497

October 12, 2012

Adam M. Schlichtmann

617-951-7114

617-235-7346 fax

adam.schlichtmann@ropesgray.com

BY EDGAR

Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, D.C. 20549

Re: Western Asset Core Bond Fund, Western Asset Core Plus Bond Fund and Western Asset Inflation Indexed Plus Bond Fund (each a “Fund”), each a series of Western Asset Funds, Inc. (the “Registrant”) (File Nos. 003-34929 and 811-06110)

Ladies and Gentlemen:

On behalf of the Registrant and pursuant to Rule 497(c) under the Securities Act of 1933, as amended, accompanying this letter for filing are exhibits containing an XBRL interactive data file relating to the risk/return summary information that appears in each Fund’s Prospectus dated October 3, 2012 filed with the Securities and Exchange Commission on September 28, 2012 under
Rule 497(c) (Accession No. 0001193125-12-409310).

If you have any questions concerning this filing, please call me at (617) 951-7114.

Very truly yours,

/s/ Adam M. Schlichtmann

Adam M. Schlichtmann

Enclosures

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	WESTERN ASSET FUNDS INC
Prospectus Date	rr_ProspectusDate	Oct. 03, 2012
Western Asset Inflation Indexed Plus Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Western Asset Inflation Indexed Plus Bond Fund
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Maximize total return, consistent with preservation of capital.
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 $100,000 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 30 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 70 under the heading "Sales Charge Waivers and Reductions."
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder 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, 2013
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 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 50% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	50.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in funds sold by Legg Mason Investor Services, LLC ("LMIS"), the fund's distributor.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	100,000
Other Expenses, New Fund, Based on Estimates [Text]	rr_OtherExpensesNewFundBasedOnEstimates	"Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.
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 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. The subadvisers use fundamental investment techniques to select issues. Although the fund may invest in securities of any maturity, the fund will normally maintain a dollar-weighted average effective duration, as estimated by the fund's subadvisers, within 3 years of that of its benchmark, the Barclays Capital U.S. TIPS Index. Therefore, the range within which the dollar-weighted average effective duration of the fund is expected to fluctuate is 6–12 years, although this may vary. Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of structural complexities (for example, some bonds can be prepaid by the issuer). The fund intends to sell protection in connection with credit default swaps relating to corporate debt securities. It is currently expected that the notional amount of the credit default swaps will not exceed 40% of the fund's net assets, although such exposure may exceed 40% from time to time. The fund is expected to maintain a dollar-weighted average credit quality of at least A/A. In addition, under normal market conditions, at the time of purchase:      no more than 20% of the fund's net assets may be invested in non-U.S. dollar denominated inflation-indexed securities      no more than 10% of the fund's net assets may be invested in un-hedged non-U.S. dollar denominated securities      no more than 20% of the fund's net assets may be invested in a combination of securities rated below investment grade, emerging market securities and loan participations and assignments      no more than 10% of the fund's net assets may be invested in securities rated below investment grade      no more than 10% of the fund's net assets may be invested in emerging market securities      no more than 10% of the fund's net assets may be invested in loan participations and assignments The fund considers a security to be rated below investment grade if it is not rated Baa/BBB or above by at least one Nationally Recognized Statistical Rating Organization ("NRSRO") or is unrated and of comparable quality as determined by the subadvisers. Securities rated below investment grade are commonly known as "junk bonds" or "high yield securities." The fund may also enter into various derivative transactions for both hedging and non-hedging purposes, including for purposes of enhancing returns. These derivative transactions include, but are not limited to, futures, options, swaps and forwards. In particular, the fund may use interest rate swaps, credit default swaps (on individual securities and/or baskets of securities), futures contracts and/or mortgage-backed securities to a significant extent, although the amounts invested in these instruments may change from time to time. Other instruments may also be used to a significant extent from time to time.
Risk [Heading]	rr_RiskHeading	Certain 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 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 may also 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. The financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the U.S. is changing many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time. 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 have a higher risk of default and are considered speculative. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness. Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivative instruments themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation are not yet fully known and may not be for some time. New regulation of derivatives may make them more costly, may limit their availability, or may otherwise adversely affect their value or performance. Credit default swap contracts involve special 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. Swaps may be difficult to unwind or terminate. The swap market could be disrupted or limited as a result of recent legislation, and these changes could adversely affect the fund. 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. Liquidity risk. Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss. Foreign securities and emerging market risk. Foreign securities are subject to a number of additional risks, including nationalization or expropriation of assets, imposition of currency controls or restrictions, confiscatory taxation, political or financial instability and other adverse economic or political developments. Lack of information and less market regulation also create increased risk. Risks are greater for investments in emerging markets. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more advanced countries. 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 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. 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. 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 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. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. Since changes in interest rates have a greater effect on the prices of longer-term securities, this extension in the securities' effective maturity magnifies the price decline caused by the increase in interest rates. Risk of investing in fewer issuers. To the extent the fund invests its assets in a small number of issuers, the fund will be more susceptible to negative events affecting those issuers. 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. Cash management and defensive investing risk. Money market instruments or short-term debt securities held by the fund for cash management or defensive investing purposes can fluctuate in value. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. In that case the fund would not earn income on the cash and the fund's yield would go down. If a significant amount of the fund's assets are used for cash management or defensive investing purposes, it will be more difficult for the fund to achieve its objective. Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses. Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond. Special risks of mortgage-backed and asset-backed securities. Mortgage-backed securities represent an interest in a pool of mortgages. The rate of mortgage prepayments may lengthen the effective maturity of these securities at a time when their value has declined or shorten the effective maturity of these securities at a time their value has increased. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. Investments in asset-backed securities are subject to similar risks. Portfolio selection risk. The value of your investment may decrease if the portfolio managers' judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect. These and other risks are discussed in more detail later in this Prospectus or in the Statement of Additional Information ("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.
