485BPOS

As filed with the Securities and Exchange Commission on April 16, 2014

1933 Act Registration No. 333-162441

1940 Act Registration No. 811-22338

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	¨
Post-Effective Amendment No. 78	x
and
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 79	x

LEGG MASON GLOBAL ASSET MANAGEMENT TRUST

(Exact Name of Registrant as Specified in Charter)

100 International Drive

Baltimore, Maryland 21202

(Address of principal executive offices)

Registrant’s telephone number, including area code: (410) 539-0000

Name and address of agent for service:	Copy to:
RICHARD M. WACHTERMAN, ESQ. Legg Mason & Co., LLC 100 International Drive Baltimore, Maryland 21202	ARTHUR C. DELIBERT, ESQ. K&L Gates LLP 1601 K Street, N.W. Washington, D.C. 20006-1600

Approximate Date of Proposed Public Offering: Continuous

It is proposed that this filing will become effective:

x immediately upon filing pursuant to Rule 485(b)

¨ on                     , pursuant to Rule 485(b)

¨ 60 days after filing pursuant to Rule 485(a)(1)

¨ on                     , pursuant to Rule 485(a)(1)

¨ 75 days after filing pursuant to Rule 485(a)(2)

¨ on                     , pursuant to Rule 485(a)(2)

If appropriate, check the following box:

¨ This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

This amendment is being filed solely to submit in interactive data format exhibits containing risk/return summary information that is identical to the risk/return summary information contained in the Registrant’s prospectus for Legg Mason Strategic Real Return Fund, which was filed with the Securities and Exchange Commission in Post-Effective Amendment No. 77 to the Registrant’s registration statement on March 24, 2014.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the “Securities Act”) and the Investment Company Act of 1940, as amended, the Registrant, Legg Mason Global Asset Management Trust, hereby certifies that it meets all of the requirements for effectiveness of this Post-Effective Amendment No. 78 under Rule 485(b) under the Securities Act of 1933 and that it has duly caused this Post-Effective Amendment No. 78 to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Baltimore and State of Maryland, on the 16th day of April, 2014.

LEGG MASON GLOBAL ASSET MANAGEMENT TRUST
By:	/s/ Kenneth D. Fuller
	Kenneth D. Fuller
	President

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment to the Registrant’s Registration Statement has been signed below by the following persons in the capacities indicated below on April 16, 2014:

Signature	Title
/s/ Jennifer W. Murphy*	Chair and Trustee
Jennifer W. Murphy
/s/ Kenneth D. Fuller	President (Principal Executive Officer),
Kenneth D. Fuller	Chief Executive Officer and Trustee
/s/ Ruby P. Hearn*	Trustee
Ruby P. Hearn
/s/ Arnold L. Lehman*	Trustee
Arnold L. Lehman
/s/ Robin J.W. Masters*	Trustee
Robin J.W. Masters
/s/ Jill E. McGovern*	Trustee
Jill E. McGovern
/s/ Arthur S. Mehlman*	Trustee
Arthur S. Mehlman
/s/ G. Peter O’Brien*	Trustee
G. Peter O’Brien
/s/ S. Ford Rowan*	Trustee
S. Ford Rowan
/s/ Robert M. Tarola*	Trustee
Robert M. Tarola
/s/ Richard F. Sennett	Principal Financial and Accounting Officer
Richard F. Sennett

* By:	/s/ Richard M. Wachterman
	Richard M. Wachterman
	Attorney in Fact, pursuant to Power of Attorney filed herewith.

POWER OF ATTORNEY

I, the undersigned Trustee of one or more of the following investment companies (as set forth in the companies’ Registration Statements on Form N-1A):

LEGG MASON TAX-FREE INCOME FUND (033-37971; 811-06223)

LEGG MASON GLOBAL ASSET MANAGEMENT TRUST (333-162441; 811-22338)

LEGG MASON INVESTMENT TRUST (333-179640; 811-22670)

LEGG MASON GLOBAL ASSET MANAGEMENT VARIABLE TRUST (333-192838; 811-22910)

plus any other investment company for which Legg Mason Partners Fund Advisor, LLC or an affiliate thereof acts as investment adviser or manager and for which the undersigned individual serves as Trustee hereby severally constitute and appoint each of KENNETH D. FULLER, RICHARD SENNETT, CHRISTOPHER BERARDUCCI, ROBERT I. FRENKEL, RICHARD WACHTERMAN, THOMAS C. MANDIA, MARC A. DE OLIVERIA, MICHAEL KOCUR, ROSEMARY D. EMMENS, YI CHIA RACHEL KUO, ARTHUR C. DELIBERT and NDENISARYA M. BREGASI my true and lawful attorney-in-fact, with full power of substitution, and each with full power to sign for me and in my name in the appropriate capacity and only for those companies described above for which I serve as Trustee, any Registration Statements on Form N-1A, all Pre-Effective Amendments to any Registration Statements of the Funds, any and all Post-Effective Amendments to said Registration Statements, and any and all supplements or other instruments in connection therewith, to file the same with the Securities and Exchange Commission and the securities regulators of appropriate states and territories, and generally to do all such things in my name and behalf in connection therewith as said attorney-in-fact deems necessary or appropriate to comply with the provisions of the Securities Act of 1933 and the Investment Company Act of 1940, all related requirements of the Securities and Exchange Commission and all requirements of appropriate states and territories. I hereby ratify and confirm all that said attorney-in-fact or their substitutes may do or cause to be done by virtue hereof.

Any subsequently executed power of attorney that grants powers unrelated to the powers granted herein will not revoke nor supersede this power of attorney unless such subsequent power of attorney expressly states otherwise.

WITNESS my hand on the date set forth below at Baltimore, Maryland.

SIGNATURE	DATE
/s/ Jennifer W. Murphy	February 21, 2014
Jennifer W. Murphy
/s/ Kenneth D. Fuller	February 21, 2014
Kenneth D. Fuller
/s/ Ruby P. Hearn	February 14, 2014
Ruby P. Hearn
/s/ Arnold L. Lehman	February 13, 2014
Arnold L. Lehman
/s/ Robin J.W. Masters	February 13, 2014
Robin J.W. Masters
/s/ Jill E. McGovern	February 16, 2014
Jill E. McGovern
/s/ Arthur S. Mehlman	February 21, 2014
Arthur S. Mehlman
/s/ G. Peter O’Brien	February 21, 2014
G. Peter O’Brien
/s/ S. Ford Rowan	February 18, 2014
S. Ford Rowan
/s/ Robert M. Tarola	February 21, 2014
Robert M. Tarola

