalsetruefalse3truefalsetrue552552falsefalsefalsetruefalse4truefalsetrue12381238falsefalsefalsetruefalseOthernanafalsefalseClass 149Expense Example, No Redemption - Legg Mason ClearBridge Equity Income Builder Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*Rowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*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]19false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Portfolio turnover.</b></font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose 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 5 -Subsection instructions falsefalsePortfolio Turnover [Heading]20false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was&nbsp;<font class="_mt">60%</font> of the average value of its portfolio.</font></p></div> </div>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]21false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 18px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6"><a name="tx145172_3"> </a>Principal investment strategies </font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal 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 [Heading]22false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 2px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Under normal circumstances, the fund will invest at least 80% of the value of its net assets in equity securities or other investments with similar economic characteristics. A significant portion of the fund's portfolio will consist of equity securities that pay dividends. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The fund may invest up to 50% of its net assets in equity securities of foreign issuers. The foreign issuers in which the fund may invest include issuers that are organized outside the United States and conduct their operations in the United States and other countries (commonly known as "multi-national companies") and other foreign issuers with market capitalizations generally of at least $10 billion. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The portfolio managers believe that high quality companies with strong balance sheets coupled with strong dividend profiles are attractive candidates for long-term investment. The portfolio managers typically emphasize dividend-paying equity securities, with current dividend levels being the main focus and dividend growth over time being secondary. The fund may invest in issuers of any size. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The fund may invest up to 20% of its net assets in fixed income securities. The fund may invest in fixed income securities of any quality, including lower-rated, high-yielding debt securities (commonly known as "junk bonds"). The fund may invest in fixed income securities when the portfolio managers believe such securities provide attractive income opportunities.</font></p></div> </div>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]23false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 18px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6"><a name="tx145172_4"> </a>Certain risks </font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalseRisk [Heading]24false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 2px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Risk is inherent in all investing. There is no assurance that the fund will meet its investment objectives. The value of your investment in the fund, as well as the amount of return you receive on your investment, may fluctuate significantly.&nbsp;<font class="_mt">You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments.</font> The following is a summary description of certain risks of investing in the fund. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Stock market and interest rate risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> The securities markets are volatile and the market prices of the fund's securities may decline generally. Securities fluctuate in price based on changes in a company's financial condition and overall market and economic conditions. If the market prices of the securities owned by the fund fall, the value of your investment in the fund will decline. The recent financial crisis has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the United States calls for changes in many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Dividend-paying stock risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> The fund's emphasis on dividend-paying stocks involves the risk that such stocks may fall out of favor with investors and underperform the market. Also, a company may reduce or eliminate its dividend. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Foreign investments risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> The fund's investments in securities of foreign issuers involve greater risk than investments in securities of U.S. issuers. Foreign countries in which the fund may invest may have markets that are less liquid and more volatile than U.S. markets and may suffer from political or economic instability. In some foreign countries, less information is available about issuers and markets because of less rigorous accounting and regulatory standards than in the United States. Currency fluctuations could erase investment gains or add to investment losses. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The risks of investing in foreign securities are heightened when investing in issuers in emerging market countries. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Credit risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> If an issuer or guarantor of a security held by the fund or a counterparty to a financial contract with the fund defaults or is downgraded, or is perceived to be less creditworthy, or if the value of the assets underlying a security declines, the value of your investment will typically decline. Junk bonds have a higher risk of default and are considered speculative. