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BrandywineGLOBAL - Global Unconstrained Bond Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading BRANDYWINEGLOBAL — GLOBAL UNCONSTRAINED BOND FUND
Objective [Heading] rr_ObjectiveHeading Investment objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
Positive returns that are independent of market cycles.
Expense [Heading] rr_ExpenseHeading Fees and expenses of the fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The accompanying table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in certain funds distributed through Franklin Distributors, LLC (“Franklin Distributors” or the “Distributor”), the fund’s distributor. More information about these and other discounts is available from your Service Agent, in the fund’s Prospectus on page 32 under the heading “Additional information about each share class,” in the appendix titled “Appendix: Waivers and Discounts Available from Certain Service Agents” on page A-1 of the fund’s Prospectus and in the fund’s Statement of Additional Information (“SAI”) on page 82 under the heading “Sales Charge Waivers and Reductions for Class A Shares.” “Service Agents” include banks, brokers, dealers, insurance companies, investment advisers, financial consultants or advisers, mutual fund supermarkets and other financial intermediaries that have entered into an agreement with the Distributor to sell shares of the fund.
If you purchase Class I shares or Class IS shares through a Service Agent acting solely as an agent on behalf of its customers, that Service Agent may charge you a commission. Such commissions, if any, are not charged by the fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder fees(fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses (%)(expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2026
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover.
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 138% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 138.00%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock You may buy Class A shares in amounts of $500,000 or more at net asset value (without an initial sales charge), but if you redeem those shares within 18 months of their purchase, you will pay a contingent deferred sales charge of 0.50%.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in certain funds distributed through Franklin Distributors, LLC (“Franklin Distributors” or the “Distributor”), the fund’s distributor.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
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:
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You invest $10,000 in the fund for the time periods indicated
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Your investment has a 5% return each year and the fund’s operating expenses remain the same (except that any applicable fee waiver or expense reimbursement is reflected only through its expiration date)
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You reinvest all distributions and dividends without a sales charge
Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Number of years you own your shares ($)
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Number of years you own your shares ($)
Strategy [Heading] rr_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund seeks to meet its investment objective through strategic investments in domestic and foreign fixed income securities, currencies and derivatives. The fund will initiate long and short exposures by investing across bond sectors, including sovereign debt and corporate bonds; currencies; and derivative instruments. Short exposure will be established primarily through the use of derivatives, including currency forwards, interest rate swaps and futures. The fund is “unconstrained” in that the portfolio managers do not attempt to keep the portfolio structure or the fund’s performance consistent with any designated stock, bond or market index.
The fund normally invests at least 80% of its net assets, plus the amount of borrowings for investment purposes, if any, in fixed income securities or other instruments with similar economic characteristics. Fixed income securities in which the fund may invest are debt securities issued or guaranteed by national governments, their agencies or instrumentalities and political sub-divisions (including inflation index linked securities and municipal bonds); debt securities of supranational organizations such as bonds, debentures and freely transferable promissory notes; corporate debt securities, including debentures, bonds (including zero coupon bonds), convertible and non-convertible notes, commercial paper, certificates of deposits, freely transferable promissory notes and bankers acceptances issued by industrial, utility, finance, commercial banking or bank holding company organizations; mortgage-backed securities (including collateralized debt obligations); asset-backed securities; emerging markets debt; and high yield debt (often called “junk bonds”).
While the fund may invest in securities of any rating level, or unrated securities, the portfolio managers intend to maintain an average weighted portfolio quality of A- or better, whether composed of rated securities or unrated securities deemed by the subadviser to be of comparable quality. The fund will invest in both investment grade and below investment grade securities and currencies of developed and emerging countries. Fixed income securities rated below investment grade are commonly known as “junk” bonds. Investment grade securities are securities rated at the time of
purchase by at least one nationally recognized statistical ratings organization (“NRSRO”) within one of the top four categories (without regard to +/- designations), or, if unrated, judged by the subadviser to be of comparable credit quality.
The fund typically has significant exposure to foreign currencies and foreign countries. As a global fund, under normal market conditions, the fund will invest in or have exposure to at least three countries, which may include the United States. The fund considers an investment to be tied economically to a country if the issuer: (i) has a class of securities whose principal securities market is in the country; (ii) is organized under the laws of, or has a principal office in, the country, (iii) derives 50% or more of its total revenue or profit from goods produced, sales made or services provided in the country, or (iv) maintains 50% or more of its assets in the country. The fund may invest a significant portion of its assets in a particular geographic region or country, including emerging market countries. Normally, the fund will not invest more than 20% of the fund’s assets in securities or issuers in any one foreign country, other than the United States, Canada, the United Kingdom, Japan, Australia and member countries of the European Union, or denominated in any one currency, other than the U.S. dollar, the Canadian dollar, the pound, the euro, the Australian dollar or the yen.