EXHIBIT INDEX

Index No.	Description of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Legg Mason Global Asset Management Trust
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014
Legg Mason Strategic Real Return Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	LEGG MASON STRATEGIC REAL RETURN FUND
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The fund seeks to provide an attractive long-term real return.
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 and hold shares 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 $25,000 in funds sold by Legg Mason Investor Services, LLC (“LMIS”), the fund’s distributor. More information about these and other discounts is available from your financial intermediary, in this Prospectus on page 26 under the heading “Sales charges” and in the fund’s statement of additional information (“SAI”) on page 53 under the heading “Sales Charge Waivers and Reductions.”
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, 2015
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 55% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	55.00%
Expense Footnotes [Text Block]	rr_ExpenseFootnotesTextBlock	The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions (except for brokerage commissions paid on purchases and sales of shares of ETFs), dividend expense on short sales, taxes and extraordinary expenses) so that total annual operating expenses are not expected to exceed 1.35%, 1.55%, 2.10%, 1.35%, 1.60%, 1.10% and 1.00% for Class A, A2, C, FI, R, I and IS shares, respectively, subject to recapture as described below. In addition, total annual fund operating expenses for Class IS shares will not exceed total annual fund operating expenses for Class I shares, subject to recapture as described below. These arrangements cannot be terminated prior to December 31, 2015 without the Board of Trustees’ (the “Board”) 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 operating expenses have fallen to a level below the limits described above.
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 $25,000 in funds sold by Legg Mason Investor Services, LLC (“LMIS”), the fund’s distributor.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 25,000
Other Expenses, New Fund, Based on Estimates [Text]	rr_OtherExpensesNewFundBasedOnEstimates	“Other expenses” for Class FI and R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]	rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees	Total fund operating expenses do not correlate with the ratios of expenses to average net assets reported in the consolidated financial highlights contained in this Prospectus and in the fund’s shareholder reports, which reflect the fund’s operating expenses and do not include acquired fund fees and expenses.
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: You invest $10,000 in the fund for the time periods indicated Your investment has a 5% return each year and the fund’s operating expenses remain the same You reinvest all distributions and dividends without a sales charge Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	Number of years you own your shares ($)
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, using a tactical asset allocation program, seeks to provide an attractive long-term real return. The fund defines real return as total return reduced by the impact of inflation. In seeking to meet its investment goal, the fund implements a tactical asset allocation program overseen by the fund’s adviser, Legg Mason Global Asset Allocation, LLC (“LMGAA”). The fund may allocate its assets among five investment “sleeves” which the adviser believes are generally complementary to each other, with the following target allocations of the fund’s net assets: Inflation-Linked Debt Securities (40%) Global Equity Securities (20%) Commodity-Linked Securities (20%) Real Estate Investment Trusts (REITs) (10%) Tactical Strategy (10%) The composition and asset allocation of the fund’s investment portfolio will vary over time, based on LMGAA’s overall allocation decisions, and may be changed without shareholder approval. Asset allocation decisions are based primarily on LMGAA’s evaluation of future consumer price trends and the relative attractiveness of the asset classes in which the fund invests. These evaluations are based on modeling processes that assign probabilities to different inflation scenarios. The processes take into account several factors, including quantitative analysis, qualitative inputs and risk management guidelines. Actual allocations may deviate from each target allocation shown above by up to 50% of such target allocation. Holdings in a particular strategy may also vary because of performance differences among the different strategies. The fund utilizes a “multi-manager” approach, whereby each subadviser and the adviser provide day-to-day management for one or more of the investment sleeves. Each subadviser and the adviser use different investment strategies in managing the sleeves, act independently from the others in their management of the investment sleeve for which they are responsible, and use their own methodology for selecting investments. Currently, Western Asset Management Company (“Western Asset”), Western Asset Management Company Limited in London (“WAML”) and Western Asset Management Company Ltd. in Japan (“Western Japan”) manage the Inflation-Linked Debt Securities Sleeve, Batterymarch Financial Management, Inc. (“Batterymarch”) manages the Global Equity Securities Sleeve and LMGAA manages the Commodity-Linked Securities Sleeve, the REITs Sleeve and the Tactical Strategy Sleeve. LMGAA may also allocate a portion of the fund’s assets to ClearBridge Investments, LLC, either in place of, or in addition to, the subadvisers named above. Under normal market conditions, the Inflation-Linked Debt Securities Sleeve invests at least 80% of its net assets in inflation-indexed fixed income securities and at least 70% of its net assets in U.S. Treasury Inflation-Protected Securities (“TIPS”). The sleeve may also invest in foreign and domestic bonds, debentures and notes and high yield securities. Although the sleeve is expected to maintain a dollar-weighted average credit quality of at least A/A, it may invest up to 15% of its net assets in securities rated below investment grade (commonly known as “junk bonds”). Investment grade securities are securities rated at the time of purchase by a nationally recognized statistical ratings organization (“NRSRO”) within one of the top four categories, or, if unrated, determined by the applicable subadviser to be of comparable credit quality. Although the sleeve may invest in fixed income securities of any maturity, the target average effective duration of the sleeve is expected to range within 3 years of the Barclays U.S. Government Inflation-linked Bond (“U.S. TIPS”) Index. Based on the securities that make up the U.S. TIPS Index, the range within which the average effective duration of the sleeve is currently expected to fluctuate is 6-12 years, although this may vary. The sleeve may also sell protection in connection with credit default swaps relating to corporate debt securities. The notional amount of the credit default swaps will not exceed 20% of the sleeve’s net assets at the time of investment. The sleeve’s portfolio managers employ an active process that is both top-down and bottom-up. The portfolio managers believe that unique value opportunities can be identified through in-depth and disciplined issue, issuer and sub-sector selection. Duration management, yield curve positioning and sector exposure driven by long-term perceptions of economic behavior and relative valuations are integral to the portfolio managers’ investment process. Under normal market conditions, the Global Equity Securities Sleeve invests primarily in the common stock of domestic and foreign issuers, particularly issuers that have historically shown higher than average correlations to the components (core and food/energy) of the U.S. Consumer Price Index (“CPI”). The sleeve may invest in both U.S. and non-U.S. issuers, and may invest up to 20% of its net assets in securities of issuers located in emerging markets. The sleeve may invest in securities of companies of any market capitalization, including large-, mid- and small-capitalization companies. The sleeve usually invests in securities listed on securities exchanges, although it may invest up to 10% of its net assets in securities that are not registered for sale to the general public. The sleeve may invest directly in foreign securities or may invest in depositary receipts for securities of foreign issuers. The sleeve may, but is not required to, enter into forward currency transactions to buy or sell currencies at a future date. The sleeve may enter into these forward currency contracts only to settle transactions in securities quoted in foreign currencies and for hedging purposes. The sleeve may invest in exchange-traded funds (“ETFs”) and other investment companies to pursue its strategies. The sleeve’s portfolio managers use a blend of quantitative and fundamental investment techniques to select investments. Under normal market conditions, the Commodity-Linked Securities Sleeve invests primarily in a combination of commodity-linked instruments that provide exposure to the investment returns of the commodities markets, without investing directly in physical commodities. These instruments include master limited partnerships (“MLPs”), structured notes, bonds, debentures and derivatives, including swaps, forwards, futures and options. The sleeve may invest in these instruments through a wholly-owned subsidiary managed by LMGAA, other investment companies, ETFs and exchange-traded notes (“ETNs”) and may invest in cash, cash equivalents, money market funds or other similar instruments. Commodities are assets that have tangible properties, such as oil, metals and agricultural products. The sleeve’s portfolio managers use fundamental investment techniques to select investments. Under normal market conditions, the REITs Sleeve attempts to obtain exposure to the investment returns of the real estate markets by investing primarily in ETFs that hold U.S. and non-U.S. equity securities issued by REITs. Under normal market conditions, the Tactical Strategy Sleeve attempts to diversify the fund’s risk exposure by investing in asset classes that LMGAA believes will deliver returns that are not highly correlated with those of the fund’s other asset classes, especially during times of high market volatility and market stress. To achieve this goal, the sleeve uses a variety of quantitative and fundamental asset allocation and investment techniques. Determination of asset class exposure and selection of investment techniques depends on LMGAA’s analysis of economic trends and LMGAA’s predictions as to how various instruments and markets will correlate to one another and to economic developments. The sleeve may invest in investment companies, including ETFs, that hold domestic and foreign (including emerging markets) equity and fixed income securities, cash, cash equivalents and/or Treasury bonds. The fund may invest in “short” ETFs that seek a return similar to the inverse, or a multiple of the inverse, of a reference index. Certain investment companies and/or ETFs that the fund may invest in are benchmarked to indices that use a futures-based momentum methodology in an attempt to track prices of commodity and financial futures contracts. Investment companies using this methodology typically short the market when quantitative models anticipate declining prices. The sleeve may invest in futures to gain exposure to equity and fixed income markets and may invest in equity and equity volatility options to attempt to mitigate the effects of large unexpected declines in equity and other capital markets. The sleeve may also invest in certain currency derivatives in connection with the fund’s target net exposure to non-U.S. Dollar currencies. Under normal market conditions, the fund expects to target a 50% net exposure to the U.S. Dollar (USD). Each subadviser manages its sleeve’s currency exposure independently of the fund’s overall USD exposure target. LMGAA will monitor and calculate the fund’s currency exposure daily. For purposes of this calculation, currency exposure will be determined by the local currency of a security’s issuer. To maintain the fund’s target currency exposure, LMGAA will purchase (as needed) currency instruments such as currency swaps and forward currency contracts using assets from the Tactical Strategy Sleeve. LMGAA will purchase currency instruments based on its analysis of which foreign currencies it believes may provide the most effective hedges against future increases in U.S. inflation. At times, the fund may deviate either up or down from its target currency allocation due to market conditions. In addition, the fund at times may be both long and short foreign currencies in its non-USD allocation. The fund will not necessarily hedge its foreign currency exposure. The fund may borrow money, including for investment and cash management purposes, in amounts up to 33-1/3% of the fund’s total assets, including borrowings, a practice known as “leveraging.” In addition, the fund may engage in transactions that have a leveraging effect on the fund, including investments in derivatives such as futures and options for hedging and non-hedging purposes. The fund may invest a significant portion of its assets in these types of investments. 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