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 I 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. No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus. The returns for Class A, Class C, Class C1 and Class R shares would differ from those of Class I shares to the extent Class A, Class C, Class C1 or Class R shares bear different expenses. The fund makes updated performance information available at the fund's website, http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class), 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.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	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 I 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 One Year or Less [Text]	rr_PerformanceOneYearOrLess	No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-877-721-1926
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class)
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Total returns (before taxes) (%)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Calendar Years ended December 31 Best quarter (09/30/2002): 8.00 Worst quarter (09/30/2008): (5.36)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns (for periods ended December 31, 2011) (%)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	The after-tax returns are shown only for Class I 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	After-tax returns for classes other than Class I will vary from returns shown for Class I.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The after-tax returns are shown only for Class I 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 I will vary from returns shown for Class I.
Western Asset Inflation Indexed Plus Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.25%
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	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.20%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.65%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets		[4]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	0.65%
1 year	rr_ExpenseExampleYear01	489
3 years	rr_ExpenseExampleYear03	624
5 years	rr_ExpenseExampleYear05	771
10 years	rr_ExpenseExampleYear10	1,200
1 year	rr_ExpenseExampleNoRedemptionYear01	489
3 years	rr_ExpenseExampleNoRedemptionYear03	624
5 years	rr_ExpenseExampleNoRedemptionYear05	771
10 years	rr_ExpenseExampleNoRedemptionYear10	1,200
Western Asset Inflation Indexed Plus Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.20%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.40%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets		[4]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.40%
1 year	rr_ExpenseExampleYear01	243
3 years	rr_ExpenseExampleYear03	444
5 years	rr_ExpenseExampleYear05	766
10 years	rr_ExpenseExampleYear10	1,680
1 year	rr_ExpenseExampleNoRedemptionYear01	143
3 years	rr_ExpenseExampleNoRedemptionYear03	444
5 years	rr_ExpenseExampleNoRedemptionYear05	766
10 years	rr_ExpenseExampleNoRedemptionYear10	1,680
Western Asset Inflation Indexed Plus Bond Fund | Class C1
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses	rr_OtherExpensesOverAssets	0.32%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.27%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets		[4]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	1.27%
1 year	rr_ExpenseExampleYear01	129
3 years	rr_ExpenseExampleYear03	402
5 years	rr_ExpenseExampleYear05	696
10 years	rr_ExpenseExampleYear10	1,532
1 year	rr_ExpenseExampleNoRedemptionYear01	129
3 years	rr_ExpenseExampleNoRedemptionYear03	402
5 years	rr_ExpenseExampleNoRedemptionYear05	696
10 years	rr_ExpenseExampleNoRedemptionYear10	1,532
Western Asset Inflation Indexed Plus Bond Fund | Class FI
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[5]
Other expenses	rr_OtherExpensesOverAssets	0.41%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.86%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets	(0.01%)	[4]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	0.85%
1 year	rr_ExpenseExampleYear01	187
3 years	rr_ExpenseExampleYear03	273
5 years	rr_ExpenseExampleYear05	475
10 years	rr_ExpenseExampleYear10	1,059
1 year	rr_ExpenseExampleNoRedemptionYear01	187
3 years	rr_ExpenseExampleNoRedemptionYear03	273
5 years	rr_ExpenseExampleNoRedemptionYear05	475
10 years	rr_ExpenseExampleNoRedemptionYear10	1,059
1 year	rr_AverageAnnualReturnYear01	12.29%	[6]
5 years	rr_AverageAnnualReturnYear05		[6],[7]
10 years	rr_AverageAnnualReturnYear10		[6],[7]
Since inception	rr_AverageAnnualReturnSinceInception	7.58%	[6]
Inception date	rr_AverageAnnualReturnInceptionDate	Jun. 28, 2007	[6]
Western Asset Inflation Indexed Plus Bond Fund | Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.25%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.95%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets		[4]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	0.95%
1 year	rr_ExpenseExampleYear01	97
3 years	rr_ExpenseExampleYear03	303
5 years	rr_ExpenseExampleYear05	526
10 years	rr_ExpenseExampleYear10	1,167
1 year	rr_ExpenseExampleNoRedemptionYear01	97
3 years	rr_ExpenseExampleNoRedemptionYear03	303
5 years	rr_ExpenseExampleNoRedemptionYear05	526
10 years	rr_ExpenseExampleNoRedemptionYear10	1,167
Western Asset Inflation Indexed Plus Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.13%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.33%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets		[4],[7]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	0.33%
1 year	rr_ExpenseExampleYear01	34
3 years	rr_ExpenseExampleYear03	106
5 years	rr_ExpenseExampleYear05	186
10 years	rr_ExpenseExampleYear10	418
1 year	rr_ExpenseExampleNoRedemptionYear01	34
3 years	rr_ExpenseExampleNoRedemptionYear03	106
5 years	rr_ExpenseExampleNoRedemptionYear05	186
10 years	rr_ExpenseExampleNoRedemptionYear10	418
2002	rr_AnnualReturn2002	16.27%
2003	rr_AnnualReturn2003	8.17%
2004	rr_AnnualReturn2004	8.45%
2005	rr_AnnualReturn2005	2.73%
2006	rr_AnnualReturn2006	1.71%
2007	rr_AnnualReturn2007	10.20%
2008	rr_AnnualReturn2008	(4.04%)
2009	rr_AnnualReturn2009	12.86%
2010	rr_AnnualReturn2010	5.67%
2011	rr_AnnualReturn2011	12.81%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2002
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	8.00%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(5.36%)
1 year	rr_AverageAnnualReturnYear01	12.81%
5 years	rr_AverageAnnualReturnYear05	7.30%
10 years	rr_AverageAnnualReturnYear10	7.32%
Western Asset Inflation Indexed Plus Bond Fund | Class IS
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.20%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.07%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.27%
Fees waived and/or expenses reimbursed	rr_FeeWaiverOrReimbursementOverAssets		[4],[7]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses	rr_NetExpensesOverAssets	0.27%
1 year	rr_ExpenseExampleYear01	28
3 years	rr_ExpenseExampleYear03	87
5 years	rr_ExpenseExampleYear05	152
10 years	rr_ExpenseExampleYear10	343
1 year	rr_ExpenseExampleNoRedemptionYear01	28
3 years	rr_ExpenseExampleNoRedemptionYear03	87
5 years	rr_ExpenseExampleNoRedemptionYear05	152
10 years	rr_ExpenseExampleNoRedemptionYear10	343
1 year	rr_AverageAnnualReturnYear01	12.76%	[8]
5 years	rr_AverageAnnualReturnYear05		[7],[8]
10 years	rr_AverageAnnualReturnYear10		[7],[8]
Since inception	rr_AverageAnnualReturnSinceInception	9.95%	[8]
Inception date	rr_AverageAnnualReturnInceptionDate	Dec. 18, 2008	[8]
Western Asset Inflation Indexed Plus Bond Fund | Return after taxes on distributions | Class I
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	11.33%
5 years	rr_AverageAnnualReturnYear05	5.81%
10 years	rr_AverageAnnualReturnYear10	5.50%
Western Asset Inflation Indexed Plus Bond Fund | Return after taxes on distributions and sale of fund shares | Class I
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	8.27%
5 years	rr_AverageAnnualReturnYear05	5.38%
10 years	rr_AverageAnnualReturnYear10	5.25%
Western Asset Inflation Indexed Plus Bond Fund | Barclays Capital U.S. TIPS Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	13.56%
5 years	rr_AverageAnnualReturnYear05	7.95%
10 years	rr_AverageAnnualReturnYear10	7.57%