The fund may invest in securities of any maturity. The weighted average effective duration of the fund’s portfolio, including derivatives, is expected to range from -5 to +8 years. The fund may have a negative weighted average effective duration due to holding certain instruments that have negative effective duration, such as through the use of derivative instruments.
The fund achieves certain investment exposures, including short positions, primarily through derivative transactions, including foreign currency forwards, bond futures, interest rate futures, swaps (including interest rate, total return and inflation swaps), credit default swaps, credit default swap index products, instruments involved in currency risk management strategies, including cross hedges, options and options on futures and warrants. The fund may use derivatives in an effort to enhance total return, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to change the effective duration of its portfolio, to manage certain investment risks and/or as a substitute for the purchase or sale of securities or currencies. These instruments are taken into account when determining compliance with the fund’s 80% policy. The fund’s use of derivatives may be extensive. However, the notional principal of the fund’s aggregate net short currency exposure will not be greater than 70% of the fund’s total assets. For example, if the fund holds 5% of its assets in euro-denominated securities, and the fund sells euros and buys U.S. dollars through a currency forward contract for 10% of its assets, the fund will have a net short euro position of 5% of the fund’s total assets.
The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund.
Risk [Heading] rr_RiskHeading Principal risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The accompanying bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Class A 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 a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value, available at www.franklintempleton.com/prospectus (select fund and share class), or by calling the fund at
877-6LM-FUND/656-3863.
The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart shows changes in the fund’s performance from year to year for Class A 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 a broad measure of market performance and an additional index with characteristics relevant to the fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 877-6LM-FUND/656-3863
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.franklintempleton.com/prospectus (select fund and share class)
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Total returns (%) Before taxes
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Calendar Years ended December 31 Best Quarter (12/31/2023): 8.75 Worst Quarter (03/31/2020): (8.21)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns (%)(for periods ended December 31, 2024)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns are shown only for Class A shares, are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred 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-advantaged arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns are shown only for Class A shares, are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on 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-advantaged arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for classes other than Class A will vary from returns shown for Class A. Returns after taxes on distributions and sale of fund shares are higher than returns before taxes for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of fund shares.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher Returns after taxes on distributions and sale of fund shares are higher than returns before taxes for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of fund shares.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns are shown only for Class A shares, are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on 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-advantaged arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for classes other than Class A will vary from returns shown for Class A. Returns after taxes on distributions and sale of fund shares are higher than returns before taxes for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of fund shares.
Important data provider notices and terms are available at www.franklintempletondatasources.com. All data is subject to change.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Risk Nondiversified Status [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Non-diversification risk. The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund. To the extent the fund invests its assets in a smaller number of issuers, the fund will be more susceptible to negative events affecting those issuers than a diversified fund.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Risk Not Insured Depository Institution [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or by any bank or government agency.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Foreign investments and emerging markets risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Foreign investments and emerging markets risk. The fund’s investments in securities of foreign issuers or issuers with significant exposure to foreign markets involve additional risk as compared to investments in U.S. securities or issuers with predominantly U.S. exposure, such as less liquid, less transparent, less regulated and more volatile markets. The value of the fund’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable or unsuccessful government actions, reduction of government or central bank support, inadequate accounting standards and auditing and financial recordkeeping requirements, lack of information, political, economic, financial or social instability, terrorism, armed conflicts and other geopolitical events, and the impact of tariffs and other restrictions on trade or economic sanctions. Geopolitical or other events such as nationalization or expropriation could even cause the loss of the fund’s entire investment in one or more countries.
In addition, there may be significant obstacles to obtaining information necessary for investigations into or litigation against issuers located in or operating in certain foreign markets, particularly emerging market countries, and shareholders may have limited legal remedies. To the extent the fund focuses its investments in a single country or only a few countries in a particular geographic region, economic, political, regulatory or other conditions affecting such country or region may have a greater impact on fund performance relative to a more geographically diversified fund.