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	Risk is inherent in all investing. There is no assurance that the fund will meet its investment objective. The value of your investment in the fund, as well as the amount of return you receive on your investment, may fluctuate significantly. You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments. The fund may take temporary defensive positions; in such a case, the fund will not be pursuing its principal investment strategies. The fund may be exposed to these risks directly or indirectly as a result of its investments in investment vehicles such as the fund’s wholly-owned subsidiary, other investment companies, ETFs, ETNs and MLPs. The fund is intended primarily to provide a long-term return that is greater than the effects of inflation; however, there is no assurance that it will do so. The fund will not necessarily protect against a loss, and may underperform against the broader equity markets. The fund’s investment strategies and portfolio investments differ from those of many other mutual funds. The subadviser may devote a significant portion of the fund’s assets to pursuing an investment opportunity or strategy, including through the use of derivatives that create a form of investment leverage in the fund. This approach to investing may make the fund a more volatile investment than other mutual funds and cause the fund to perform less favorably than other mutual funds under similar market or economic conditions. Inflationary periods may differ from one another in their effect on the securities, commodities and real estate markets, depending on, among other reasons, the root causes of the inflation, whether it is accompanied by other macroeconomic phenomena, and the nature and extent of any governmental programs to curtail the inflation. The adviser will allocate the assets to the sleeves based on its evaluation of the factors causing and surrounding inflation or that may impact inflationary trends in the future, and its predictions as to how the securities and commodity instruments and markets will perform, and as to whether and how it believes the various instruments and markets will correlate to one another and to economic trends, if at all. It may be very difficult to predict these matters. If the adviser is incorrect in its efforts to forecast or evaluate these factors or optimally allocate assets, fund performance may be affected negatively. The portfolio managers’ selection of various instruments for the fund is based in part on historical data showing their performance in previous inflationary and other periods. Certain instruments the fund may use have not been in existence long enough to have a history that reflects prior periods of high inflation or other economic events. Instruments may also deviate from their historic patterns. The following is a summary description of certain risks of investing in the fund. Market and interest rate risk. The market prices of the fund’s securities may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. When market prices fall, the value of your investment will go down. 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. Issuer risk. The value of a security 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 security. 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. 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. Multi-manager risk. While LMGAA monitors the investments of each subadviser and monitors the overall management of the fund, the adviser and each subadviser make investment decisions for the investment sleeves independently from one another. It is possible that the investment styles used by a subadviser or adviser in an investment sleeve will not always be complementary to those used by others, which could adversely affect the performance of the fund. Portfolio selection risk. The value of your investment may decrease if the adviser’s or subadvisers’ judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about market movements is incorrect. Model risk. The adviser’s or subadvisers’ 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. Market sector risk. The fund may be significantly overweight or underweight certain companies, industries or market sectors, which may cause the fund’s performance to be more sensitive to developments affecting those companies, industries or sectors. Large capitalization company risk. Large capitalization companies may fall out of favor with investors. Small and medium capitalization company risk. 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. Liquidity risk. Some assets held by the fund may be impossible or difficult to sell, particularly during times of market turmoil. These illiquid assets 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. Leveraging risk. The value of your investment may be more volatile if the fund borrows or uses derivatives or other investments that have a leveraging effect on the fund’s portfolio. Other risks also will be compounded. This is 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. 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. The adviser and subadvisers expect that the implementation of the fund’s investment strategy, which may include a significant level of investment in derivatives, could have the effect of creating leverage in the fund in that the fund’s potential exposure may be greater than its net assets. 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 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 are considered speculative, have a higher risk of default, tend to be less liquid and are more difficult to value than higher grade securities. Junk bonds tend to be volatile and more susceptible to adverse events and negative sentiments. Prepayment or call risk. 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 not benefit from the rise in market price 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 the prepaid security. The fund may also lose any premium it paid on the security. Extension risk. When interest rates rise, repayments of fixed income securities, particularly asset- and mortgage-backed 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. 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. Foreign countries in which the fund may invest may have markets that are less liquid, less regulated and more volatile than U.S. 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 government actions, and political or financial instability. Lack of information may also affect the value of these securities. 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 fully developed and are less stable than those of more developed countries. 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. Currency risk. 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 conditions, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls and speculation. 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. Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivatives themselves behave in a way not anticipated by the fund. 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 be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. The U.S. government is in the process of adopting and implementing 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 them more costly, may limit their availability, may disrupt markets or may otherwise adversely affect their value or performance. 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, and they increase credit risk since the fund has exposure to both the issuer whose credit is the subject of the swap and the counterparty to the swap. Commodities risk. Investing in commodity-linked instruments may subject the fund to greater volatility than investments in traditional securities. The value of commodity-linked instruments may be affected by changes in overall market movements, commodity index volatility, prolonged or intense speculation by investors, changes in interest rates or factors affecting a particular industry or commodity, such as drought, floods, other weather phenomena, livestock disease, embargoes, tariffs and international economic, political and regulatory developments. The prices of commodities can also fluctuate widely due to supply and demand disruptions in major producing or consuming regions. To the extent the fund focuses its investments in a particular commodity, the fund will be more susceptible to risks associated with the particular commodity. No active trading market may exist for certain commodities investments. Commodity regulatory risk. The fund is deemed a “commodity pool” and the fund’s manager is considered a “commodity pool operator” with respect to the fund under the Commodity Exchange Act. The fund’s manager is therefore subject to dual regulation by the Securities and Exchange Commission (“SEC”) and the Commodity Futures Trading Commission (“CFTC”). Due to recent regulatory changes, additional regulatory requirements may be imposed and additional expenses may be incurred by the fund. The regulatory requirements governing the use of commodity futures (which include futures on broad-based securities indexes, interest rate futures and currency futures), options on commodity futures, certain swaps or certain other investments could change at any time. Segregated assets risk. In connection with certain transactions that may give rise to future payment obligations, including borrowings and many types of derivatives, the fund may be required to maintain a segregated amount of cash or liquid securities to cover the position. Segregated securities cannot be sold while the position they are covering is outstanding, unless they are replaced with other securities of equal value. As a result, there is the possibility that segregation of a large percentage of the fund’s assets may, in some circumstances, limit the portfolio managers’ flexibility. Inflation-indexed securities risk. The values of inflation-indexed fixed income securities generally fluctuate in response to changes in real interest rates (approximately nominal interest rates minus the inflation rate). Although the principal value of many inflation-indexed securities declines in periods of deflation, holders at maturity receive no less than the par value of the security. However, if the fund purchases inflation-indexed securities in the secondary market whose principal values have been adjusted upward due to inflation since issuance, the fund may experience a loss if there is a subsequent period of deflation or lower level of inflation. 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. Because an increase in principal value of an inflation-indexed security is treated as taxable income to the owner in the year the adjustment is made, even though no cash is paid out, the fund could be required to sell other securities to pay taxes on this income, including when it is not advantageous to do so. Inflation-indexed securities do not protect against the decline in value of debt securities caused by increases in nominal interest rates. MLP risk. Holders of MLP units have limited control and voting rights on matters affecting the partnership. In addition, there are certain tax risks associated with an investment in MLP units and the potential for conflicts of interest exist between common unit holders and the general partner, including those arising from incentive distribution payments. The benefit the fund derives from investment in MLP units is largely dependent on the MLPs being treated as partnerships and not as corporations for federal income tax purposes. If an MLP were classified as a corporation for federal income tax purposes, there would be reduction in the after-tax return to the fund of distributions from the MLP, likely causing a reduction in the value of the fund’s shares. MLP entities are typically focused in the energy, natural resources and real estate sectors of the economy. A downturn in the energy, natural resources or real estate sectors of the economy could have an adverse impact on the fund. At times, the performance of securities of companies in the energy, natural resources and real estate sectors of the economy may lag the performance of other sectors or the broader market as a whole. MLPs are generally considered interest-rate sensitive investments, and during periods of interest rate volatility, may not provide attractive returns. REIT risk. The value of Real Estate Investment Trusts, or REITs, may be affected by the condition of the economy as a whole and changes in the value of the underlying real estate, the creditworthiness of the issuer of the investments and property taxes, interest rates, liquidity of the credit markets and the real estate regulatory environment. REITs that concentrate their holdings in specific businesses, such as apartments, offices or retail space, will