[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] "Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[4] The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions, taxes, extraordinary expenses and deferred organizational expenses), so that total annual operating expenses are not expected to exceed 0.90%, 1.65%, 1.40%, 0.85% and 1.15% for Class A, C, C1, FI and R shares, respectively. These arrangements cannot be terminated prior to December 31, 2013 without the Board's consent. The manager is permitted to recapture amounts waived or reimbursed to a class within three years after the day on which the manager earned the fee or incurred the expense if the class's total annual operating expenses have fallen to a level below the limit in effect at the time of the waiver or reimbursement and any limit in effect at the time recapture is sought.

[5] The 12b-1 fee shown in the table reflects the amount to which the Board of Directors (the "Board") has currently limited payments under the fund's Class FI Distribution Plan. Pursuant to the Class FI Distribution Plan, the Board may authorize payment of up to 0.40% of average net assets attributable to the fund's Class FI shares without shareholder approval.

[6] For the period June 28, 2007 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. TIPS Index was 8.58%.

[7] N/A

[8] For the period December 18, 2008 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. TIPS Index was 9.25%.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	WESTERN ASSET FUNDS INC
Prospectus Date	rr_ProspectusDate	Oct. 03, 2012
Western Asset Core Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Western Asset Core Bond Fund
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Maximize total return, consistent with prudent investment management and liquidity needs, by investing to obtain the average duration specified below.
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 $100,000 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 29 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 75 under the heading "Sales Charge Waivers and Reductions."
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder 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) (%)
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 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 141% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	141.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in funds sold by Legg Mason Investor Services, LLC ("LMIS"), the fund's distributor.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	100,000
Other Expenses, New Fund, Based on Estimates [Text]	rr_OtherExpensesNewFundBasedOnEstimates	"Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.
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	The fund invests in a portfolio of fixed income securities of various maturities and, under normal market conditions, will invest at least 80% of its net assets in debt and fixed income securities. Although the fund may invest in debt and fixed income securities of any maturity, under normal market conditions the target dollar-weighted average effective duration for the fund is expected to range within 20% of the average duration of the domestic bond market as a whole as estimated by the fund's subadviser (generally, this range is 3–7 years). Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of structural complexities (for example, some bonds can be prepaid by the issuer). The fund presently intends to limit its investments to U.S. dollar denominated securities and currently anticipates that it will generally only purchase debt securities that are rated Baa or BBB or above at the time of purchase by one or more Nationally Recognized Statistical Rating Organizations ("NRSROs") or unrated securities of comparable quality at the time of purchase (as determined by the subadviser). These securities are known as "investment grade securities." The fund may invest up to 25% of its total assets in the securities of non-U.S. issuers. The fund may also enter into various derivative transactions for both hedging and non-hedging purposes, including for purposes of enhancing returns. These derivative transactions include, but are not limited to, futures, options, swaps and forwards. In particular, the fund may use interest rate swaps, credit default swaps (on individual securities and/or baskets of securities), futures contracts and/or mortgage-backed securities to a significant extent, although the amounts invested in these instruments may change from time to time. Other instruments may also be used to a significant extent from time to time.
Risk [Heading]	rr_RiskHeading	Certain 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 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 may also 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. The financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the U.S. is changing many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time. 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 have a higher risk of default and are considered speculative. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness. Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivative instruments themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation are not yet fully known and may not be for some time. New regulation of derivatives may make them more costly, may limit their availability, or may otherwise adversely affect their value or performance. Credit default swap contracts involve special 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. Swaps may be difficult to unwind or terminate. The swap market could be disrupted or limited as a result of recent legislation, and these changes could adversely affect the fund. 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. Liquidity risk. Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss. Foreign securities and emerging market risk. Foreign securities are subject to a number of additional risks, including nationalization or expropriation of assets, imposition of currency controls or restrictions, confiscatory taxation, political or financial instability and other adverse economic or political developments. Lack of information and less market regulation also create increased risk. Risks are greater for investments in emerging markets. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more advanced countries. Low trading volumes may result in a lack of liquidity and in extreme price volatility. 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. 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 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. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. Since changes in interest rates have a greater effect on the prices of longer-term securities, this extension in the securities' effective maturity magnifies the price decline caused by the increase in interest rates. Risk of investing in fewer issuers. To the extent the fund invests its assets in a small number of issuers, the fund will be more susceptible to negative events affecting those issuers. 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. Cash management and defensive investing risk. Money market instruments or short-term debt securities held by the fund for cash management or defensive investing purposes can fluctuate in value. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. In that case the fund would not earn income on the cash and the fund's yield would go down. If a significant amount of the fund's assets are used for cash management or defensive investing purposes, it will be more difficult for the fund to achieve its objective. Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses. Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond. Special risks of mortgage-backed and asset-backed securities. Mortgage-backed securities represent an interest in a pool of mortgages. The rate of mortgage prepayments may lengthen the effective maturity of these securities at a time when their value has declined or shorten the effective maturity of these securities at a time their value has increased. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. Investments in asset-backed securities are subject to similar risks. Portfolio selection risk. The value of your investment may decrease if the portfolio managers' judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect. These and other risks are discussed in more detail later in this Prospectus or in the Statement of Additional Information ("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.
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 I 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. No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus. The returns for Class A, Class C, Class C1 and Class R shares would differ from those of Class I shares to the extent Class A, Class C, Class C1 or Class R shares bear different expenses. The fund makes updated performance information available at the fund's website, http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class), 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.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	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 I 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 One Year or Less [Text]	rr_PerformanceOneYearOrLess	No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-877-721-1926
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class)
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Total returns (before taxes) (%)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Calendar Years ended December 31 Best quarter (06/30/2009): 12.99 Worst quarter (09/30/2008): (5.41)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns (for periods ended December 31, 2011) (%)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	The after-tax returns are shown only for Class I 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	After-tax returns for classes other than Class I will vary from returns shown for Class I.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The after-tax returns are shown only for Class I 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 I will vary from returns shown for Class I.
Western Asset Core Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.25%
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	0.42%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.18%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.85%
1 year	rr_ExpenseExampleYear01	508
3 years	rr_ExpenseExampleYear03	685
5 years	rr_ExpenseExampleYear05	877
10 years	rr_ExpenseExampleYear10	1,430
1 year	rr_ExpenseExampleNoRedemptionYear01	508
3 years	rr_ExpenseExampleNoRedemptionYear03	685
5 years	rr_ExpenseExampleNoRedemptionYear05	877
10 years	rr_ExpenseExampleNoRedemptionYear10	1,430
Western Asset Core Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.42%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.18%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.60%
1 year	rr_ExpenseExampleYear01	263
3 years	rr_ExpenseExampleYear03	505
5 years	rr_ExpenseExampleYear05	871
10 years	rr_ExpenseExampleYear10	1,901
1 year	rr_ExpenseExampleNoRedemptionYear01	163
3 years	rr_ExpenseExampleNoRedemptionYear03	505
5 years	rr_ExpenseExampleNoRedemptionYear05	871
10 years	rr_ExpenseExampleNoRedemptionYear10	1,901
Western Asset Core Bond Fund | Class C1
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.41%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.70%
Other expenses	rr_OtherExpensesOverAssets	0.14%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.25%
1 year	rr_ExpenseExampleYear01	227
3 years	rr_ExpenseExampleYear03	396
5 years	rr_ExpenseExampleYear05	686
10 years	rr_ExpenseExampleYear10	1,511
1 year	rr_ExpenseExampleNoRedemptionYear01	127
3 years	rr_ExpenseExampleNoRedemptionYear03	396
5 years	rr_ExpenseExampleNoRedemptionYear05	686
10 years	rr_ExpenseExampleNoRedemptionYear10	1,511
Western Asset Core Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.42%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.10%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.52%
1 year	rr_ExpenseExampleYear01	53
3 years	rr_ExpenseExampleYear03	167
5 years	rr_ExpenseExampleYear05	291
10 years	rr_ExpenseExampleYear10	652
1 year	rr_ExpenseExampleNoRedemptionYear01	53
3 years	rr_ExpenseExampleNoRedemptionYear03	167
5 years	rr_ExpenseExampleNoRedemptionYear05	291
10 years	rr_ExpenseExampleNoRedemptionYear10	652
2002	rr_AnnualReturn2002	8.74%
2003	rr_AnnualReturn2003	7.82%
2004	rr_AnnualReturn2004	5.29%
2005	rr_AnnualReturn2005	1.91%
2006	rr_AnnualReturn2006	6.24%
2007	rr_AnnualReturn2007	1.73%
2008	rr_AnnualReturn2008	(10.81%)
2009	rr_AnnualReturn2009	23.68%
2010	rr_AnnualReturn2010	12.20%
2011	rr_AnnualReturn2011	7.38%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	12.99%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(5.41%)
1 year	rr_AverageAnnualReturnYear01	7.38%
5 years	rr_AverageAnnualReturnYear05	6.22%
10 years	rr_AverageAnnualReturnYear10	6.10%
Western Asset Core Bond Fund | Class FI
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.42%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[4]
Other expenses	rr_OtherExpensesOverAssets	0.08%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.75%
1 year	rr_ExpenseExampleYear01	77
3 years	rr_ExpenseExampleYear03	240
5 years	rr_ExpenseExampleYear05	417
10 years	rr_ExpenseExampleYear10	930
1 year	rr_ExpenseExampleNoRedemptionYear01	77
3 years	rr_ExpenseExampleNoRedemptionYear03	240
5 years	rr_ExpenseExampleNoRedemptionYear05	417
10 years	rr_ExpenseExampleNoRedemptionYear10	930
1 year	rr_AverageAnnualReturnYear01	7.24%
5 years	rr_AverageAnnualReturnYear05	5.97%
10 years	rr_AverageAnnualReturnYear10	5.82%
Since inception	rr_AverageAnnualReturnSinceInception
Western Asset Core Bond Fund | Class IS
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.42%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.03%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.45%
1 year	rr_ExpenseExampleYear01	46
3 years	rr_ExpenseExampleYear03	144
5 years	rr_ExpenseExampleYear05	252
10 years	rr_ExpenseExampleYear10	567
1 year	rr_ExpenseExampleNoRedemptionYear01	46
3 years	rr_ExpenseExampleNoRedemptionYear03	144
5 years	rr_ExpenseExampleNoRedemptionYear05	252
10 years	rr_ExpenseExampleNoRedemptionYear10	567
1 year	rr_AverageAnnualReturnYear01	7.46%	[5]
5 years	rr_AverageAnnualReturnYear05		[5],[6]
10 years	rr_AverageAnnualReturnYear10		[5],[6]
Since inception	rr_AverageAnnualReturnSinceInception		[5]
Inception date	rr_AverageAnnualReturnInceptionDate	Aug. 29, 2008	[5]
Western Asset Core Bond Fund | Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.42%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.23%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.15%
1 year	rr_ExpenseExampleYear01	117
3 years	rr_ExpenseExampleYear03	365
5 years	rr_ExpenseExampleYear05	632
10 years	rr_ExpenseExampleYear10	1,398
1 year	rr_ExpenseExampleNoRedemptionYear01	117
3 years	rr_ExpenseExampleNoRedemptionYear03	365
5 years	rr_ExpenseExampleNoRedemptionYear05	632
10 years	rr_ExpenseExampleNoRedemptionYear10	1,398
Western Asset Core Bond Fund | Return after taxes on distributions | Class I
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	6.14%
5 years	rr_AverageAnnualReturnYear05	4.34%
10 years	rr_AverageAnnualReturnYear10	4.20%
Western Asset Core Bond Fund | Return after taxes on distributions and sale of fund shares | Class I
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	4.78%
5 years	rr_AverageAnnualReturnYear05	4.17%
10 years	rr_AverageAnnualReturnYear10	4.09%
Western Asset Core Bond Fund | Barclays Capital U.S. Aggregate Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	7.84%
5 years	rr_AverageAnnualReturnYear05	6.50%
10 years	rr_AverageAnnualReturnYear10	5.78%

