v3.25.4
Shareholder Report
12 Months Ended
Dec. 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSR/A
Amendment Flag false
Registrant Name Legg Mason Global Asset Management Trust
Entity Central Index Key 0001474103
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2025
Shareholder Report Annual or Semi-Annual annual shareholder report
Class A  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class A
Trading Symbol GOBAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class A
$101
0.95%
[1]
Expenses Paid, Amount $ 101
Expense Ratio, Percent 0.95%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class A shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 13.17%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class A
13.17
-2.86
1.62
Class A (with sales charge)
8.91
-3.70
1.18
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[2]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class C
Trading Symbol LGOCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class C
$181
1.71%
[3]
Expenses Paid, Amount $ 181
Expense Ratio, Percent 1.71%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class C shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 12.23%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class C
12.23
-3.54
0.91
Class C (with sales charge)
11.23
-3.54
0.91
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[4]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C1  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class C1
Trading Symbol GOBCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class C1
$154
1.45%
[5]
Expenses Paid, Amount $ 154
Expense Ratio, Percent 1.45%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class C1 shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 12.65%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class C1
12.65
-2.81
1.45
Class C1 (with sales charge)
11.65
-2.81
1.45
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[6]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class FI  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class FI
Trading Symbol GOBFX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class FI
$107
1.00%
[7]
Expenses Paid, Amount $ 107
Expense Ratio, Percent 1.00%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class FI shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 13.10%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class FI
13.10
-2.86
1.63
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[8]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class R
Trading Symbol LBORX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class R
$133
1.25%
[9]
Expenses Paid, Amount $ 133
Expense Ratio, Percent 1.25%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class R shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 12.75%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class R
12.75
-3.12
1.35
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[10]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class I  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class I
Trading Symbol GOBIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class I
$70
0.66%
[11]
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.66%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class I shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 13.51%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class I
13.51
-2.56
1.94
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[12]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class IS  
Shareholder Report [Line Items]  
Fund Name BrandywineGLOBAL - Global Opportunities Bond Fund
Class Name Class IS
Trading Symbol GOBSX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about BrandywineGLOBAL - Global Opportunities Bond Fund for the period January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at 877-6LM-FUND/656-3863.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 877-6LM-FUND/656-3863
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST YEAR? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Class IS
$59
0.55%
[13]
Expenses Paid, Amount $ 59
Expense Ratio, Percent 0.55%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended December 31, 2025, Class IS shares of BrandywineGLOBAL - Global Opportunities Bond Fund returned 13.60%. The Fund compares its performance to the  FTSE World Government Bond Index, which returned 7.55% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
The euro was the largest contributor to performance, supported by improving European growth expectations and sentiment. Strong relative demand amid a weakening U.S. dollar drove gains in the first half of 2025, reinforced by continued euro area disinflation that reduced macro uncertainty and supported European risk assets and the currency.
Local-currency Mexican bonds also contributed to performance, supported by elevated real yields and strong investor demand for higher-yielding assets during periods of contained volatility and improved risk appetite. Banxico delivered multiple rate cuts in 2025 as inflation moderated, allowing policy to become incrementally less restrictive.
U.S. Treasury duration was additive, as the Fund tactically increased exposure when yields approached 5% and growth momentum and policy expectations began to shift. Signs of a softening labor market pushed yields lower as investors priced in additional rate cuts, helping offset the fiscal and tariff-related uncertainties that weighed on markets in the first half of the year.
Top detractors from performance:
The Japanese yen was the largest detractor, weighed down by persistent yield differentials and its continued role as a funding currency for global carry trades during risk-on periods. Although the Bank of Japan raised its policy rate to the highest level in 30 years, cautious guidance on the future pace of hikes limited support for the currency.
The South Korean won was a moderate detractor, reflecting a challenging mix of domestic political uncertainty, sensitivity to global trade conditions, and an unfavorable relative-rate backdrop at key points during the year. Political developments in particular weighed on sentiment.
Use of derivatives and the impact on performance:
The Fund utilized currency forwards for hedging and alpha purposes, which contributed to performance. Bond futures were used as a duration management, hedging, and alpha source, which detracted from period.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended December 31, 2025
 
1 Year
5 Year
10 Year
Class IS
13.60
-2.45
2.05
Bloomberg Global Aggregate Index
8.17
-2.15
1.26
FTSE World Government Bond Index
7.55
-3.53
0.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jan. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at 877-6LM-FUND/656-3863 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,161,821,095
Holdings Count | $ / shares 35
Advisory Fees Paid, Amount $ 6,491,276
Investment Company Portfolio Turnover 235.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Total Net Assets
$1,161,821,095
Total Number of Portfolio Holdings (excludes derivatives, except purchased options, if any)
35
Total Management Fee Paid
$6,491,276
Portfolio Turnover Rate
235%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[14]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective 12/31/2025, David F. Hoffman, CFA stepped down as a member of the portfolio management team. Effective 7/31/2025, Paul Mielczarski joined the team.
This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Summary of Change Legend [Text Block] This is a summary of a change and a planned change to the Fund since 1/1/2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by 5/1/2026, at https://www.franklintempleton.com/regulatory-fund-documents or upon request at 877-6LM-FUND/656-3863 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number 877-6LM-FUND/656-3863
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[2]
* Does not include derivatives, except purchased options, if any.  
[3]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[4]
* Does not include derivatives, except purchased options, if any.  
[5]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[6]
* Does not include derivatives, except purchased options, if any.  
[7]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[8]
* Does not include derivatives, except purchased options, if any.  
[9]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[10]
* Does not include derivatives, except purchased options, if any.  
[11]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[12]
* Does not include derivatives, except purchased options, if any.  
[13]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[14]
* Does not include derivatives, except purchased options, if any.