be affected by conditions affecting those businesses. Short positions risk. Short positions involve leverage and there is no limit on the 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 position. ETF and ETN risk. The fund may gain exposure to commodities, REITs and other investments by investing in ETFs and exchange-traded notes, or ETNs, that focus on these types of investments. Investing in an ETF or ETN will give the fund exposure to the securities that the ETF or ETN holds in its portfolio. The fund may invest in “short” ETFs which carry additional risks because they may invest in a variety of derivatives and may engage in short sales. ETFs are bought and sold based on market values, which rarely equal the actual net asset value of their portfolio holdings and, therefore, they could trade at either a premium or discount to net asset value. The fund will indirectly bear its pro rata share of the fees and expenses incurred by an ETF it invests in, including advisory fees, and will pay brokerage commissions in connection with the purchase and sale of shares of ETFs. ETFs that invest in commodities may be, or may become, subject to regulatory trading limits that could hurt the value of their securities. Additionally, ETNs and some ETFs are not structured as investment companies and thus are not regulated under the 1940 Act. An ETN’s value generally depends on the performance of the underlying index and the credit rating of the issuer. Subsidiary risk. By investing in a wholly-owned subsidiary, the fund is indirectly exposed to the risks associated with the subsidiary’s investments. Changes in the laws of the Cayman Islands, under which the subsidiary is organized, or changes in the laws of the United States, could prevent the subsidiary from operating as described in this Prospectus and could negatively affect the fund and its shareholders. There may also be federal income tax risks associated with the fund’s investment in a wholly-owned subsidiary. 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. 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 the security or had used a different valuation methodology. Recent market events risk. The global financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities and unprecedented volatility in the markets. Governmental and non-governmental issuers (notably in Europe) have defaulted on, or been forced to restructure their debts; and many other issuers have faced difficulties obtaining credit or refinancing existing obligations. These market conditions may continue, worsen or spread, including in the United States, Europe and elsewhere. Further defaults or restructurings by governments and others of their debt could have additional adverse effects on economies, financial markets and asset valuations around the world. In response to the crisis, the U.S. government and the Federal Reserve, as well as certain foreign governments and their central banks have taken steps to support financial markets, including by keeping interest rates at historically low levels. More recently, the Federal Reserve has reduced its market support activities. Further reduction or withdrawal of this support, failure of efforts in response to the crisis, or investor perception that such efforts are not succeeding could negatively affect financial markets generally as well as result in higher interest rates, increase market volatility and reduce the value and liquidity of certain securities. This environment could make identifying investment risks and opportunities especially difficult for the adviser and subadvisers, and whether or not the fund invests in securities of issuers located in or with significant exposure to countries experiencing economic and financial difficulties, the value and liquidity of the fund’s investments may be negatively affected. In addition, policy and legislative changes in the United States and in other countries are affecting many aspects of financial regulation. The impact of these changes on the markets, and the practical implications for market participants, may not be fully known for some time. Risk of increase in expenses. 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. Funds of funds investments risk. The fund may be an investment option for other Legg Mason-advised mutual funds that are managed as “funds of funds.” As a result, from time to time, the fund may experience relatively large redemptions or investments and could be required to sell securities or to invest cash at a time when it is not advantageous to do so. These risks are discussed in more detail later in this Prospectus or in the SAI.
Risk Lose Money [Text]	rr_RiskLoseMoney	You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	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.
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 an index or other benchmark. 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 the fund’s website, http://www.leggmason.com/individualinvestors/prospectuses (click on the name of the fund), or by calling the fund at 1-877-721-1926. 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 an index or other benchmark.
Performance Additional Market Index [Text]	rr_PerformanceAdditionalMarketIndex	The Composite Index reflects the blended rate of return of the following underlying indices: 40% Barclays Capital U.S. TIPS Index, 20% MSCI All Country World Index, 20% S&P GSCI®, 10% FTSE NAREIT All REITs Index and 10% Citigroup 1-Month U.S. Treasury Bill Index. Effective November 30, 2011, this Composite Index is hedged to 40% exposure to the U.S. dollar, as defined by the U.S. Dollar Index (USDX). The Composite Index’s unhedged currency exposure is predominantly U.S. dollar-based. The Fund’s target hedged currency exposure is 40% U.S. dollar, 60% non-U.S. dollar. The Fund may deviate, either up or down, from its target currency allocation due to market conditions. To better align the components of the Composite Index with the Fund’s target currency exposure, a 40% U.S. dollar hedge is applied to the Composite Index by subtracting the returns of the USDX from 40% of the blended rate of return of the Composite Index. Prior to November 30, 2011, the Composite Index was hedged to 50% exposure to the USDX.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-877-721-1926
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://www.leggmason.com/individualinvestors/prospectuses (click on the name of the fund)
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 (ended 12/31/2011): 6.52     Worst Quarter (ended 09/30/2011): (10.37)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns (%) (for periods ended December 31, 2013)
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-deferred 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-deferred 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-deferred 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.
Legg Mason Strategic Real Return Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.52%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.56%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.21%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.35%
1 year	rr_ExpenseExampleYear01	705
3 years	rr_ExpenseExampleYear03	1,020
5 years	rr_ExpenseExampleYear05	1,358
10 years	rr_ExpenseExampleYear10	2,308
1 year	rr_ExpenseExampleNoRedemptionYear01	705
3 years	rr_ExpenseExampleNoRedemptionYear03	1,020
5 years	rr_ExpenseExampleNoRedemptionYear05	1,358
10 years	rr_ExpenseExampleNoRedemptionYear10	2,308
2011	rr_AnnualReturn2011	2.80%
2012	rr_AnnualReturn2012	8.59%
2013	rr_AnnualReturn2013	1.79%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Dec. 31, 2011
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	6.52%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(10.37%)
1 year	rr_AverageAnnualReturnYear01	(4.09%)
Since inception	rr_AverageAnnualReturnSinceInception	4.80%
Inception date	rr_AverageAnnualReturnInceptionDate	Feb. 26, 2010
Legg Mason Strategic Real Return Fund | Class A2
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.83%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.87%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.32%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.55%
1 year	rr_ExpenseExampleYear01	724
3 years	rr_ExpenseExampleYear03	1,100
5 years	rr_ExpenseExampleYear05	1,500
10 years	rr_ExpenseExampleYear10	2,615
1 year	rr_ExpenseExampleNoRedemptionYear01	724
3 years	rr_ExpenseExampleNoRedemptionYear03	1,100
5 years	rr_ExpenseExampleNoRedemptionYear05	1,500
10 years	rr_ExpenseExampleNoRedemptionYear10	2,615
1 year	rr_AverageAnnualReturnYear01	(4.17%)	[4]
Since inception	rr_AverageAnnualReturnSinceInception	(1.79%)	[4]
Inception date	rr_AverageAnnualReturnInceptionDate	Oct. 31, 2012	[4]
Legg Mason Strategic Real Return Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.68%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.47%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.37%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	2.10%
1 year	rr_ExpenseExampleYear01	313
3 years	rr_ExpenseExampleYear03	734
5 years	rr_ExpenseExampleYear05	1,282
10 years	rr_ExpenseExampleYear10	2,778
1 year	rr_ExpenseExampleNoRedemptionYear01	213
3 years	rr_ExpenseExampleNoRedemptionYear03	734
5 years	rr_ExpenseExampleNoRedemptionYear05	1,282
10 years	rr_ExpenseExampleNoRedemptionYear10	2,778
1 year	rr_AverageAnnualReturnYear01	0.09%
Since inception	rr_AverageAnnualReturnSinceInception	5.67%
Inception date	rr_AverageAnnualReturnInceptionDate	Feb. 26, 2010
Legg Mason Strategic Real Return 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) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.53%	[5]
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.57%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.22%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.35%
1 year	rr_ExpenseExampleYear01	137
3 years	rr_ExpenseExampleYear03	474
5 years	rr_ExpenseExampleYear05	834
10 years	rr_ExpenseExampleYear10	1,849
1 year	rr_ExpenseExampleNoRedemptionYear01	137
3 years	rr_ExpenseExampleNoRedemptionYear03	474
5 years	rr_ExpenseExampleNoRedemptionYear05	834
10 years	rr_ExpenseExampleNoRedemptionYear10	1,849
Legg Mason Strategic Real Return Fund | Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.53%	[5]
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.82%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.22%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.60%
1 year	rr_ExpenseExampleYear01	163
3 years	rr_ExpenseExampleYear03	551
5 years	rr_ExpenseExampleYear05	965
10 years	rr_ExpenseExampleYear10	2,121
1 year	rr_ExpenseExampleNoRedemptionYear01	163
3 years	rr_ExpenseExampleNoRedemptionYear03	551
5 years	rr_ExpenseExampleNoRedemptionYear05	965
10 years	rr_ExpenseExampleNoRedemptionYear10	2,121
Legg Mason Strategic Real Return 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) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.51%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.30%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.20%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.10%
1 year	rr_ExpenseExampleYear01	112
3 years	rr_ExpenseExampleYear03	393
5 years	rr_ExpenseExampleYear05	694
10 years	rr_ExpenseExampleYear10	1,550
1 year	rr_ExpenseExampleNoRedemptionYear01	112
3 years	rr_ExpenseExampleNoRedemptionYear03	393
5 years	rr_ExpenseExampleNoRedemptionYear05	694
10 years	rr_ExpenseExampleNoRedemptionYear10	1,550
1 year	rr_AverageAnnualReturnYear01	2.05%
Since inception	rr_AverageAnnualReturnSinceInception	6.70%
Inception date	rr_AverageAnnualReturnInceptionDate	Feb. 26, 2010
Legg Mason Strategic Real Return Fund | Class IS
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.04%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.13%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.13%)	[3]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.00%
1 year	rr_ExpenseExampleYear01	102
3 years	rr_ExpenseExampleYear03	346
5 years	rr_ExpenseExampleYear05	609
10 years	rr_ExpenseExampleYear10	1,361
1 year	rr_ExpenseExampleNoRedemptionYear01	102
3 years	rr_ExpenseExampleNoRedemptionYear03	346
5 years	rr_ExpenseExampleNoRedemptionYear05	609
10 years	rr_ExpenseExampleNoRedemptionYear10	$ 1,361
1 year	rr_AverageAnnualReturnYear01	2.15%	[6]
Since inception	rr_AverageAnnualReturnSinceInception	6.54%	[6]
Inception date	rr_AverageAnnualReturnInceptionDate	Dec. 15, 2011	[6]
Legg Mason Strategic Real Return Fund | Return after taxes on distributions | Class A
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	(4.80%)
Since inception	rr_AverageAnnualReturnSinceInception	3.99%
Legg Mason Strategic Real Return Fund | Return after taxes on distributions and sale of fund shares | Class A
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	(1.87%)
Since inception	rr_AverageAnnualReturnSinceInception	3.47%
Legg Mason Strategic Real Return Fund | Barclays U.S. TIPS Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	(8.61%)
Since inception	rr_AverageAnnualReturnSinceInception	4.29%
Legg Mason Strategic Real Return Fund | Composite Index
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	0.68%	[7]
Since inception	rr_AverageAnnualReturnSinceInception	6.11%	[7]