[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] "Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[4] The 12b-1 fee shown in the table reflects the amount to which the Board of Directors (the "Board") has currently limited payments under the fund's Class FI Distribution Plan. Pursuant to the Class FI Distribution Plan, the Board may authorize payment of up to 0.40% of average net assets attributable to the fund's Class FI shares without shareholder approval.

[5] For the period August 29, 2008 (commencement of operations) to December 31, 2011, the average annual return of the Barclays Capital U.S. Aggregate Index was 7.06%.

[6] N/A

XML

Western Asset Core Bond Fund

Western Asset
Core Bond
Fund

Investment objective

Maximize total return, consistent with prudent investment management and liquidity needs, by investing to obtain the average duration specified below.

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 $100,000 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 29 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 75 under the heading "Sales Charge Waivers and Reductions."

Shareholder fees (paid directly from your investment)

Shareholder Fees Western Asset Core Bond Fund (USD $)		Class A		Class C	Class C1	Class FI	Class R	Class I	Class IS
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)		4.25%		none	none	none	none	none	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)		none	[1]	1.00%	1.00%	none	none	none	none
Small account fee ($)	[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 Western Asset Core Bond Fund	Class A		Class C		Class C1		Class FI		Class R		Class I	Class IS
Management fees	0.42%		0.42%		0.41%		0.42%		0.42%		0.42%	0.42%
Distribution and/or service (12b-1) fees	0.25%		1.00%		0.70%		0.25%	[1]	0.50%		none	none
Other expenses	0.18%	[2]	0.18%	[2]	0.14%	[2]	0.08%		0.23%	[2]	0.10%	0.03%
Total annual fund operating expenses	0.85%		1.60%		1.25%		0.75%		1.15%		0.52%	0.45%

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 Western Asset Core Bond Fund (USD $)	1 year	3 years	5 years	10 years
Class A	508	685	877	1,430
Class C	263	505	871	1,901
Class C1	227	396	686	1,511
Class FI	77	240	417	930
Class R	117	365	632	1,398
Class I	53	167	291	652
Class IS	46	144	252	567

Number of years you own your shares ($)

Expense Example, No Redemption Western Asset Core Bond Fund (USD $)	1 year	3 years	5 years	10 years
Class A	508	685	877	1,430
Class C	163	505	871	1,901
Class C1	127	396	686	1,511
Class FI	77	240	417	930
Class R	117	365	632	1,398
Class I	53	167	291	652
Class IS	46	144	252	567

Portfolio turnover.

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs 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 141% of the average value of its portfolio.

Principal investment strategies

The fund invests in a portfolio of fixed income securities of various maturities and, under normal market conditions, will invest at least 80% of its net assets in debt and fixed income securities. Although the fund may invest in debt and fixed income securities of any maturity, under normal market conditions the target dollar-weighted average effective duration for the fund is expected to range within 20% of the average duration of the domestic bond market as a whole as estimated by the fund's subadviser (generally, this range is 3–7 years). Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of structural complexities (for example, some bonds can be prepaid by the issuer).

The fund presently intends to limit its investments to U.S. dollar denominated securities and currently anticipates that it will generally only purchase debt securities that are rated Baa or BBB or above at the time of purchase by one or more Nationally Recognized Statistical Rating Organizations ("NRSROs") or unrated securities of comparable quality at the time of purchase (as determined by the subadviser). These securities are known as "investment grade securities." The fund may invest up to 25% of its total assets in the securities of non-U.S. issuers.

The fund may also enter into various derivative transactions for both hedging and non-hedging purposes, including for purposes of enhancing returns. These derivative transactions include, but are not limited to, futures, options, swaps and forwards.

In particular, the fund may use interest rate swaps, credit default swaps (on individual securities and/or baskets of securities), futures contracts and/or mortgage-backed securities to a significant extent, although the amounts invested in these instruments may change from time to time. Other instruments may also be used to a significant extent from time to time.

Certain 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 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 may also 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. The financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the U.S. is changing many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time.

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 have a higher risk of default and are considered speculative. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivative instruments themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation are not yet fully known and may not be for some time. New regulation of derivatives may make them more costly, may limit their availability, or may otherwise adversely affect their value or performance.

Credit default swap contracts involve special 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. Swaps may be difficult to unwind or terminate. The swap market could be disrupted or limited as a result of recent legislation, and these changes could adversely affect the fund.

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.

Liquidity risk. Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss.

Foreign securities and emerging market risk. Foreign securities are subject to a number of additional risks, including nationalization or expropriation of assets, imposition of currency controls or restrictions, confiscatory taxation, political or financial instability and other adverse economic or political developments. Lack of information and less market regulation also create increased risk. Risks are greater for investments in emerging markets. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more advanced countries. Low trading volumes may result in a lack of liquidity and in extreme price volatility.

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.

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 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. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. Since changes in interest rates have a greater effect on the prices of longer-term securities, this extension in the securities' effective maturity magnifies the price decline caused by the increase in interest rates.

Risk of investing in fewer issuers. To the extent the fund invests its assets in a small number of issuers, the fund will be more susceptible to negative events affecting those issuers.

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.

Cash management and defensive investing risk. Money market instruments or short-term debt securities held by the fund for cash management or defensive investing purposes can fluctuate in value. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. In that case the fund would not earn income on the cash and the fund's yield would go down. If a significant amount of the fund's assets are used for cash management or defensive investing purposes, it will be more difficult for the fund to achieve its objective.

Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses.

Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond.

Special risks of mortgage-backed and asset-backed securities. Mortgage-backed securities represent an interest in a pool of mortgages. The rate of mortgage prepayments may lengthen the effective maturity of these securities at a time when their value has declined or shorten the effective maturity of these securities at a time their value has increased. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. Investments in asset-backed securities are subject to similar risks.

Portfolio selection risk. The value of your investment may decrease if the portfolio managers' judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect.

These and other risks are discussed in more detail later in this Prospectus or in the Statement of Additional Information ("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 I 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. No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus. The returns for Class A, Class C, Class C1 and Class R shares would differ from those of Class I shares to the extent Class A, Class C, Class C1 or Class R shares bear different expenses. The fund makes updated performance information available at the fund's website, http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class), 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.