The value of investments in securities denominated in foreign currencies increases or decreases as the rates of exchange between those currencies and the U.S. dollar change. Currency conversion costs and currency fluctuations could erase investment gains or add to investment losses. Currency exchange rates can be volatile, and are affected by factors such as general economic and political conditions, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls and speculation. The fund may be unable or may choose not to hedge its foreign currency exposure.
Less developed markets are more likely to experience problems with the clearing and settling of trades and the holding of securities by local banks, agents and depositories. Settlement of trades in these markets can take longer than in other markets and the fund may not receive its proceeds from the sale of certain securities for an extended period (possibly several weeks or even longer).
The risks of foreign investments are heightened when investing in issuers in emerging market countries. Emerging market countries tend to have economic, political and legal systems that are less developed and are less stable than those of more developed countries. Their economies tend to be less diversified than those of more developed countries. They typically have fewer medical and economic resources than more developed countries, and thus they may be less able to control or mitigate the effects of a pandemic or a natural disaster. They are often particularly sensitive to market movements because their market prices tend to reflect speculative expectations. Low trading volumes may result in a lack of liquidity and in extreme price volatility.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Market events risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Market events risk. The market values of securities or other assets will fluctuate, sometimes sharply and unpredictably, due to factors such as economic events, governmental actions or intervention, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by trade disputes, labor strikes or other factors, political developments, armed conflicts, economic sanctions and countermeasures in response to sanctions, major cybersecurity events, the global and domestic effects of widespread or local health, weather or climate events, and other factors that may or may not be related to the issuer of the security or other asset. Economies and financial markets throughout the world are increasingly interconnected. Economic, financial or political events, trading and tariff arrangements, public health events, terrorism, wars, natural disasters and other circumstances in one country or region could have profound impacts on global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries or markets directly affected, the value and liquidity of the fund’s investments may be negatively affected. Ongoing armed conflicts between Russia and Ukraine in Europe and among Israel, Hamas and other militant groups in the Middle East have caused and could continue to cause significant market disruptions and volatility. The hostilities and sanctions resulting from those hostilities have and could continue to have a significant impact on certain fund investments as well as fund performance and liquidity. Following Russia’s invasion of Ukraine in 2022, Russian stocks lost all, or nearly all, of their market value. Other securities or markets could be similarly affected by past or future geopolitical or other events or conditions. Furthermore, events involving limited liquidity, defaults, non-performance or other adverse developments that affect one industry, such as the financial services industry, or concerns or rumors about any events of these kinds, have in the past and may in the future lead to market-wide liquidity problems, may spread to other industries, and could negatively affect the value and liquidity of the fund’s investments.
Raising the ceiling on U.S. government debt has become increasingly politicized. Any failure to increase the total amount that the U.S. government is authorized to borrow could lead to a default on U.S. government obligations, with unpredictable consequences for economies and markets in the U.S. and elsewhere. Recently, inflation and interest rates have been volatile and may increase in the future. These circumstances could adversely affect the value and liquidity of the fund’s investments, impair the fund’s ability to satisfy redemption requests, and negatively impact the fund’s performance.
The United States and other countries are periodically involved in disputes over trade and other matters, which may result in tariffs, investment restrictions and adverse impacts on affected companies and securities. For example, the United States has imposed tariffs and other trade barriers on Chinese exports, has restricted sales of certain categories of goods to China, and has established barriers to investments in China. Trade disputes may adversely affect the economies of the United States and its trading partners, as well as companies directly or indirectly affected and financial markets generally. The United States government has prohibited U.S. persons from investing in Chinese companies designated as related to the Chinese military. These and possible future restrictions could limit the fund’s opportunities for investment and require the sale of securities at a loss or make them illiquid. Moreover, the Chinese government is involved in a longstanding dispute with Taiwan that has included threats of invasion. If the political climate between the United States and China does not improve or continues to deteriorate, if China were to attempt unification of Taiwan by force, or if other geopolitical conflicts develop or get worse, economies, markets and individual securities may be severely affected both regionally and globally, and the value of the fund’s assets may go down.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Issuer risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Issuer risk. The market price of a security held by the fund 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 due to factors specifically relating to the security’s issuer, such as disappointing earnings reports by the issuer, unsuccessful products or services, loss of major customers, changes in management, corporate actions, negative perception in the marketplace, or major litigation or changes in government regulations affecting the issuer or the competitive environment. An individual security may also be affected by factors relating to the industry or sector of the issuer or the securities markets as a whole, and conversely an industry or sector or the securities markets may be affected by a change in financial condition or other event affecting a single issuer. The fund may experience a substantial or complete loss on an individual security.