[1] Generally,

[2] If your shares are held in a direct account and 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 (with an annual maximum of $15.00 per account). Direct accounts generally include accounts held in the name of the individual investor on the fund's books and records.

[3] Total fund operating expenses do not correlate with the ratios of expenses to average net assets reported in the consolidated financial highlights contained in this Prospectus and in the fund's shareholder reports, which reflect the fund's operating expenses and do not include acquired fund fees and expenses.

[4] For the period October 31, 2012 (commencement of operations of Class A2) to December 31, 2013, the average annual total return of the Barclays U.S. TIPS Index and the Composite Index were (7.56)% and 1.58%, respectively.

[5] "Other expenses" for Class FI and R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[6] For the period December 15, 2011 (commencement of operations of Class IS) to December 31, 2013, the average annual total return of the Barclays U.S. TIPS Index and the Composite Index were (1.13)% and 5.38%, respectively.

[7] The Composite Index reflects the blended rate of return of the following underlying indices: 40% Barclays Capital U.S. TIPS Index, 20% MSCI All Country World Index, 20% S&P GSCI®, 10% FTSE NAREIT All REITs Index and 10% Citigroup 1-Month U.S. Treasury Bill Index. Effective November 30, 2011, this Composite Index is hedged to 40% exposure to the U.S. dollar, as defined by the U.S. Dollar Index (USDX). The Composite Index's unhedged currency exposure is predominantly U.S. dollar-based. The Fund's target hedged currency exposure is 40% U.S. dollar, 60% non-U.S. dollar. The Fund may deviate, either up or down, from its target currency allocation due to market conditions. To better align the components of the Composite Index with the Fund's target currency exposure, a 40% U.S. dollar hedge is applied to the Composite Index by subtracting the returns of the USDX from 40% of the blended rate of return of the Composite Index. Prior to November 30, 2011, the Composite Index was hedged to 50% exposure to the USDX.

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Legg Mason Strategic Real Return Fund

LEGG MASON
STRATEGIC REAL RETURN FUND

Investment objective

The fund seeks to provide an attractive long-term real return.

Fees and expenses of the fund

The accompanying table describes the fees and expenses that you may pay if you buy and hold shares 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 $25,000 in funds sold by Legg Mason Investor Services, LLC (“LMIS”), the fund’s distributor. More information about these and other discounts is available from your financial intermediary, in this Prospectus on page 26 under the heading “Sales charges” and in the fund’s statement of additional information (“SAI”) on page 53 under the heading “Sales Charge Waivers and Reductions.”

Shareholder fees
(fees paid directly from your investment)

Shareholder Fees Legg Mason Strategic Real Return Fund (USD $)		Class A		Class A2		Class C	Class FI	Class R	Class I	Class IS
Maximum sales charge (load) imposed on purchases (as a % of offering price)		5.75%		5.75%		none	none	none	none	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time)		none	[1]	none	[1]	1.00%	none	none	none	none
Small account fee ($)	[2]	15		15		15	none	none	none	none

Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Legg Mason Strategic Real Return Fund		Class A	Class A2	Class C	Class FI		Class R		Class I	Class IS
Management fees		0.75%	0.75%	0.75%	0.75%		0.75%		0.75%	0.75%
Distribution and/or service (12b-1) fees		0.25%	0.25%	1.00%	0.25%		0.50%		none	none
Other expenses		0.52%	0.83%	0.68%	0.53%	[1]	0.53%	[1]	0.51%	0.34%
Acquired fund fees and expenses		0.04%	0.04%	0.04%	0.04%		0.04%		0.04%	0.04%
Total annual fund operating expenses		1.56%	1.87%	2.47%	1.57%		1.82%		1.30%	1.13%
Fees waived and/or expenses reimbursed	[2]	(0.21%)	(0.32%)	(0.37%)	(0.22%)		(0.22%)		(0.20%)	(0.13%)
Total annual fund operating expenses after waiving fees and/or reimbursing expenses		1.35%	1.55%	2.10%	1.35%		1.60%		1.10%	1.00%

The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions (except for brokerage commissions paid on purchases and sales of shares of ETFs), dividend expense on short sales, taxes and extraordinary expenses) so that total annual operating expenses are not expected to exceed 1.35%, 1.55%, 2.10%, 1.35%, 1.60%, 1.10% and 1.00% for Class A, A2, C, FI, R, I and IS shares, respectively, subject to recapture as described below. In addition, total annual fund operating expenses for Class IS shares will not exceed total annual fund operating expenses for Class I shares, subject to recapture as described below. These arrangements cannot be terminated prior to December 31, 2015 without the Board of Trustees’ (the “Board”) 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 operating expenses have fallen to a level below the limits described above.