Total returns (before taxes) (%)

Calendar Years ended December 31

Best quarter
(06/30/2009): 12.99

Worst quarter
(09/30/2008): (5.41)

Average annual total returns (for periods ended December 31, 2011) (%)

Average Annual Total Returns Western Asset Core Bond Fund		1 year	5 years		10 years		Since inception	Inception date
Class I		7.38%	6.22%		6.10%
Class I Return after taxes on distributions		6.14%	4.34%		4.20%
Class I Return after taxes on distributions and sale of fund shares		4.78%	4.17%		4.09%
Class FI		7.24%	5.97%		5.82%
Class IS	[1]	7.46%		[2]		[2]		Aug. 29, 2008
Barclays Capital U.S. Aggregate Index (reflects no deduction for fees, expenses or taxes)		7.84%	6.50%		5.78%

The after-tax returns are shown only for Class I 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 I will vary from returns shown for Class I.

[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] The 12b-1 fee shown in the table reflects the amount to which the Board of Directors (the "Board") has currently limited payments under the fund's Class FI Distribution Plan. Pursuant to the Class FI Distribution Plan, the Board may authorize payment of up to 0.40% of average net assets attributable to the fund's Class FI shares without shareholder approval.

[2] "Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[1] For the period August 29, 2008 (commencement of operations) to December 31, 2011, the average annual return of the Barclays Capital U.S. Aggregate Index was 7.06%.

[2] N/A

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	WESTERN ASSET FUNDS INC
Prospectus Date	rr_ProspectusDate	Oct. 03, 2012
Western Asset Core Plus Bond Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Western Asset Core Plus Bond Fund
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Maximize total return, consistent with prudent investment management and liquidity needs, by investing to obtain the average duration specified below.
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 $100,000 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 29 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 70 under the heading "Sales Charge Waivers and Reductions."
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder 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) (%)
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 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 170% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	170.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in funds sold by Legg Mason Investor Services, LLC ("LMIS"), the fund's distributor.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	100,000
Other Expenses, New Fund, Based on Estimates [Text]	rr_OtherExpensesNewFundBasedOnEstimates	"Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.
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	The fund invests in a portfolio of fixed income securities of various maturities and, under normal market conditions, will invest at least 80% of its net assets in debt and fixed income securities. Although the fund may invest in securities of any maturity, the fund will normally maintain a dollar-weighted average effective duration within 30% of the average duration of the domestic bond market as a whole as estimated by the fund's subadvisers (generally, this range is 2.5-7 years). Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of structural complexities (for example, some bonds can be prepaid by the issuer). The fund may invest up to 20% of its total assets in non-U.S. dollar denominated securities. Up to 20% of the fund's net assets may be invested in debt securities that are not rated Baa or BBB or above at the time of purchase by one or more Nationally Recognized Statistical Rating Organizations ("NRSROs") or, if unrated, securities of comparable quality at the time of purchase (as determined by the subadvisers). Securities rated Baa or BBB or above by one or more NRSROs or unrated securities of comparable quality are known as "investment grade securities." Securities rated below investment grade are commonly known as "junk bonds" or "high yield securities." The fund may invest up to 25% of its total assets in the securities of non-U.S. issuers. The fund may also enter into various derivative transactions for both hedging and non-hedging purposes, including for purposes of enhancing returns. These derivative transactions include, but are not limited to, futures, options, swaps and forwards. In particular, the fund may use interest rate swaps, credit default swaps (on individual securities and/or baskets of securities), futures contracts and/or mortgage-backed securities to a significant extent, although the amounts invested in these instruments may change from time to time. Other instruments may also be used to a significant extent from time to time.
Risk [Heading]	rr_RiskHeading	Certain 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 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 may also 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. The financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the U.S. is changing many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time. 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. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness. Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivative instruments themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation are not yet fully known and may not be for some time. New regulation of derivatives may make them more costly, may limit their availability, or may otherwise adversely affect their value or performance. Credit default swap contracts involve special 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. Swaps may be difficult to unwind or terminate. The swap market could be disrupted or limited as a result of recent legislation, and these changes could adversely affect the fund. 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. Liquidity risk. Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss. Foreign securities and emerging market risk. Foreign securities are subject to a number of additional risks, including nationalization or expropriation of assets, imposition of currency controls or restrictions, confiscatory taxation, political or financial instability and other adverse economic or political developments. Lack of information and less market regulation also create increased risk. Risks are greater for investments in emerging markets. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more advanced countries. 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 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. 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. 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 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. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. Since changes in interest rates have a greater effect on the prices of longer-term securities, this extension in the securities' effective maturity magnifies the price decline caused by the increase in interest rates. Risk of investing in fewer issuers. To the extent the fund invests its assets in a small number of issuers, the fund will be more susceptible to negative events affecting those issuers. 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. Cash management and defensive investing risk. Money market instruments or short-term debt securities held by the fund for cash management or defensive investing purposes can fluctuate in value. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. In that case the fund would not earn income on the cash and the fund's yield would go down. If a significant amount of the fund's assets are used for cash management or defensive investing purposes, it will be more difficult for the fund to achieve its objective. Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses. Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond. Special risks of mortgage-backed and asset-backed securities. Mortgage-backed securities represent an interest in a pool of mortgages. The rate of mortgage prepayments may lengthen the effective maturity of these securities at a time when their value has declined or shorten the effective maturity of these securities at a time their value has increased. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. Investments in asset-backed securities are subject to similar risks. Portfolio selection risk. The value of your investment may decrease if the portfolio managers' judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect. These and other risks are discussed in more detail later in this Prospectus or in the Statement of Additional Information ("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.
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 I 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. No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus. The returns for Class A, Class C, Class C1 and Class R shares would differ from those of Class I shares to the extent Class A, Class C, Class C1 or Class R shares bear different expenses. The fund makes updated performance information available at the fund's website, http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class), 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.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	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 I 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 One Year or Less [Text]	rr_PerformanceOneYearOrLess	No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-877-721-1926
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class)
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Total returns (before taxes) (%)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Calendar Years ended December 31 Best quarter (06/30/2009): 11.18 Worst quarter (12/31/2008): (3.73)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns (for periods ended December 31, 2011) (%)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	The after-tax returns are shown only for Class I 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	After-tax returns for classes other than Class I will vary from returns shown for Class I.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The after-tax returns are shown only for Class I 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 I will vary from returns shown for Class I.
Western Asset Core Plus Bond Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.25%
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	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.18%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.83%
1 year	rr_ExpenseExampleYear01	506
3 years	rr_ExpenseExampleYear03	679
5 years	rr_ExpenseExampleYear05	867
10 years	rr_ExpenseExampleYear10	1,408
1 year	rr_ExpenseExampleNoRedemptionYear01	506
3 years	rr_ExpenseExampleNoRedemptionYear03	679
5 years	rr_ExpenseExampleNoRedemptionYear05	867
10 years	rr_ExpenseExampleNoRedemptionYear10	1,408
Western Asset Core Plus Bond Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.18%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.58%
1 year	rr_ExpenseExampleYear01	261
3 years	rr_ExpenseExampleYear03	499
5 years	rr_ExpenseExampleYear05	861
10 years	rr_ExpenseExampleYear10	1,879
1 year	rr_ExpenseExampleNoRedemptionYear01	161
3 years	rr_ExpenseExampleNoRedemptionYear03	499
5 years	rr_ExpenseExampleNoRedemptionYear05	861
10 years	rr_ExpenseExampleNoRedemptionYear10	1,879
Western Asset Core Plus Bond Fund | Class C1
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Small account fee ($)	rr_MaximumAccountFee	15	[2]
Management fees	rr_ManagementFeesOverAssets	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.70%
Other expenses	rr_OtherExpensesOverAssets	0.14%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.24%
1 year	rr_ExpenseExampleYear01	226
3 years	rr_ExpenseExampleYear03	393
5 years	rr_ExpenseExampleYear05	680
10 years	rr_ExpenseExampleYear10	1,500
1 year	rr_ExpenseExampleNoRedemptionYear01	126
3 years	rr_ExpenseExampleNoRedemptionYear03	393
5 years	rr_ExpenseExampleNoRedemptionYear05	680
10 years	rr_ExpenseExampleNoRedemptionYear10	1,500
Western Asset Core Plus Bond Fund | Class FI
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[4]
Other expenses	rr_OtherExpensesOverAssets	0.13%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.78%
1 year	rr_ExpenseExampleYear01	80
3 years	rr_ExpenseExampleYear03	250
5 years	rr_ExpenseExampleYear05	434
10 years	rr_ExpenseExampleYear10	967
1 year	rr_ExpenseExampleNoRedemptionYear01	80
3 years	rr_ExpenseExampleNoRedemptionYear03	250
5 years	rr_ExpenseExampleNoRedemptionYear05	434
10 years	rr_ExpenseExampleNoRedemptionYear10	967
1 year	rr_AverageAnnualReturnYear01	6.37%	[5]
5 years	rr_AverageAnnualReturnYear05	6.61%	[5]
10 years	rr_AverageAnnualReturnYear10		[5],[6]
Since Inception	rr_AverageAnnualReturnSinceInception	6.57%	[5]
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 08, 2002	[5]
Western Asset Core Plus Bond Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.05%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.45%
1 year	rr_ExpenseExampleYear01	46
3 years	rr_ExpenseExampleYear03	144
5 years	rr_ExpenseExampleYear05	252
10 years	rr_ExpenseExampleYear10	567
1 year	rr_ExpenseExampleNoRedemptionYear01	46
3 years	rr_ExpenseExampleNoRedemptionYear03	144
5 years	rr_ExpenseExampleNoRedemptionYear05	252
10 years	rr_ExpenseExampleNoRedemptionYear10	567
2002	rr_AnnualReturn2002	8.68%
2003	rr_AnnualReturn2003	9.48%
2004	rr_AnnualReturn2004	7.54%
2005	rr_AnnualReturn2005	2.24%
2006	rr_AnnualReturn2006	6.81%
2007	rr_AnnualReturn2007	2.57%
2008	rr_AnnualReturn2008	(9.78%)
2009	rr_AnnualReturn2009	26.20%
2010	rr_AnnualReturn2010	11.97%
2011	rr_AnnualReturn2011	6.72%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	11.18%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.73%)
1 year	rr_AverageAnnualReturnYear01	6.72%
5 years	rr_AverageAnnualReturnYear05	6.90%
10 years	rr_AverageAnnualReturnYear10	6.91%
Western Asset Core Plus Bond Fund | Class IS
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.03%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.43%
1 year	rr_ExpenseExampleYear01	44
3 years	rr_ExpenseExampleYear03	138
5 years	rr_ExpenseExampleYear05	241
10 years	rr_ExpenseExampleYear10	543
1 year	rr_ExpenseExampleNoRedemptionYear01	44
3 years	rr_ExpenseExampleNoRedemptionYear03	138
5 years	rr_ExpenseExampleNoRedemptionYear05	241
10 years	rr_ExpenseExampleNoRedemptionYear10	543
1 year	rr_AverageAnnualReturnYear01	6.65%	[7]
5 years	rr_AverageAnnualReturnYear05		[6],[7]
10 years	rr_AverageAnnualReturnYear10		[6],[7]
Since Inception	rr_AverageAnnualReturnSinceInception	11.27%	[7]
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 04, 2008	[7]
Western Asset Core Plus Bond Fund | Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)	rr_MaximumDeferredSalesChargeOverOther	none
Small account fee ($)	rr_MaximumAccountFee	none	[2]
Management fees	rr_ManagementFeesOverAssets	0.40%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.23%	[3]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.13%
1 year	rr_ExpenseExampleYear01	115
3 years	rr_ExpenseExampleYear03	359
5 years	rr_ExpenseExampleYear05	622
10 years	rr_ExpenseExampleYear10	1,374
1 year	rr_ExpenseExampleNoRedemptionYear01	115
3 years	rr_ExpenseExampleNoRedemptionYear03	359
5 years	rr_ExpenseExampleNoRedemptionYear05	622
10 years	rr_ExpenseExampleNoRedemptionYear10	1,374
Western Asset Core Plus Bond Fund | Return after taxes on distributions | Class I
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	5.43%
5 years	rr_AverageAnnualReturnYear05	4.83%
10 years	rr_AverageAnnualReturnYear10	4.86%
Western Asset Core Plus Bond Fund | Return after taxes on distributions and sale of fund shares | Class I
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	4.34%
5 years	rr_AverageAnnualReturnYear05	4.64%
10 years	rr_AverageAnnualReturnYear10	4.71%
Western Asset Core Plus Bond Fund | Barclays Capital U.S. Aggregate Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 year	rr_AverageAnnualReturnYear01	7.84%
5 years	rr_AverageAnnualReturnYear05	6.50%
10 years	rr_AverageAnnualReturnYear10	5.78%