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Prepayment or call risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> Many issuers have a right to prepay their securities. If interest rates fall, an issuer may exercise this right. If this happens, the fund will be forced to reinvest prepayment proceeds at a time when yields on securities available in the market are lower than the yield on the prepaid security. The fund may also lose any premium it paid on the security. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Extension risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. This may drive the prices of these securities down because their interest rates are lower than the current interest rate and they remain outstanding longer. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Large capitalization company risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> Large capitalization companies may fall out of favor with investors. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Small and medium capitalization company risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> The fund will be exposed to additional risks as a result of its investments in the securities of small and medium capitalization companies. Small and medium capitalization companies may fall out of favor with investors; may have limited product lines, operating histories, markets or financial resources; or may be dependent upon a limited management group. The prices of securities of small and medium capitalization companies generally are more volatile than those of large capitalization companies and are more likely to be adversely affected than large capitalization companies by changes in earnings results and investor expectations or poor economic or market conditions, including those experienced during a recession. Securities of small and medium capitalization companies may underperform large capitalization companies, may be harder to sell at times and at prices the portfolio managers believe appropriate and may offer greater potential for losses. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Liquidity risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Portfolio turnover risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> Active and frequent trading may increase a shareholder's tax liability and transaction costs, which could detract from the fund's&nbsp;performance. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Portfolio selection risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> The value of your investment may decrease if the portfolio managers' judgment about the attractiveness, value or market trends affecting a particular security, industry or sector or about market movements is incorrect. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Issuer risk.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> The value of a stock can go up or down more than the market as a whole and can perform differently from the value of the market as a whole, often due to disappointing earnings reports by the issuer, unsuccessful products or services, loss of major customers, major litigation against the issuer or changes in government regulations affecting the issuer or the competitive environment. The fund may experience a substantial or complete loss on an individual stock. Historically, the prices of securities of small and medium capitalization companies have generally gone up or down more than those of large capitalization companies, although even large capitalization companies may fall out of favor with investors. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> </font><font style="font-family: ARIAL;" class="_mt" color="#508541" size="2"><b>Risk of increase in expenses.</b></font><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"> Your actual costs of investing in the fund may be higher than the expenses shown in "Annual fund operating expenses" for a variety of reasons. For example, expense ratios may be higher than those shown if a fee limitation is changed or terminated or if average net assets decrease. Net assets are more likely to decrease and fund expense ratios are more likely to increase when markets are volatile. </font></p> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">These risks are discussed in more detail later in this Prospectus or in the SAI.</font></p></div> </div>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]25false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#508541" size="6"><a name="tx145172_5"> </a>Performance </font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart and Performance Table [Heading]26false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The accompanying bar chart and table provide some indication of the risks of investing in the fund.&nbsp;<font class="_mt">The bar chart shows changes in the fund's performance from year to year for Class B shares. The table shows the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund's performance with the average annual total returns of an index or other benchmark.</font> The fund makes updated performance information available at the fund's website,&nbsp;<font class="_mt">http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance</font> (select share class), or by calling the fund at <font class="_mt">1-877-721-1926</font>. </font></p> <div class="MetaData"> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" size="2"><i><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. </font></i></font></p></div> <div class="MetaData"> <p style="margin-top: 8px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown.</font></p></div></div> </div>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]27false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin-top: 8px; margin-bottom: 0px;"><font color="#508541" class="_mt"><font class="_mt" style="font-family: Arial;"><font size="2" class="_mt"><strong>Total returns </strong><font style="font-family: ARIAL;" color="#508541" size="1" class="_mt">(before taxes)</font><font style="font-family: ARIAL;" color="#508541" size="2" class="_mt"><strong> (%)</strong></font></font></font></font></p> <p style="margin-top: 8px; margin-bottom: 0px;">Calendar Years Ended December 31</p> <p style="margin-top: 8px; margin-bottom: 0px;"><strong><font color="#508541" size="2" class="_mt" style="font-family: Arial;"> </font></strong>&nbsp;</p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart [Heading]28false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://www.leggmason.com/role/ScheduleAnnualTotalReturnsLeggMasonClearbridgeEquityIncomeBuilderFundBarChart column period compact * column primary compact * row dei_LegalEntityAxis compact cik000880366_S000016665Member row rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>falsefalseBarChart1.jpg<div> &lt;div style="display:none;" &gt;~ http://www.leggmason.com/role/ScheduleAnnualTotalReturnsLeggMasonClearbridgeEquityIncomeBuilderFundBarChart column period compact * column primary compact * row dei_LegalEntityAxis compact cik000880366_S000016665Member row rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>falsehttp://www.leggmason.com/role/ScheduleAnnualTotalReturnsLeggMasonClearbridgeEquityIncomeBuilderFundBarChartfalsefalse001806 - Schedule - Annual Total Returns - {Legg Mason ClearBridge Equity Income Builder Fund (Bar Chart)}truefalsefalse1falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*5false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0414-0.0414falsefalsefalsetruefalseOtherxbrli: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 2001duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*6false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1369-0.1369falsefalsefalsetruefalseOtherxbrli: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 2002duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*7false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.35560.3556falsefalsefalsetruefalseOtherxbrli: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 2003duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*8false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09160.0916falsefalsefalsetruefalseOtherxbrli: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 2004duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*9false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06600.0660falsefalsefalsetruefalseOtherxbrli: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 2005duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$6falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*10false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.11030.1103falsefalsefalsetruefalseOtherxbrli: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 2006duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$7falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*11false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06160.0616falsefalsefalsetruefalseOtherxbrli: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 2007duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$8falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*12false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3596-0.3596falsefalsefalsetruefalseOtherxbrli: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 2008duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$9falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*13false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.23880.2388falsefalsefalsetruefalseOtherxbrli: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 2009duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$10falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*14false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12280.1228falsefalsefalsetruefalseOtherxbrli: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 2010duration2011-04-29T00:00:002011-04-29T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046578Memberrr_ProspectusShareClassAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass B0truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0414-0.0414falsefalsefalsetruefalse2truetruefalse-0.1369-0.1369falsefalsefalsetruefalse3truetruefalse0.35560.3556falsefalsefalsetruefalse4truetruefalse0.09160.0916falsefalsefalsetruefalse5truetruefalse0.06600.0660falsefalsefalsetruefalse6truetruefalse0.11030.1103falsefalsefalsetruefalse7truetruefalse0.06160.0616falsefalsefalsetruefalse8truetruefalse-0.3596-0.3596falsefalsefalsetruefalse9truetruefalse0.23880.2388falsefalsefalsetruefalse10truetruefalse0.12280.1228falsefalsefalsetruefalseOthernanafalsefalseLegg Mason ClearBridge Equity Income Builder Fund Class B101Annual Total Returns - UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*Rowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]29false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 0px; margin-bottom: 0px;">&nbsp;</p> <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td valign="top"> <p style="margin-top: 0px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="1"><font class="_mt"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="1">Best quarter</font></font><br />(<font class="_mt">06/30/2009</font>): <font class="_mt">14.36</font></font></p> <p style="margin-top: 0px; margin-bottom: 0px; font-size: 6px;">&nbsp;</p> <p style="margin-top: 0px; margin-bottom: 1px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="1"><font class="_mt"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="1">Worst quarter</font></font><br />(<font class="_mt">12/31/2008</font>): <font class="_mt">(21.22)</font></font></p></td></tr></table></div> </div>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]30false0rr_PerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData">&nbsp;<font class="_mt" style="font-family: Arial;"><font color="#508541" class="_mt"><strong><font size="2" class="_mt">Average annual total returns </font></strong><font style="font-family: ARIAL;" class="_mt" size="1">(for periods ended December&nbsp;31, 2010)</font><font style="font-family: ARIAL;" class="_mt" size="2"><b> (%) </b></font></font></font></div>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 Heading31false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://www.leggmason.com/role/ScheduleAverageAnnualTotalReturnsTransposedLeggMasonClearbridgeEquityIncomeBuilderFund row period compact * row primary compact * column dei_LegalEntityAxis compact