| Form N-CSR Cover | 12 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Legg Mason Partners Investment Trust |
| Entity Central Index Key | 0000880366 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 12 Months Ended | |
| Oct. 31, 2024 USD ($) $ / shares | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Legg Mason Partners Investment Trust | |
| Entity Central Index Key | 0000880366 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Oct. 31, 2024 | |
| Class A | ||
| Shareholder Report [Line Items] | ||
| Fund Name | ClearBridge Sustainability Leaders Fund | |
| Class Name | Class A | |
| Trading Symbol | CLSUX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about ClearBridge Sustainability Leaders Fund for the period November 1, 2023, to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| 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 . | |
| 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 $132 1.15% | [1] |
| Expenses Paid, Amount | $ 132 | |
| Expense Ratio, Percent | 1.15% | |
| Factors Affecting Performance [Text Block] | HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended October 31, 2024, Class A shares of ClearBridge Sustainability Leaders Fund returned 28.89%. The Fund compares its performance to the Russell 3000 Index, which returned 37.86% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Microsoft, a software and technology company, continued to be supported by strong execution and its leadership position in generative AI, which drove a positive inflection for growth of its cloud platform Azure and adoption of its Copilot offering. ↑ JPMorgan Chase, a financial services company, performed well on the improved economic outlook and rebounding capital markets, which were supportive of its corporate and investment banking. ↑ Apple, a consumer electronics, software, services and technology company, rose as investors saw potential for a strong iPhone upgrade cycle given substantial demand during COVID. Top detractors from performance: ↓ Shoals Technologies Group, a provider of electrical balance of system solutions for utility-scale solar energy projects within the industrials sector, was lower as sustained higher interest rates resulting in project delays led to lower-than-expected revenues and weaker guidance from the company for 2024 revenues. ↓ LKQ, a wholesale distributor of alternative parts for the auto aftermarket in North America and Europe, was down amid weaker North American sales growth, partly due to warmer weather keeping more vehicles on the road as well as repair cost inflation from higher interest rates. ↓ Enphase Energy, manufacturer of microinverters for residential and small commercial solar PV systems, declined as higher interest rates continued to weigh on renewables stocks. | |
| 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] | ||
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended October 31, 2024 1 Year 5 Year Since Inception (11/2/2015) Class A 28.89 12.88 12.27 Class A (with sales charge) 21.78 11.56 11.53 Russell 3000 Index 37.86 14.60 13.19 | |
| 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. | |
| 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 | $ 116,835,521 | |
| Holdings Count | $ / shares | 52 | [2] |
| Advisory Fees Paid, Amount | $ 629,820 | |
| Investment Company Portfolio Turnover | 47% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of October 31, 2024) Total Net Assets $116,835,521 Total Number of Portfolio Holdings * 52 Total Management Fee Paid $629,820 Portfolio Turnover Rate 47% | [2] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class C | ||
| Shareholder Report [Line Items] | ||
| Fund Name | ClearBridge Sustainability Leaders Fund | |
| Class Name | Class C | |
| Trading Symbol | CAABX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about ClearBridge Sustainability Leaders Fund for the period November 1, 2023, to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| 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 . | |
| 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 $215 1.89% | [3] |
| Expenses Paid, Amount | $ 215 | |
| Expense Ratio, Percent | 1.89% | |
| Factors Affecting Performance [Text Block] | HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended October 31, 2024, Class C shares of ClearBridge Sustainability Leaders Fund returned 27.93%. The Fund compares its performance to the Russell 3000 Index, which returned 37.86% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Microsoft, a software and technology company, continued to be supported by strong execution and its leadership position in generative AI, which drove a positive inflection for growth of its cloud platform Azure and adoption of its Copilot offering. ↑ JPMorgan Chase, a financial services company, performed well on the improved economic outlook and rebounding capital markets, which were supportive of its corporate and investment banking. ↑ Apple, a consumer electronics, software, services and technology company, rose as investors saw potential for a strong iPhone upgrade cycle given substantial demand during COVID. Top detractors from performance: ↓ Shoals Technologies Group, a provider of electrical balance of system solutions for utility-scale solar energy projects within the industrials sector, was lower as sustained higher interest rates resulting in project delays led to lower-than-expected revenues and weaker guidance from the company for 2024 revenues. ↓ LKQ, a wholesale distributor of alternative parts for the auto aftermarket in North America and Europe, was down amid weaker North American sales growth, partly due to warmer weather keeping more vehicles on the road as well as repair cost inflation from higher interest rates. ↓ Enphase Energy, manufacturer of microinverters for residential and small commercial solar PV systems, declined as higher interest rates continued to weigh on renewables stocks. | |
| 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] | ||
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended October 31, 2024 1 Year Since Inception (9/30/2021) Class C 27.93 3.57 Class C (with sales charge) 26.93 3.57 Russell 3000 Index 37.86 9.73 | |
| 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. | |