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Portfolio management risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Portfolio management risk. The value of your investment may decrease if the subadviser’s judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates or other market factors, is incorrect or does not produce the desired results, or if there are imperfections, errors or limitations in the models, tools and data used by the subadviser. In addition, the fund’s investment strategies or policies may change from time to time. Those changes may not lead to the results intended by the subadviser and could have an adverse effect on the value or performance of the fund.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Valuation risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Valuation risk. The sales price the fund could receive for any particular portfolio investment may differ from the fund’s valuation of the investment, particularly for securities that trade in thin or volatile markets or that are valued using a fair value methodology. These differences may increase significantly and affect fund investments more broadly during periods of market volatility. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the fund had not fair-valued securities or had used a different valuation methodology. The fund’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third party service providers. The valuation of the fund’s investments involves subjective judgment, which may prove to be incorrect.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Industry or sector focus risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Industry or sector focus risk. The fund may be susceptible to an increased risk of loss, including losses due to events that adversely affect the fund’s investments more than the market as a whole, to the extent that the fund may, from time to time, have greater exposure to the securities of a particular issuer or issuers within the same industry or sector.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Illiquidity risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Illiquidity risk. Some assets held by the fund may be or become impossible or difficult to sell and some assets that the fund wants to invest in may be impossible or difficult to purchase, particularly during times of market turmoil or due to adverse changes in the conditions of a particular issuer. These illiquid assets may also be volatile and difficult to value. Markets may become illiquid quickly. Markets may become illiquid when, for instance, there are few, if any, interested buyers or sellers or when dealers are unwilling or unable to make a market for certain securities. As a general matter, dealers have been less willing to make markets in recent years. Federal banking regulations may also cause certain dealers to reduce their inventories of certain securities, which may further decrease the fund’s ability to buy or sell such securities. During times of market turmoil, there have been, and may be, no buyers or sellers for securities in entire asset classes. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, or to try to limit losses, the fund may be forced to sell at a substantial loss or may not be able to sell at all. The fund may not receive its proceeds from the sale of certain securities for an extended period (for example, several weeks or even longer).
BrandywineGLOBAL - Global Unconstrained Bond Fund | Cybersecurity risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Cybersecurity risk. Like other funds and business enterprises, the fund, the manager, the subadviser and their service providers are subject to the risk of cyber incidents occurring from time to time. Cybersecurity incidents, whether intentionally caused by third parties or otherwise, may allow an unauthorized party to gain access to fund assets, fund or customer data (including private shareholder information) or proprietary information, cause the fund, the manager, the subadviser and/or their service providers (including, but not limited to, fund accountants, custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality, or prevent fund investors from purchasing, redeeming or exchanging shares, receiving distributions or receiving timely information regarding the fund or their investment in the fund. The fund, the manager, and the subadviser have limited ability to prevent or mitigate cybersecurity incidents affecting third party service providers, and such third party service providers may have limited indemnification obligations to the fund, the manager, and/or the subadviser. Cybersecurity incidents may result in financial losses to the fund and its shareholders, and substantial costs may be incurred in order to prevent or mitigate any future cybersecurity incidents. Issuers of securities in which the fund invests are also subject to cybersecurity risks, and the value of these securities could decline if the issuers experience cybersecurity incidents.
New ways to carry out cyber attacks continue to develop. There is a chance that some risks have not been identified or prepared for, or that an attack may not be detected, which puts limitations on the fund’s ability to plan for or respond to a cyber attack.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Market and interest rate risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Market and interest rate risk. The market prices of securities held by the fund may go up or down, sometimes rapidly or unpredictably. If the market prices of the fund’s securities fall, the value of your investment in the fund will decline. The market price of a security may fall due to general market conditions, such as real or perceived adverse economic or political conditions or trends, tariffs and trade disruptions, inflation, substantial economic downturn or recession, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. Changes in market conditions will not typically have the same impact on all types of securities.
The value of your investment will generally go down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term or duration securities. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the fund. Recently, there have been inflationary price movements. As a result, fixed income securities markets may experience heightened levels of interest rate volatility and liquidity risk. The U.S. government and the U.S. Federal Reserve, as well as certain foreign governments and central banks, have from time to time taken steps to support financial markets. The U.S. government and the U.S. Federal Reserve may, conversely, reduce market support activities, including by taking action intended to increase certain interest rates. This and other government intervention may not work as intended, particularly if the efforts are perceived by investors as being unlikely to achieve the desired results. Changes in government activities in this regard, such as changes in interest rate policy, can negatively affect financial markets generally, increase market volatility and reduce the value and liquidity of securities in which the fund invests.