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:

• You invest $10,000 in the fund for the time periods indicated

• Your investment has a 5% return each year and the fund’s operating expenses remain the same

• 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:

Number of years you own your shares ($)

Expense Example Legg Mason Strategic Real Return Fund (USD $)	1 year	3 years	5 years	10 years
Class A	705	1,020	1,358	2,308
Class A2	724	1,100	1,500	2,615
Class C	313	734	1,282	2,778
Class FI	137	474	834	1,849
Class R	163	551	965	2,121
Class I	112	393	694	1,550
Class IS	102	346	609	1,361

Number of years you own your shares ($)

Expense Example, No Redemption Legg Mason Strategic Real Return Fund (USD $)	1 year	3 years	5 years	10 years
Class A	705	1,020	1,358	2,308
Class A2	724	1,100	1,500	2,615
Class C	213	734	1,282	2,778
Class FI	137	474	834	1,849
Class R	163	551	965	2,121
Class I	112	393	694	1,550
Class IS	102	346	609	1,361

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 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 55% of the average value of its portfolio.

Principal investment strategies

Under normal market conditions, the fund, using a tactical asset allocation program, seeks to provide an attractive long-term real return. The fund defines real return as total return reduced by the impact of inflation.

In seeking to meet its investment goal, the fund implements a tactical asset allocation program overseen by the fund’s adviser, Legg Mason Global Asset Allocation, LLC (“LMGAA”). The fund may allocate its assets among five investment “sleeves” which the adviser believes are generally complementary to each other, with the following target allocations of the fund’s net assets:

• Inflation-Linked Debt Securities (40%)

• Global Equity Securities (20%)

• Commodity-Linked Securities (20%)

• Real Estate Investment Trusts (REITs) (10%)

• Tactical Strategy (10%)

The composition and asset allocation of the fund’s investment portfolio will vary over time, based on LMGAA’s overall allocation decisions, and may be changed without shareholder approval. Asset allocation decisions are based primarily on LMGAA’s evaluation of future consumer price trends and the relative attractiveness of the asset classes in which the fund invests. These evaluations are based on modeling processes that assign probabilities to different inflation scenarios. The processes take into account several factors, including quantitative analysis, qualitative inputs and risk management guidelines. Actual allocations may deviate from each target allocation shown above by up to 50% of such target allocation. Holdings in a particular strategy may also vary because of performance differences among the different strategies.

The fund utilizes a “multi-manager” approach, whereby each subadviser and the adviser provide day-to-day management for one or more of the investment sleeves. Each subadviser and the adviser use different investment strategies in managing the sleeves, act independently from the others in their management of the investment sleeve for which they are responsible, and use their own methodology for selecting investments. Currently, Western Asset Management Company (“Western Asset”), Western Asset Management Company Limited in London (“WAML”) and Western Asset Management Company Ltd. in Japan (“Western Japan”) manage the Inflation-Linked Debt Securities Sleeve, Batterymarch Financial Management, Inc. (“Batterymarch”) manages the Global Equity Securities Sleeve and LMGAA manages the Commodity-Linked Securities Sleeve, the REITs Sleeve and the Tactical Strategy Sleeve. LMGAA may also allocate a portion of the fund’s assets to ClearBridge Investments, LLC, either in place of, or in addition to, the subadvisers named above.

Under normal market conditions, the Inflation-Linked Debt Securities Sleeve invests at least 80% of its net assets in inflation-indexed fixed income securities and at least 70% of its net assets in U.S. Treasury Inflation-Protected Securities (“TIPS”). The sleeve may also invest in foreign and domestic bonds, debentures and notes and high yield securities. Although the sleeve is expected to maintain a dollar-weighted average credit quality of at least A/A, it may invest up to 15% of its net assets in securities rated below investment grade (commonly known as “junk bonds”). Investment grade securities are securities rated at the time of purchase by a nationally recognized statistical ratings organization (“NRSRO”) within one of the top four categories, or, if unrated, determined by the applicable subadviser to be of comparable credit quality. Although the sleeve may invest in fixed income securities of any maturity, the target average effective duration of the sleeve is expected to range within 3 years of the Barclays U.S. Government Inflation-linked Bond (“U.S. TIPS”) Index. Based on the securities that make up the U.S. TIPS Index, the range within which the average effective duration of the sleeve is currently expected to fluctuate is 6-12 years, although this may vary. The sleeve may also sell protection in connection with credit default swaps relating to corporate debt securities. The notional amount of the credit default swaps will not exceed 20% of the sleeve’s net assets at the time of investment. The sleeve’s portfolio managers employ an active process that is both top-down and bottom-up. The portfolio managers believe that unique value opportunities can be identified through in-depth and disciplined issue, issuer and sub-sector selection. Duration management, yield curve positioning and sector exposure driven by long-term perceptions of economic behavior and relative valuations are integral to the portfolio managers’ investment process.

Under normal market conditions, the Global Equity Securities Sleeve invests primarily in the common stock of domestic and foreign issuers, particularly issuers that have historically shown higher than average correlations to the components (core and food/energy) of the U.S. Consumer Price Index (“CPI”). The sleeve may invest in both U.S. and non-U.S. issuers, and may invest up to 20% of its net assets in securities of issuers located in emerging markets. The sleeve may invest in securities of companies of any market capitalization, including large-, mid- and small-capitalization companies. The sleeve usually invests in securities listed on securities exchanges, although it may invest up to 10% of its net assets in securities that are not registered for sale to the general public. The sleeve may invest directly in foreign securities or may invest in depositary receipts for securities of foreign issuers. The sleeve may, but is not required to, enter into forward currency transactions to buy or sell currencies at a future date. The sleeve may enter into these forward currency contracts only to settle transactions in securities quoted in foreign currencies and for hedging purposes. The sleeve may invest in exchange-traded funds (“ETFs”) and other investment companies to pursue its strategies. The sleeve’s portfolio managers use a blend of quantitative and fundamental investment techniques to select investments.

Under normal market conditions, the Commodity-Linked Securities Sleeve invests primarily in a combination of commodity-linked instruments that provide exposure to the investment returns of the commodities markets, without investing directly in physical commodities. These instruments include master limited partnerships (“MLPs”), structured notes, bonds, debentures and derivatives, including swaps, forwards, futures and options. The sleeve may invest in these instruments through a wholly-owned subsidiary managed by LMGAA, other investment companies, ETFs and exchange-traded notes (“ETNs”) and may invest in cash, cash equivalents, money market funds or other similar instruments. Commodities are assets that have tangible properties, such as oil, metals and agricultural products. The sleeve’s portfolio managers use fundamental investment techniques to select investments.

Under normal market conditions, the REITs Sleeve attempts to obtain exposure to the investment returns of the real estate markets by investing primarily in ETFs that hold U.S. and non-U.S. equity securities issued by REITs.

Under normal market conditions, the Tactical Strategy Sleeve attempts to diversify the fund’s risk exposure by investing in asset classes that LMGAA believes will deliver returns that are not highly correlated with those of the fund’s other asset classes, especially during times of high market volatility and market stress. To achieve this goal, the sleeve uses a variety of quantitative and fundamental asset allocation and investment techniques. Determination of asset class exposure and selection of investment techniques depends on LMGAA’s analysis of economic trends and LMGAA’s predictions as to how various instruments and markets will correlate to one another and to economic developments. The sleeve may invest in investment companies, including ETFs, that hold domestic and foreign (including emerging markets) equity and fixed income securities, cash, cash equivalents and/or Treasury bonds. The fund may invest in “short” ETFs that seek a return similar to the inverse, or a multiple of the inverse, of a reference index. Certain investment companies and/or ETFs that the fund may invest in are benchmarked to indices that use a futures-based momentum methodology in an attempt to track prices of commodity and financial futures contracts. Investment companies using this methodology typically short the market when quantitative models anticipate declining prices. The sleeve may invest in futures to gain exposure to equity and fixed income markets and may invest in equity and equity volatility options to attempt to mitigate the effects of large unexpected declines in equity and other capital markets. The sleeve may also invest in certain currency derivatives in connection with the fund’s target net exposure to non-U.S. Dollar currencies.