[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] "Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[4] The 12b-1 fee shown in the table reflects the amount to which the Board of Directors (the "Board") has currently limited payments under the fund's Class FI Distribution Plan. Pursuant to the Class FI Distribution Plan, the Board may authorize payment of up to 0.40% of average net assets attributable to the fund's Class FI shares without shareholder approval.

[5] For the period January 8, 2002 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. Aggregate Index was 5.76%.

[6] N/A

[7] For the period August 4, 2008 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. Aggregate Index was 7.23%.

XML

Document and Entity Information	12 Months Ended
	Oct. 03, 2012
Risk/Return:
Document Type	Other
Document Period End Date	Dec. 31, 2011
Registrant Name	WESTERN ASSET FUNDS INC
Central Index Key	0000863520
Amendment Flag	false
Document Creation Date	Sep. 28, 2012
Document Effective Date	Sep. 28, 2012
Prospectus Date	Oct. 03, 2012

XML

Western Asset Inflation Indexed Plus Bond Fund

Western Asset
Inflation Indexed
Plus Bond
Fund

Investment objective

Maximize total return, consistent with preservation of capital.

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 $100,000 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 30 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 70 under the heading "Sales Charge Waivers and Reductions."

Shareholder fees (paid directly from your investment)

Shareholder Fees Western Asset Inflation Indexed Plus Bond Fund (USD $)		Class A		Class C	Class C1	Class FI	Class R	Class I	Class IS
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)		4.25%		none	none	none	none	none	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)		none	[1]	1.00%	none	none	none	none	none
Small account fee ($)	[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 Western Asset Inflation Indexed Plus Bond Fund		Class A		Class C		Class C1		Class FI		Class R		Class I		Class IS
Management fees		0.20%		0.20%		0.20%		0.20%		0.20%		0.20%		0.20%
Distribution and/or service (12b-1) fees		0.25%		1.00%		0.75%		0.25%	[1]	0.50%		none		none
Other expenses		0.20%	[2]	0.20%	[2]	0.32%	[2]	0.41%		0.25%	[2]	0.13%		0.07%
Total annual fund operating expenses		0.65%		1.40%		1.27%		0.86%		0.95%		0.33%		0.27%
Fees waived and/or expenses reimbursed	[3]							(0.01%)					[4]		[4]
Total annual fund operating expenses after waiving fees and/or reimbursing expenses		0.65%		1.40%		1.27%		0.85%		0.95%		0.33%		0.27%

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 Western Asset Inflation Indexed Plus Bond Fund (USD $)	1 year	3 years	5 years	10 years
Class A	489	624	771	1,200
Class C	243	444	766	1,680
Class C1	129	402	696	1,532
Class FI	187	273	475	1,059
Class R	97	303	526	1,167
Class I	34	106	186	418
Class IS	28	87	152	343

Number of years you own your shares ($)

Expense Example, No Redemption Western Asset Inflation Indexed Plus Bond Fund (USD $)	1 year	3 years	5 years	10 years
CLASS A	489	624	771	1,200
CLASS C	143	444	766	1,680
Class C1	129	402	696	1,532
Class FI	187	273	475	1,059
CLASS R	97	303	526	1,167
Class I	34	106	186	418
Class IS	28	87	152	343

Portfolio Turnover.