The maturity of a security may be significantly longer than its duration. A security’s maturity and other features may be more relevant than its duration in determining the security’s sensitivity to other factors affecting the issuer or markets generally such as changes in credit quality or in the yield premium that the market may establish for certain types of securities.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Unconstrained strategy risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Unconstrained strategy risk. The fund uses a variety of investment strategies to try to preserve capital while maximizing returns. The portfolio managers do not attempt to keep the portfolio structure or the fund’s performance consistent with any designated stock, bond or market index, and, during times of market rallies, the fund may not perform as well as other funds that seek to outperform an index. Over time, the investment performance of these strategies is designed to be independent of longer term movements in the stock and bond markets. Interest rate levels and currency valuations will not always respond as the portfolio managers expect and portfolio securities may remain over- or under-valued.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Credit risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Credit risk. If an issuer or guarantor of a security held by the fund or a counterparty to a financial contract with the fund defaults or its credit 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. Changes in actual or perceived creditworthiness may occur quickly. The fund could be delayed or hindered in its enforcement of rights against an issuer, guarantor or counterparty. Subordinated securities (meaning securities that rank below other securities with respect to claims on the issuer’s assets) are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.
BrandywineGLOBAL - Global Unconstrained Bond Fund | High yield junk bonds risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
High yield (“junk”) bonds risk. High yield bonds are generally subject to greater credit risks than higher-grade bonds, including the risk of default on the payment of interest or principal. High yield bonds are considered speculative, typically have lower liquidity and are more difficult to value than higher grade bonds. High yield bonds tend to be volatile and more susceptible to adverse events, credit downgrades and negative sentiments and may be difficult to sell at a desired price, or at all, during periods of uncertainty or market turmoil.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Prepayment or call risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Prepayment or call risk. Many issuers have a right to prepay their fixed income securities. Issuers may be more likely to prepay their securities if interest rates fall. If this happens, the fund may not benefit from the rise in the market price of the securities that normally accompanies a decline in interest rates, and will be forced to reinvest prepayment proceeds at a time when yields on securities available in the market are lower than the yield on prepaid securities. The fund may also lose any premium it paid to purchase the securities.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Sovereign debt risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Sovereign debt risk. Sovereign government and supranational debt involve many of the risks of foreign and emerging markets investments as well as the risk of debt moratorium, repudiation or renegotiation, and the fund may be unable to enforce its rights against the issuers. Sovereign debt risk is increased for emerging market issuers.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Model risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Model risk. The subadviser’s investment models may not adequately take into account certain factors and may result in the fund having a lower return than if the fund were managed using another model or investment strategy. When a model or data used in managing the fund contains an error, or is incorrect or incomplete, any investment decision made in reliance on the model or data may not produce the desired results and the fund may suffer losses.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Long short strategy risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Long/short strategy risk. While the fund may invest in long positions and short positions, there is the risk that the investments will not perform as expected. The fund’s long/short strategy may result in greater losses than if the fund held only long positions, as losses on one type of position could more than offset gains on the other or the fund could lose money on both positions. The fund’s short positions could result in unlimited losses if the fund does not own the asset sold short and it is unable to close out of the short sale or short position.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Mortgage backed and asset backed securities risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Mortgage-backed and asset-backed securities risk. When market interest rates increase, the market values of mortgage-backed securities decline. At the same time, mortgage refinancings and prepayments slow, which lengthens the effective duration of these securities. As a result, the negative effect of the interest rate increase on the market value of mortgage-backed securities is usually more pronounced than it is for other types of fixed income securities, potentially increasing the volatility of the fund. Conversely, when market interest rates decline, while the value of mortgage-backed securities may increase, the rate of prepayment of the underlying mortgages also tends to increase, which shortens the effective duration of these securities. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations and the value of property that secures the mortgage may decline in value and be insufficient, upon foreclosure, to repay the associated loan. Investments in asset-backed securities are subject to similar risks. The ability of an issuer of asset-backed securities to enforce its security interest in the underlying assets may be limited, and therefore certain asset-backed securities present a heightened level of risk.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Risks relating to inflation indexed securities [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Extension risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Extension risk. When interest rates rise, repayments of fixed income securities may occur more slowly than anticipated, extending the effective duration of these fixed income securities at below market interest rates and causing their market prices to decline more than they would have declined due to the rise in interest rates alone. This may cause the fund’s share price to be more volatile.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Derivatives risks [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains, such as when market prices, interest rates, currencies, or the derivatives themselves behave in a way not anticipated by the fund’s subadviser. Using derivatives also can have a leveraging effect and increase fund volatility. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. Derivatives may not be available at the time or price desired, may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Derivatives are generally subject to the risks applicable to the assets, rates, indices or other indicators underlying the
derivative. The value of a derivative may fluctuate more than the underlying assets, rates, indices or other indicators to which it relates. Use of derivatives may have different tax consequences for the fund than an investment in the underlying asset, and those differences may affect the amount, timing and character of income distributed to shareholders. The U.S. government and non-U.S. governments have adopted and implemented regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin and reporting requirements. The ultimate impact of the regulations remains unclear. Additional regulation of derivatives may make derivatives more costly, limit their availability or utility, otherwise adversely affect their performance or disrupt markets.