Under normal market conditions, the fund expects to target a 50% net exposure to the U.S. Dollar (USD). Each subadviser manages its sleeve’s currency exposure independently of the fund’s overall USD exposure target. LMGAA will monitor and calculate the fund’s currency exposure daily. For purposes of this calculation, currency exposure will be determined by the local currency of a security’s issuer. To maintain the fund’s target currency exposure, LMGAA will purchase (as needed) currency instruments such as currency swaps and forward currency contracts using assets from the Tactical Strategy Sleeve. LMGAA will purchase currency instruments based on its analysis of which foreign currencies it believes may provide the most effective hedges against future increases in U.S. inflation. At times, the fund may deviate either up or down from its target currency allocation due to market conditions. In addition, the fund at times may be both long and short foreign currencies in its non-USD allocation. The fund will not necessarily hedge its foreign currency exposure.

The fund may borrow money, including for investment and cash management purposes, in amounts up to 33-1/3% of the fund’s total assets, including borrowings, a practice known as “leveraging.” In addition, the fund may engage in transactions that have a leveraging effect on the fund, including investments in derivatives such as futures and options for hedging and non-hedging purposes. The fund may invest a significant portion of its assets in these types of investments.

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.

Principal risks

Risk is inherent in all investing. There is no assurance that the fund will meet its investment objective. The value of your investment in the fund, as well as the amount of return you receive on your investment, may fluctuate significantly. You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments. The fund may take temporary defensive positions; in such a case, the fund will not be pursuing its principal investment strategies.

The fund may be exposed to these risks directly or indirectly as a result of its investments in investment vehicles such as the fund’s wholly-owned subsidiary, other investment companies, ETFs, ETNs and MLPs.

The fund is intended primarily to provide a long-term return that is greater than the effects of inflation; however, there is no assurance that it will do so. The fund will not necessarily protect against a loss, and may underperform against the broader equity markets.

The fund’s investment strategies and portfolio investments differ from those of many other mutual funds. The subadviser may devote a significant portion of the fund’s assets to pursuing an investment opportunity or strategy, including through the use of derivatives that create a form of investment leverage in the fund. This approach to investing may make the fund a more volatile investment than other mutual funds and cause the fund to perform less favorably than other mutual funds under similar market or economic conditions.

Inflationary periods may differ from one another in their effect on the securities, commodities and real estate markets, depending on, among other reasons, the root causes of the inflation, whether it is accompanied by other macroeconomic phenomena, and the nature and extent of any governmental programs to curtail the inflation. The adviser will allocate the assets to the sleeves based on its evaluation of the factors causing and surrounding inflation or that may impact inflationary trends in the future, and its predictions as to how the securities and commodity instruments and markets will perform, and as to whether and how it believes the various instruments and markets will correlate to one another and to economic trends, if at all. It may be very difficult to predict these matters. If the adviser is incorrect in its efforts to forecast or evaluate these factors or optimally allocate assets, fund performance may be affected negatively.

The portfolio managers’ selection of various instruments for the fund is based in part on historical data showing their performance in previous inflationary and other periods. Certain instruments the fund may use have not been in existence long enough to have a history that reflects prior periods of high inflation or other economic events. Instruments may also deviate from their historic patterns. The following is a summary description of certain risks of investing in the fund.

Market and interest rate risk. The market prices of the fund’s securities may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. When market prices fall, the value of your investment will go down. 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.

Issuer risk. The value of a security 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 security. 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.

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.

Multi-manager risk. While LMGAA monitors the investments of each subadviser and monitors the overall management of the fund, the adviser and each subadviser make investment decisions for the investment sleeves independently from one another. It is possible that the investment styles used by a subadviser or adviser in an investment sleeve will not always be complementary to those used by others, which could adversely affect the performance of the fund.

Portfolio selection risk. The value of your investment may decrease if the adviser’s or subadvisers’ judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about market movements is incorrect.

Model risk. The adviser’s or subadvisers’ 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.

Market sector risk. The fund may be significantly overweight or underweight certain companies, industries or market sectors, which may cause the fund’s performance to be more sensitive to developments affecting those companies, industries or sectors.

Large capitalization company risk. Large capitalization companies may fall out of favor with investors.

Small and medium capitalization company risk. 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.

Liquidity risk. Some assets held by the fund may be impossible or difficult to sell, particularly during times of market turmoil. These illiquid assets 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.

Leveraging risk. The value of your investment may be more volatile if the fund borrows or uses derivatives or other investments that have a leveraging effect on the fund’s portfolio. Other risks also will be compounded. This is 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. 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.

The adviser and subadvisers expect that the implementation of the fund’s investment strategy, which may include a significant level of investment in derivatives, could have the effect of creating leverage in the fund in that the fund’s potential exposure may be greater than its net assets.

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 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 are considered speculative, have a higher risk of default, tend to be less liquid and are more difficult to value than higher grade securities. Junk bonds tend to be volatile and more susceptible to adverse events and negative sentiments.

Prepayment or call risk. 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 not benefit from the rise in market price 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 the prepaid security. The fund may also lose any premium it paid on the security.

Extension risk. When interest rates rise, repayments of fixed income securities, particularly asset- and mortgage-backed 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.

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. Foreign countries in which the fund may invest may have markets that are less liquid, less regulated and more volatile than U.S. 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 government actions, and political or financial instability. Lack of information may also affect the value of these securities.

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 fully developed and are less stable than those of more developed countries. 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.

Currency risk. 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 conditions, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls and speculation.

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.

Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivatives themselves behave in a way not anticipated by the fund. 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 be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. The U.S. government is in the process of adopting and implementing 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 them more costly, may limit their availability, may disrupt markets or may otherwise adversely affect their value or performance.

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, and they increase credit risk since the fund has exposure to both the issuer whose credit is the subject of the swap and the counterparty to the swap.

Commodities risk. Investing in commodity-linked instruments may subject the fund to greater volatility than investments in traditional securities. The value of commodity-linked instruments may be affected by changes in overall market movements, commodity index volatility, prolonged or intense speculation by investors, changes in interest rates or factors affecting a particular industry or commodity, such as drought, floods, other weather phenomena, livestock disease, embargoes, tariffs and international economic, political and regulatory developments. The prices of commodities can also fluctuate widely due to supply and demand disruptions in major producing or consuming regions. To the extent the fund focuses its investments in a particular commodity, the fund will be more susceptible to risks associated with the particular commodity. No active trading market may exist for certain commodities investments.

Commodity regulatory risk. The fund is deemed a “commodity pool” and the fund’s manager is considered a “commodity pool operator” with respect to the fund under the Commodity Exchange Act. The fund’s manager is therefore subject to dual regulation by the Securities and Exchange Commission (“SEC”) and the Commodity Futures Trading Commission (“CFTC”). Due to recent regulatory changes, additional regulatory requirements may be imposed and additional expenses may be incurred by the fund. The regulatory requirements governing the use of commodity futures (which include futures on broad-based securities indexes, interest rate futures and currency futures), options on commodity futures, certain swaps or certain other investments could change at any time.

Segregated assets risk. In connection with certain transactions that may give rise to future payment obligations, including borrowings and many types of derivatives, the fund may be required to maintain a segregated amount of cash or liquid securities to cover the position. Segregated securities cannot be sold while the position they are covering is outstanding, unless they are replaced with other securities of equal value. As a result, there is the possibility that segregation of a large percentage of the fund’s assets may, in some circumstances, limit the portfolio managers’ flexibility.

Inflation-indexed securities risk. The values of inflation-indexed fixed income securities generally fluctuate in response to changes in real interest rates (approximately nominal interest rates minus the inflation rate). Although the principal value of many inflation-indexed securities declines in periods of deflation, holders at maturity receive no less than the par value of the security. However, if the fund purchases inflation-indexed securities in the secondary market whose principal values have been adjusted upward due to inflation since issuance, the fund may experience a loss if there is a subsequent period of deflation or lower level of inflation. 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. Because an increase in principal value of an inflation-indexed security is treated as taxable income to the owner in the year the adjustment is made, even though no cash is paid out, the fund could be required to sell other securities to pay taxes on this income, including when it is not advantageous to do so. Inflation-indexed securities do not protect against the decline in value of debt securities caused by increases in nominal interest rates.