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs 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 50% of the average value of its portfolio.

Principal investment strategies

Under normal market conditions, the fund 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.

The subadvisers use fundamental investment techniques to select issues. Although the fund may invest in securities of any maturity, the fund will normally maintain a dollar-weighted average effective duration, as estimated by the fund's subadvisers, within 3 years of that of its benchmark, the Barclays Capital U.S. TIPS Index. Therefore, the range within which the dollar-weighted average effective duration of the fund is expected to fluctuate is 6–12 years, although this may vary. Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of structural complexities (for example, some bonds can be prepaid by the issuer).

The fund intends to sell protection in connection with credit default swaps relating to corporate debt securities. It is currently expected that the notional amount of the credit default swaps will not exceed 40% of the fund's net assets, although such exposure may exceed 40% from time to time.

The fund is expected to maintain a dollar-weighted average credit quality of at least A/A.

In addition, under normal market conditions, at the time of purchase:

•      no more than 20% of the fund's net assets may be invested in non-U.S. dollar denominated inflation-indexed securities

•      no more than 10% of the fund's net assets may be invested in un-hedged non-U.S. dollar denominated securities

•      no more than 20% of the fund's net assets may be invested in a combination of securities rated below investment grade, emerging market securities and loan participations and assignments

•      no more than 10% of the fund's net assets may be invested in securities rated below investment grade

•      no more than 10% of the fund's net assets may be invested in emerging market securities

•      no more than 10% of the fund's net assets may be invested in loan participations and assignments

The fund considers a security to be rated below investment grade if it is not rated Baa/BBB or above by at least one Nationally Recognized Statistical Rating Organization ("NRSRO") or is unrated and of comparable quality as determined by the subadvisers. Securities rated below investment grade are commonly known as "junk bonds" or "high yield securities."

The fund may also enter into various derivative transactions for both hedging and non-hedging purposes, including for purposes of enhancing returns. These derivative transactions include, but are not limited to, futures, options, swaps and forwards.

In particular, the fund may use interest rate swaps, credit default swaps (on individual securities and/or baskets of securities), futures contracts and/or mortgage-backed securities to a significant extent, although the amounts invested in these instruments may change from time to time. Other instruments may also be used to a significant extent from time to time.

Certain 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 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 may also 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. The financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the U.S. is changing many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time.

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 have a higher risk of default and are considered speculative. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivative instruments themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation are not yet fully known and may not be for some time. New regulation of derivatives may make them more costly, may limit their availability, or may otherwise adversely affect their value or performance.

Credit default swap contracts involve special 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. Swaps may be difficult to unwind or terminate. The swap market could be disrupted or limited as a result of recent legislation, and these changes could adversely affect the fund.

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.

Liquidity risk. Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss.

Foreign securities and emerging market risk. Foreign securities are subject to a number of additional risks, including nationalization or expropriation of assets, imposition of currency controls or restrictions, confiscatory taxation, political or financial instability and other adverse economic or political developments. Lack of information and less market regulation also create increased risk. Risks are greater for investments in emerging markets. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more advanced countries. 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 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.

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.

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 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. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. Since changes in interest rates have a greater effect on the prices of longer-term securities, this extension in the securities' effective maturity magnifies the price decline caused by the increase in interest rates.

Risk of investing in fewer issuers. To the extent the fund invests its assets in a small number of issuers, the fund will be more susceptible to negative events affecting those issuers.

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.

Cash management and defensive investing risk. Money market instruments or short-term debt securities held by the fund for cash management or defensive investing purposes can fluctuate in value. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. In that case the fund would not earn income on the cash and the fund's yield would go down. If a significant amount of the fund's assets are used for cash management or defensive investing purposes, it will be more difficult for the fund to achieve its objective.

Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses.

Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond.

Special risks of mortgage-backed and asset-backed securities. Mortgage-backed securities represent an interest in a pool of mortgages. The rate of mortgage prepayments may lengthen the effective maturity of these securities at a time when their value has declined or shorten the effective maturity of these securities at a time their value has increased. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. Investments in asset-backed securities are subject to similar risks.

Portfolio selection risk. The value of your investment may decrease if the portfolio managers' judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect.

These and other risks are discussed in more detail later in this Prospectus or in the Statement of Additional Information ("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 I 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. No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus. The returns for Class A, Class C, Class C1 and Class R shares would differ from those of Class I shares to the extent Class A, Class C, Class C1 or Class R shares bear different expenses. The fund makes updated performance information available at the fund's website, http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class), 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.

Total returns (before taxes) (%)

Calendar Years ended December 31

Best quarter
(09/30/2002): 8.00

Worst quarter
(09/30/2008): (5.36)

Average annual total returns (for periods ended December 31, 2011) (%)

Average Annual Total Returns Western Asset Inflation Indexed Plus Bond Fund		1 year	5 years		10 years		Since inception	Inception date
Class I		12.81%	7.30%		7.32%
Class I Return after taxes on distributions		11.33%	5.81%		5.50%
Class I Return after taxes on distributions and sale of fund shares		8.27%	5.38%		5.25%
Class FI	[1]	12.29%		[2]		[2]	7.58%	Jun. 28, 2007
Class IS	[3]	12.76%		[2]		[2]	9.95%	Dec. 18, 2008
Barclays Capital U.S. TIPS Index (reflects no deduction for fees, expenses or taxes)		13.56%	7.95%		7.57%

The after-tax returns are shown only for Class I 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 I will vary from returns shown for Class I.

[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] The 12b-1 fee shown in the table reflects the amount to which the Board of Directors (the "Board") has currently limited payments under the fund's Class FI Distribution Plan. Pursuant to the Class FI Distribution Plan, the Board may authorize payment of up to 0.40% of average net assets attributable to the fund's Class FI shares without shareholder approval.

[2] "Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[3] The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions, taxes, extraordinary expenses and deferred organizational expenses), so that total annual operating expenses are not expected to exceed 0.90%, 1.65%, 1.40%, 0.85% and 1.15% for Class A, C, C1, FI and R shares, respectively. These arrangements cannot be terminated prior to December 31, 2013 without the Board's consent. The manager is permitted to recapture amounts waived or reimbursed to a class within three years after the day on which the manager earned the fee or incurred the expense if the class's total annual operating expenses have fallen to a level below the limit in effect at the time of the waiver or reimbursement and any limit in effect at the time recapture is sought.

[4] N/A

[1] For the period June 28, 2007 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. TIPS Index was 8.58%.

[2] N/A

[3] For the period December 18, 2008 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. TIPS Index was 9.25%.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	WESTERN ASSET FUNDS INC
Prospectus Date	rr_ProspectusDate	Oct. 03, 2012
Document Creation Date	dei_DocumentCreationDate	Sep. 28, 2012

XML

Western Asset Core Plus Bond Fund

Western Asset
Core Plus
Bond Fund

Investment objective

Maximize total return, consistent with prudent investment management and liquidity needs, by investing to obtain the average duration specified below.

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 $100,000 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 29 under the heading "Sales charges" and in the fund's statement of additional information ("SAI") on page 70 under the heading "Sales Charge Waivers and Reductions."