Credit default swap contracts involve heightened risks and may result in losses to the fund. Credit default swaps may be illiquid and difficult to value. When the fund sells credit protection via a credit default swap, credit risk increases since the fund has exposure to both the issuer whose credit is the subject of the swap and the counterparty to the swap.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Currency derivatives risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Currency derivatives risk. Currency futures, forwards or options may not always work as intended, and in specific cases the fund may be worse off than if it had not used such instrument(s). There may not always be suitable hedging instruments available. Even where suitable hedging instruments are available, the portfolio managers may determine not to hedge the fund’s currency risks.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Leverage risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Leverage risk. The value of your investment may be more volatile if the fund borrows or uses instruments, such as derivatives, that have a leveraging effect on the fund’s portfolio. Other risks described in the Prospectus also will be compounded because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the fund would otherwise have had. The fund may also have to sell assets at inopportune times to satisfy its obligations created by the use of leverage or derivatives. The use of leverage is considered to be a speculative investment practice and may result in the loss of a substantial amount, and possibly all, of the fund’s assets. In addition, the fund’s portfolio will be leveraged if it exercises its right to delay payment on a redemption, and losses will result if the value of the fund’s assets declines between the time a redemption request is deemed to be received by the fund and the time the fund liquidates assets to meet redemption requests.
The subadviser expects that the implementation of the fund’s investment strategy, which may include a significant level of investment in derivatives, will have the effect of creating leverage in the fund in that the fund’s potential exposure may be greater than its net assets.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Short positions risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Short positions risk. Short positions involve leverage and there is no limit on the potential amount of loss on a security that is sold short. The fund may suffer significant losses if assets that the fund sells short appreciate rather than depreciate in value. The amount of any gain will be decreased, and the amount of any loss increased, by the amount of the premium, dividends, interest, or expenses the fund may be required to pay in connection with the short sale.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Redemption risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
Redemption risk. The fund may experience heavy redemptions that could cause the fund to liquidate its assets at inopportune times or unfavorable prices or increase or accelerate taxable gains or transaction costs and may negatively affect the fund’s net asset value, performance, or ability to satisfy redemptions in a timely manner, which could cause the value of your investment to decline.