MLP risk. Holders of MLP units have limited control and voting rights on matters affecting the partnership. In addition, there are certain tax risks associated with an investment in MLP units and the potential for conflicts of interest exist between common unit holders and the general partner, including those arising from incentive distribution payments. The benefit the fund derives from investment in MLP units is largely dependent on the MLPs being treated as partnerships and not as corporations for federal income tax purposes. If an MLP were classified as a corporation for federal income tax purposes, there would be reduction in the after-tax return to the fund of distributions from the MLP, likely causing a reduction in the value of the fund’s shares. MLP entities are typically focused in the energy, natural resources and real estate sectors of the economy. A downturn in the energy, natural resources or real estate sectors of the economy could have an adverse impact on the fund. At times, the performance of securities of companies in the energy, natural resources and real estate sectors of the economy may lag the performance of other sectors or the broader market as a whole. MLPs are generally considered interest-rate sensitive investments, and during periods of interest rate volatility, may not provide attractive returns.

REIT risk. The value of Real Estate Investment Trusts, or REITs, may be affected by the condition of the economy as a whole and changes in the value of the underlying real estate, the creditworthiness of the issuer of the investments and property taxes, interest rates, liquidity of the credit markets and the real estate regulatory environment. REITs that concentrate their holdings in specific businesses, such as apartments, offices or retail space, will be affected by conditions affecting those businesses.

Short positions risk. Short positions involve leverage and there is no limit on the 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 position.

ETF and ETN risk. The fund may gain exposure to commodities, REITs and other investments by investing in ETFs and exchange-traded notes, or ETNs, that focus on these types of investments. Investing in an ETF or ETN will give the fund exposure to the securities that the ETF or ETN holds in its portfolio. The fund may invest in “short” ETFs which carry additional risks because they may invest in a variety of derivatives and may engage in short sales. ETFs are bought and sold based on market values, which rarely equal the actual net asset value of their portfolio holdings and, therefore, they could trade at either a premium or discount to net asset value. The fund will indirectly bear its pro rata share of the fees and expenses incurred by an ETF it invests in, including advisory fees, and will pay brokerage commissions in connection with the purchase and sale of shares of ETFs. ETFs that invest in commodities may be, or may become, subject to regulatory trading limits that could hurt the value of their securities. Additionally, ETNs and some ETFs are not structured as investment companies and thus are not regulated under the 1940 Act. An ETN’s value generally depends on the performance of the underlying index and the credit rating of the issuer.

Subsidiary risk. By investing in a wholly-owned subsidiary, the fund is indirectly exposed to the risks associated with the subsidiary’s investments. Changes in the laws of the Cayman Islands, under which the subsidiary is organized, or changes in the laws of the United States, could prevent the subsidiary from operating as described in this Prospectus and could negatively affect the fund and its shareholders. There may also be federal income tax risks associated with the fund’s investment in a wholly-owned subsidiary.

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. 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 the security or had used a different valuation methodology.

Recent market events risk. The global financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities and unprecedented volatility in the markets.

Governmental and non-governmental issuers (notably in Europe) have defaulted on, or been forced to restructure their debts; and many other issuers have faced difficulties obtaining credit or refinancing existing obligations. These market conditions may continue, worsen or spread, including in the United States, Europe and elsewhere. Further defaults or restructurings by governments and others of their debt could have additional adverse effects on economies, financial markets and asset valuations around the world. In response to the crisis, the U.S. government and the Federal Reserve, as well as certain foreign governments and their central banks have taken steps to support financial markets, including by keeping interest rates at historically low levels. More recently, the Federal Reserve has reduced its market support activities. Further reduction or withdrawal of this support, failure of efforts in response to the crisis, or investor perception that such efforts are not succeeding could negatively affect financial markets generally as well as result in higher interest rates, increase market volatility and reduce the value and liquidity of certain securities.

This environment could make identifying investment risks and opportunities especially difficult for the adviser and subadvisers, and whether or not the fund invests in securities of issuers located in or with significant exposure to countries experiencing economic and financial difficulties, the value and liquidity of the fund’s investments may be negatively affected. In addition, policy and legislative changes in the United States and in other countries are affecting many aspects of financial regulation. The impact of these changes on the markets, and the practical implications for market participants, may not be fully known for some time.

Risk of increase in expenses. 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.

Funds of funds investments risk. The fund may be an investment option for other Legg Mason-advised mutual funds that are managed as “funds of funds.” As a result, from time to time, the fund may experience relatively large redemptions or investments and could be required to sell securities or to invest cash at a time when it is not advantageous to do so.

These risks are discussed in more detail later in this Prospectus or in the SAI.

Performance

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 an index or other benchmark. 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 the fund’s website, http://www.leggmason.com/individualinvestors/prospectuses (click on the name of the fund), or by calling the fund at 1-877-721-1926.

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.

Total returns (%)
Before taxes

Calendar Years ended December 31

Best Quarter (ended 12/31/2011): 6.52     Worst Quarter (ended 09/30/2011): (10.37)

Average annual total returns (%)
(for periods ended December 31, 2013)

Average Annual Total Returns Legg Mason Strategic Real Return Fund		1 year	Since inception	Inception date
Class A		(4.09%)	4.80%	Feb. 26, 2010
Class A Return after taxes on distributions		(4.80%)	3.99%
Class A Return after taxes on distributions and sale of fund shares		(1.87%)	3.47%
Class A2	[1]	(4.17%)	(1.79%)	Oct. 31, 2012
Class C		0.09%	5.67%	Feb. 26, 2010
Class I		2.05%	6.70%	Feb. 26, 2010
Class IS	[2]	2.15%	6.54%	Dec. 15, 2011
Barclays U.S. TIPS Index (reflects no deduction for fees, expenses or taxes)		(8.61%)	4.29%
Composite Index	[3]	0.68%	6.11%

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-deferred 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.

[1] Generally,

[2] If your shares are held in a direct account and 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 (with an annual maximum of $15.00 per account). Direct accounts generally include accounts held in the name of the individual investor on the fund's books and records.

[1] "Other expenses" for Class FI and R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[2] Total fund operating expenses do not correlate with the ratios of expenses to average net assets reported in the consolidated financial highlights contained in this Prospectus and in the fund's shareholder reports, which reflect the fund's operating expenses and do not include acquired fund fees and expenses.

[1] For the period October 31, 2012 (commencement of operations of Class A2) to December 31, 2013, the average annual total return of the Barclays U.S. TIPS Index and the Composite Index were (7.56)% and 1.58%, respectively.

[2] For the period December 15, 2011 (commencement of operations of Class IS) to December 31, 2013, the average annual total return of the Barclays U.S. TIPS Index and the Composite Index were (1.13)% and 5.38%, respectively.

[3] The Composite Index reflects the blended rate of return of the following underlying indices: 40% Barclays Capital U.S. TIPS Index, 20% MSCI All Country World Index, 20% S&P GSCI®, 10% FTSE NAREIT All REITs Index and 10% Citigroup 1-Month U.S. Treasury Bill Index. Effective November 30, 2011, this Composite Index is hedged to 40% exposure to the U.S. dollar, as defined by the U.S. Dollar Index (USDX). The Composite Index's unhedged currency exposure is predominantly U.S. dollar-based. The Fund's target hedged currency exposure is 40% U.S. dollar, 60% non-U.S. dollar. The Fund may deviate, either up or down, from its target currency allocation due to market conditions. To better align the components of the Composite Index with the Fund's target currency exposure, a 40% U.S. dollar hedge is applied to the Composite Index by subtracting the returns of the USDX from 40% of the blended rate of return of the Composite Index. Prior to November 30, 2011, the Composite Index was hedged to 50% exposure to the USDX.

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Nov. 30, 2013
Registrant Name	dei_EntityRegistrantName	Legg Mason Global Asset Management Trust
Central Index Key	dei_EntityCentralIndexKey	0001474103
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Mar. 24, 2014
Document Effective Date	dei_DocumentEffectiveDate	Mar. 31, 2014
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Legg Mason Global Asset Management Trust
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014
Document Creation Date	dei_DocumentCreationDate	Mar. 24, 2014