cik000880366_S000016665Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;" &gt;~ 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available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.05770.0577falsefalsefalsetruefalse2truetruetrue0.07280.0728falsefalsefalsetruefalse3truetruetrue0.05800.0580falsefalsefalsetruefalse4truetruetrue0.04640.0464falsefalsefalsetruefalse5truetruetrue0.10310.1031falsefalsefalsetruefalse6truetruetrue0.12390.1239falsefalsefalsetruefalse7truetruetrue0.16230.1623falsefalsefalsetruefalseOtherxbrli: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 falsefalse1 yearduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*6false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.00280.0028falsefalsefalsetruefalse2truetruetrue0.00840.0084falsefalsefalsetruefalse3truetruetrue-0.0106-0.0106falsefalsefalsetruefalse4truetruetrue-0.0012-0.0012falsefalsefalsetruefalse5truetruetrue0.00690.0069falsefalsefalsetruefalse6truetruetrue0.01750.0175falsefalsefalsetruefalse7truetruetrue0.01450.0145falsefalsefalsetruefalseOtherxbrli: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 yearsduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*7false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.03090.0309falsefalsefalsetruefalse2truetruetrue0.03270.0327falsefalsefalsetruefalse3truetruetrue0.01490.0149falsefalsefalsetruefalse4truetruetrue0.01850.0185falsefalsefalsetruefalse5truetruetrue0.02910.0291falsefalsefalsetruefalse6truetruetrue0.04060.0406falsefalsefalsetruefalse7truetruetrue0.03630.0363falsefalsefalsetruefalseOtherxbrli: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 yearsduration2011-04-29T00:00:002011-04-29T00:00:00falseUSDfalsefalse$1falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046578Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass BBefore TaxesUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.07280.0728falsefalsefalsetruefalse2truetruetrue0.00840.0084falsefalsefalsetruefalse3truetruetrue0.03270.0327falsefalsefalsetruefalseOthernanafalsefalseClass B2falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046578Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseReturn after taxes on distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass BReturn after taxes on distributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05800.0580falsefalsefalsetruefalse2truetruetrue-0.0106-0.0106falsefalsefalsetruefalse3truetruetrue0.01490.0149falsefalsefalsetruefalseOthernanafalsefalseClass B Return after taxes on distributions3falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046578Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseReturn after taxes on distributions and sale of fund sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass BReturn after taxes on distributions and sale of fund sharesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04640.0464falsefalsefalsetruefalse2truetruetrue-0.0012-0.0012falsefalsefalsetruefalse3truetruetrue0.01850.0185falsefalsefalsetruefalseOthernanafalsefalseClass B Return after taxes on distributions and sale of fund shares4falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046577Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass ABefore TaxesUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05770.0577falsefalsefalsetruefalse2truetruetrue0.00280.0028falsefalsefalsetruefalse3truetruetrue0.03090.0309falsefalsefalsetruefalseOthernanafalsefalseClass A5falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046579Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass CBefore TaxesUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.10310.1031falsefalsefalsetruefalse2truetruetrue0.00690.0069falsefalsefalsetruefalse3truetruetrue0.02910.0291falsefalsefalsetruefalseOthernanafalsefalseClass C6falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_C000046580Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundClass IBefore TaxesUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.12390.1239falsefalsefalsetruefalse2truetruetrue0.01750.0175falsefalsefalsetruefalse3truetruetrue0.04060.0406falsefalsefalsetruefalseOthernanafalsefalseClass I7falseRowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseLegg Mason ClearBridge Equity Income Builder Funddei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_S000016665Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseRussell 3000 Value Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik000880366_Russell3000ValueIndexMemberrr_PerformanceMeasureAxisexplicitMemberLegg Mason ClearBridge Equity Income Builder FundShare ClassesRussell 3000 Value Index (reflects no deduction for fees, expenses or taxes)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.16230.1623falsefalsefalsetruefalse2truetruetrue0.01450.0145falsefalsefalsetruefalse3truetruetrue0.03630.0363falsefalsefalsetruefalseOthernanafalsefalseRussell 3000 Value Index (reflects no deduction for fees, expenses or taxes)37Average Annual Total Returns - Legg Mason ClearBridge Equity Income Builder FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*Rowdei_LegalEntityAxisAxiscik000880366_S000016665MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]32false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">Prior to December&nbsp;7, 2009, the fund followed different investment strategies under the name "Legg Mason ClearBridge Capital and Income Fund." </font></p> <p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2"><font class="_mt"><font style="font-family: ARIAL;" class="_mt" color="#666666" size="2">The after-tax returns are shown only for Class B shares, are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.&nbsp;</font></font><font class="_mt">Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and the 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.</font> <font class="_mt">After-tax returns for classes other than Class B will vary from returns shown for Class B.</font></font></p></div> </div>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 Narrative130Risk/Return Summary - (Legg Mason ClearBridge Equity Income Builder Fund) (Legg Mason ClearBridge Equity Income Builder Fund)UnKnownUnKnownUnKnownUnKnownfalsetrue