BrandywineGLOBAL - Global Unconstrained Bond Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.25% [1],[2]
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none [3],[4]
Small account fee ($) rr_MaximumAccountFee $ 15 [5]
Management fees rr_ManagementFeesOverAssets 0.65%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.29%
Total annual fund operating expenses rr_ExpensesOverAssets 1.19%
Fees waived and/or expenses reimbursed rr_FeeWaiverOrReimbursementOverAssets [6]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses rr_NetExpensesOverAssets 1.19%
1 year rr_ExpenseExampleYear01 $ 344
3 years rr_ExpenseExampleYear03 595
5 years rr_ExpenseExampleYear05 866
10 years rr_ExpenseExampleYear10 1,637
1 year rr_ExpenseExampleNoRedemptionYear01 344
3 years rr_ExpenseExampleNoRedemptionYear03 595
5 years rr_ExpenseExampleNoRedemptionYear05 866
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,637
2015 rr_AnnualReturn2015 (5.65%)
2016 rr_AnnualReturn2016 4.11%
2017 rr_AnnualReturn2017 6.77%
2018 rr_AnnualReturn2018 (3.50%)
2019 rr_AnnualReturn2019 5.14%
2020 rr_AnnualReturn2020 6.55%
2021 rr_AnnualReturn2021 (1.22%)
2022 rr_AnnualReturn2022 (5.00%)
2023 rr_AnnualReturn2023 3.45%
2024 rr_AnnualReturn2024 (2.11%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2023
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.75%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (8.21%)
1 year rr_AverageAnnualReturnYear01 (4.27%)
5 years rr_AverageAnnualReturnYear05 (0.20%)
10 years rr_AverageAnnualReturnYear10 0.52%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) rr_MaximumDeferredSalesChargeOverOther 1.00% [3]
Small account fee ($) rr_MaximumAccountFee $ 15 [5]
Management fees rr_ManagementFeesOverAssets 0.65%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.28%
Total annual fund operating expenses rr_ExpensesOverAssets 1.93%
Fees waived and/or expenses reimbursed rr_FeeWaiverOrReimbursementOverAssets [6]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses rr_NetExpensesOverAssets 1.93%
1 year rr_ExpenseExampleYear01 $ 296
3 years rr_ExpenseExampleYear03 606
5 years rr_ExpenseExampleYear05 1,042
10 years rr_ExpenseExampleYear10 2,061
1 year rr_ExpenseExampleNoRedemptionYear01 196
3 years rr_ExpenseExampleNoRedemptionYear03 606
5 years rr_ExpenseExampleNoRedemptionYear05 1,042
10 years rr_ExpenseExampleNoRedemptionYear10 $ 2,061
1 year rr_AverageAnnualReturnYear01 (3.74%)
5 years rr_AverageAnnualReturnYear05 (0.42%)
10 years rr_AverageAnnualReturnYear10 0.10%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Class FI  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none [3]
Small account fee ($) rr_MaximumAccountFee none [5]
Management fees rr_ManagementFeesOverAssets 0.65%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.25%
Total annual fund operating expenses rr_ExpensesOverAssets 1.15%
Fees waived and/or expenses reimbursed rr_FeeWaiverOrReimbursementOverAssets [6]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses rr_NetExpensesOverAssets 1.15%
1 year rr_ExpenseExampleYear01 $ 117
3 years rr_ExpenseExampleYear03 365
5 years rr_ExpenseExampleYear05 632
10 years rr_ExpenseExampleYear10 1,398
1 year rr_ExpenseExampleNoRedemptionYear01 117
3 years rr_ExpenseExampleNoRedemptionYear03 365
5 years rr_ExpenseExampleNoRedemptionYear05 632
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,398
1 year rr_AverageAnnualReturnYear01 (2.03%)
5 years rr_AverageAnnualReturnYear05 0.27%
10 years rr_AverageAnnualReturnYear10 0.81%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Class R  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none [3]
Small account fee ($) rr_MaximumAccountFee none [5]
Management fees rr_ManagementFeesOverAssets 0.65%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.34%
Total annual fund operating expenses rr_ExpensesOverAssets 1.49%
Fees waived and/or expenses reimbursed rr_FeeWaiverOrReimbursementOverAssets (0.04%) [6]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses rr_NetExpensesOverAssets 1.45%
1 year rr_ExpenseExampleYear01 $ 148
3 years rr_ExpenseExampleYear03 468
5 years rr_ExpenseExampleYear05 810
10 years rr_ExpenseExampleYear10 1,777
1 year rr_ExpenseExampleNoRedemptionYear01 148
3 years rr_ExpenseExampleNoRedemptionYear03 468
5 years rr_ExpenseExampleNoRedemptionYear05 810
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,777
1 year rr_AverageAnnualReturnYear01 (2.39%)
5 years rr_AverageAnnualReturnYear05 (0.02%)
10 years rr_AverageAnnualReturnYear10 0.48%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none [3]
Small account fee ($) rr_MaximumAccountFee none [5]
Management fees rr_ManagementFeesOverAssets 0.65%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.28%
Total annual fund operating expenses rr_ExpensesOverAssets 0.93%
Fees waived and/or expenses reimbursed rr_FeeWaiverOrReimbursementOverAssets (0.08%) [6]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses rr_NetExpensesOverAssets 0.85%
1 year rr_ExpenseExampleYear01 $ 87