Shareholder fees (paid directly from your investment)

Shareholder Fees Western Asset Core Plus Bond Fund (USD $)		Class A		Class C	Class C1	Class FI	Class R	Class I	Class IS
Maximum sales charge (load) imposed on purchases (as a % of offering price) (%)		4.25%		none	none	none	none	none	none
Maximum deferred sales charge (load) (as a % of the lower of net asset value at purchase or redemption) (may be reduced over time) (%)		none	[1]	1.00%	1.00%	none	none	none	none
Small account fee ($)	[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 Western Asset Core Plus Bond Fund	Class A		Class C		Class C1		Class FI		Class R		Class I	Class IS
Management fees	0.40%		0.40%		0.40%		0.40%		0.40%		0.40%	0.40%
Distribution and/or service (12b-1) fees	0.25%		1.00%		0.70%		0.25%	[1]	0.50%		none	none
Other expenses	0.18%	[2]	0.18%	[2]	0.14%	[2]	0.13%		0.23%	[2]	0.05%	0.03%
Total annual fund operating expenses	0.83%		1.58%		1.24%		0.78%		1.13%		0.45%	0.43%

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 Western Asset Core Plus Bond Fund (USD $)	1 year	3 years	5 years	10 years
Class A	506	679	867	1,408
Class C	261	499	861	1,879
Class C1	226	393	680	1,500
Class FI	80	250	434	967
Class R	115	359	622	1,374
Class I	46	144	252	567
Class IS	44	138	241	543

Number of years you own your shares ($)

Expense Example, No Redemption Western Asset Core Plus Bond Fund (USD $)	1 year	3 years	5 years	10 years
Class A	506	679	867	1,408
Class C	161	499	861	1,879
Class C1	126	393	680	1,500
Class FI	80	250	434	967
Class R	115	359	622	1,374
Class I	46	144	252	567
Class IS	44	138	241	543

Portfolio turnover.

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs 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 170% of the average value of its portfolio.

Principal investment strategies

The fund invests in a portfolio of fixed income securities of various maturities and, under normal market conditions, will invest at least 80% of its net assets in debt and fixed income securities. Although the fund may invest in securities of any maturity, the fund will normally maintain a dollar-weighted average effective duration within 30% of the average duration of the domestic bond market as a whole as estimated by the fund's subadvisers (generally, this range is 2.5-7 years). Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of structural complexities (for example, some bonds can be prepaid by the issuer).

The fund may invest up to 20% of its total assets in non-U.S. dollar denominated securities. Up to 20% of the fund's net assets may be invested in debt securities that are not rated Baa or BBB or above at the time of purchase by one or more Nationally Recognized Statistical Rating Organizations ("NRSROs") or, if unrated, securities of comparable quality at the time of purchase (as determined by the subadvisers). Securities rated Baa or BBB or above by one or more NRSROs or unrated securities of comparable quality are known as "investment grade securities." Securities rated below investment grade are commonly known as "junk bonds" or "high yield securities." The fund may invest up to 25% of its total assets in the securities of non-U.S. issuers.

The fund may also enter into various derivative transactions for both hedging and non-hedging purposes, including for purposes of enhancing returns. These derivative transactions include, but are not limited to, futures, options, swaps and forwards.

In particular, the fund may use interest rate swaps, credit default swaps (on individual securities and/or baskets of securities), futures contracts and/or mortgage-backed securities to a significant extent, although the amounts invested in these instruments may change from time to time. Other instruments may also be used to a significant extent from time to time.

Certain 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 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 may also 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. The financial crisis that began in 2008 has caused a significant decline in the value and liquidity of many securities. In response to the crisis, the U.S. and other governments and the Federal Reserve and certain foreign central banks have taken steps to support financial markets. The withdrawal of this support could also negatively affect the value and liquidity of certain securities. In addition, legislation recently enacted in the U.S. is changing many aspects of financial regulation. The impact of the legislation on the markets, and the practical implications for market participants, may not be fully known for some time.

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. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates or the derivative instruments themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation are not yet fully known and may not be for some time. New regulation of derivatives may make them more costly, may limit their availability, or may otherwise adversely affect their value or performance.

Credit default swap contracts involve special 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. Swaps may be difficult to unwind or terminate. The swap market could be disrupted or limited as a result of recent legislation, and these changes could adversely affect the fund.

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.

Liquidity risk. Some securities held by the fund may be difficult to sell, or illiquid, particularly during times of market turmoil. Illiquid securities may also be difficult to value. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss.

Foreign securities and emerging market risk. Foreign securities are subject to a number of additional risks, including nationalization or expropriation of assets, imposition of currency controls or restrictions, confiscatory taxation, political or financial instability and other adverse economic or political developments. Lack of information and less market regulation also create increased risk. Risks are greater for investments in emerging markets. Emerging market countries tend to have economic, political and legal systems that are less fully developed and are less stable than those of more advanced countries. 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 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.

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.

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 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. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. Since changes in interest rates have a greater effect on the prices of longer-term securities, this extension in the securities' effective maturity magnifies the price decline caused by the increase in interest rates.

Risk of investing in fewer issuers. To the extent the fund invests its assets in a small number of issuers, the fund will be more susceptible to negative events affecting those issuers.

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.

Cash management and defensive investing risk. Money market instruments or short-term debt securities held by the fund for cash management or defensive investing purposes can fluctuate in value. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. In that case the fund would not earn income on the cash and the fund's yield would go down. If a significant amount of the fund's assets are used for cash management or defensive investing purposes, it will be more difficult for the fund to achieve its objective.

Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses.

Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond.

Special risks of mortgage-backed and asset-backed securities. Mortgage-backed securities represent an interest in a pool of mortgages. The rate of mortgage prepayments may lengthen the effective maturity of these securities at a time when their value has declined or shorten the effective maturity of these securities at a time their value has increased. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. Investments in asset-backed securities are subject to similar risks.

Portfolio selection risk. The value of your investment may decrease if the portfolio managers' judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect.

These and other risks are discussed in more detail later in this Prospectus or in the Statement of Additional Information ("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 I 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. No performance information is presented for Class A, Class C, Class C1 or Class R shares because these share classes have not yet commenced operations as of the date of this Prospectus. The returns for Class A, Class C, Class C1 and Class R shares would differ from those of Class I shares to the extent Class A, Class C, Class C1 or Class R shares bear different expenses. The fund makes updated performance information available at the fund's website, http://www.leggmason.com/individualinvestors/products/mutual-funds/annualized_performance (select share class), 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.

Total returns (before taxes) (%)

Calendar Years ended December 31

Best quarter
(06/30/2009): 11.18

Worst quarter
(12/31/2008): (3.73)

Average annual total returns (for periods ended December 31, 2011) (%)

Average Annual Total Returns Western Asset Core Plus Bond Fund		1 year	5 years		10 years		Since inception	Inception date
Class I		6.72%	6.90%		6.91%
Class I Return after taxes on distributions		5.43%	4.83%		4.86%
Class I Return after taxes on distributions and sale of fund shares		4.34%	4.64%		4.71%
Class FI	[1]	6.37%	6.61%			[2]	6.57%	Jan. 08, 2002
Class IS	[3]	6.65%		[2]		[2]	11.27%	Aug. 04, 2008
Barclays Capital U.S. Aggregate Index (reflects no deduction for fees, expenses or taxes)		7.84%	6.50%		5.78%

The after-tax returns are shown only for Class I 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 I will vary from returns shown for Class I.

[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] The 12b-1 fee shown in the table reflects the amount to which the Board of Directors (the "Board") has currently limited payments under the fund's Class FI Distribution Plan. Pursuant to the Class FI Distribution Plan, the Board may authorize payment of up to 0.40% of average net assets attributable to the fund's Class FI shares without shareholder approval.

[2] "Other expenses" for Class A, Class C, Class C1 and Class R shares are estimated for the current fiscal year. Actual expenses may differ from estimates.

[1] For the period January 8, 2002 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. Aggregate Index was 5.76%.

[2] N/A

[3] For the period August 4, 2008 (commencement of operations) to December 31, 2011, the average annual return for the Barclays Capital U.S. Aggregate Index was 7.23%.