3 years rr_ExpenseExampleYear03 289
5 years rr_ExpenseExampleYear05 507
10 years rr_ExpenseExampleYear10 1,137
1 year rr_ExpenseExampleNoRedemptionYear01 87
3 years rr_ExpenseExampleNoRedemptionYear03 289
5 years rr_ExpenseExampleNoRedemptionYear05 507
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,137
1 year rr_AverageAnnualReturnYear01 (1.86%)
5 years rr_AverageAnnualReturnYear05 0.53%
10 years rr_AverageAnnualReturnYear10 1.07%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Class IS  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none [3]
Small account fee ($) rr_MaximumAccountFee none [5]
Management fees rr_ManagementFeesOverAssets 0.65%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 0.84%
Fees waived and/or expenses reimbursed rr_FeeWaiverOrReimbursementOverAssets (0.09%) [6]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses rr_NetExpensesOverAssets 0.75%
1 year rr_ExpenseExampleYear01 $ 77
3 years rr_ExpenseExampleYear03 259
5 years rr_ExpenseExampleYear05 457
10 years rr_ExpenseExampleYear10 1,029
1 year rr_ExpenseExampleNoRedemptionYear01 77
3 years rr_ExpenseExampleNoRedemptionYear03 259
5 years rr_ExpenseExampleNoRedemptionYear05 457
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,029
1 year rr_AverageAnnualReturnYear01 (1.73%)
5 years rr_AverageAnnualReturnYear05 0.64%
10 years rr_AverageAnnualReturnYear10 1.17%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Return after taxes on distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (6.62%)
5 years rr_AverageAnnualReturnYear05 (1.22%)
10 years rr_AverageAnnualReturnYear10 (0.41%)
BrandywineGLOBAL - Global Unconstrained Bond Fund | Return after taxes on distributions and sale of fund shares | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (2.51%)
5 years rr_AverageAnnualReturnYear05 (0.56%)
10 years rr_AverageAnnualReturnYear10 0.02%
BrandywineGLOBAL - Global Unconstrained Bond Fund | Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (1.69%)
5 years rr_AverageAnnualReturnYear05 (1.96%)
10 years rr_AverageAnnualReturnYear10 0.15%
BrandywineGLOBAL - Global Unconstrained Bond Fund | FTSE 3-Month U.S. Treasury Bill Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 5.45%
5 years rr_AverageAnnualReturnYear05 2.54%
10 years rr_AverageAnnualReturnYear10 1.79%
[1]
Shareholders purchasing Class A shares through certain Service Agents or in certain types of accounts may be eligible for a waiver of the sales charge. For additional information, see “Additional information about each share class — Sales charges” in the Prospectus.
[2]
The sales charge is waived for shareholders purchasing Class A shares through accounts where Franklin Distributors is the broker-dealer of record (“Distributor Accounts”).
[3]
Maximum deferred sales charge (load) may be reduced over time.
[4]
You may buy Class A shares in amounts of $500,000 or more at net asset value (without an initial sales charge), but if you redeem those shares within 18 months of their purchase, you will pay a contingent deferred sales charge of 0.50%.
[5]
If the value of your account is below $1,000 ($250 for retirement plans that are not employer-sponsored), the fund may charge you a fee of $3.75 per account that is determined and assessed quarterly by the fund or your Service Agent (with an annual maximum of $15.00 per account). Please contact your Service Agent or the fund for more information.
[6]
The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions, dividend expense on short sales, taxes, extraordinary expenses and acquired fund fees and expenses) so that the ratio of total annual fund operating expenses will not exceed 1.20% for Class A shares, 1.95% for Class C shares, 1.20% for Class FI shares, 1.45% for Class R shares, 0.85% for Class I shares and 0.75% for Class IS shares, subject to recapture as described below. In addition, the ratio of total annual fund operating expenses for Class IS shares will not exceed the ratio of total annual fund operating expenses for Class I shares, subject to recapture as described below. These arrangements cannot be terminated prior to December 31, 2026 without the Board of Trustees’ consent. The manager is permitted to recapture amounts waived and/or reimbursed to a class within three years after the fiscal year in which the manager earned the fee or incurred the expense if the class’ total annual fund operating expenses have fallen to a level below the limits described above. In no case will the manager recapture any amount that would result, on any particular business day of the fund, in the class’ total annual fund operating expenses exceeding the applicable limits described above or any other lower limit then in effect. In addition, the manager has agreed to waive the fund’s management fee to an extent sufficient to offset the net management fee payable in connection with any investment in an affiliated money market fund. This management fee waiver is not subject to the recapture provision discussed above.