| 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 | $ 116,835,521 | |
| Holdings Count | $ / shares | 52 | [4] |
| Advisory Fees Paid, Amount | $ 629,820 | |
| Investment Company Portfolio Turnover | 47% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of October 31, 2024) Total Net Assets $116,835,521 Total Number of Portfolio Holdings * 52 Total Management Fee Paid $629,820 Portfolio Turnover Rate 47% | [4] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class FI | ||
| Shareholder Report [Line Items] | ||
| Fund Name | ClearBridge Sustainability Leaders Fund | |
| Class Name | Class FI | |
| Trading Symbol | LCSTX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about ClearBridge Sustainability Leaders Fund for the period November 1, 2023, to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| 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 . | |
| 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 $130 1.14% | [5] |
| Expenses Paid, Amount | $ 130 | |
| Expense Ratio, Percent | 1.14% | |
| Factors Affecting Performance [Text Block] | HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended October 31, 2024, Class FI shares of ClearBridge Sustainability Leaders Fund returned 28.89%. The Fund compares its performance to the Russell 3000 Index, which returned 37.86% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Microsoft, a software and technology company, continued to be supported by strong execution and its leadership position in generative AI, which drove a positive inflection for growth of its cloud platform Azure and adoption of its Copilot offering. ↑ JPMorgan Chase, a financial services company, performed well on the improved economic outlook and rebounding capital markets, which were supportive of its corporate and investment banking. ↑ Apple, a consumer electronics, software, services and technology company, rose as investors saw potential for a strong iPhone upgrade cycle given substantial demand during COVID. Top detractors from performance: ↓ Shoals Technologies Group, a provider of electrical balance of system solutions for utility-scale solar energy projects within the industrials sector, was lower as sustained higher interest rates resulting in project delays led to lower-than-expected revenues and weaker guidance from the company for 2024 revenues. ↓ LKQ, a wholesale distributor of alternative parts for the auto aftermarket in North America and Europe, was down amid weaker North American sales growth, partly due to warmer weather keeping more vehicles on the road as well as repair cost inflation from higher interest rates. ↓ Enphase Energy, manufacturer of microinverters for residential and small commercial solar PV systems, declined as higher interest rates continued to weigh on renewables stocks. | |
| 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] | ||
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended October 31, 2024 1 Year 5 Year Since Inception (3/31/2015) Class FI 28.89 12.84 11.64 Russell 3000 Index 37.86 14.60 12.52 | |
| 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. | |
| 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 | $ 116,835,521 | |
| Holdings Count | $ / shares | 52 | [6] |
| Advisory Fees Paid, Amount | $ 629,820 | |
| Investment Company Portfolio Turnover | 47% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of October 31, 2024) Total Net Assets $116,835,521 Total Number of Portfolio Holdings * 52 Total Management Fee Paid $629,820 Portfolio Turnover Rate 47% | [6] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class R | ||
| Shareholder Report [Line Items] | ||
| Fund Name | ClearBridge Sustainability Leaders Fund | |
| Class Name | Class R | |
| Trading Symbol | CBSLX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about ClearBridge Sustainability Leaders Fund for the period November 1, 2023, to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| 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 . | |
| 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 $167 1.46% | [7] |
| Expenses Paid, Amount | $ 167 | |
| Expense Ratio, Percent | 1.46% | |
| Factors Affecting Performance [Text Block] | HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended October 31, 2024, Class R shares of ClearBridge Sustainability Leaders Fund returned 28.49%. The Fund compares its performance to the Russell 3000 Index, which returned 37.86% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Microsoft, a software and technology company, continued to be supported by strong execution and its leadership position in generative AI, which drove a positive inflection for growth of its cloud platform Azure and adoption of its Copilot offering. ↑ JPMorgan Chase, a financial services company, performed well on the improved economic outlook and rebounding capital markets, which were supportive of its corporate and investment banking. ↑ Apple, a consumer electronics, software, services and technology company, rose as investors saw potential for a strong iPhone upgrade cycle given substantial demand during COVID. Top detractors from performance: ↓ Shoals Technologies Group, a provider of electrical balance of system solutions for utility-scale solar energy projects within the industrials sector, was lower as sustained higher interest rates resulting in project delays led to lower-than-expected revenues and weaker guidance from the company for 2024 revenues. ↓ LKQ, a wholesale distributor of alternative parts for the auto aftermarket in North America and Europe, was down amid weaker North American sales growth, partly due to warmer weather keeping more vehicles on the road as well as repair cost inflation from higher interest rates. ↓ Enphase Energy, manufacturer of microinverters for residential and small commercial solar PV systems, declined as higher interest rates continued to weigh on renewables stocks. | |
| 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] | ||
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended October 31, 2024 1 Year Since Inception (6/3/2022) Class R 28.49 8.91 Russell 3000 Index 37.86 15.64 | |
| 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. | |
| 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 | $ 116,835,521 | |
| Holdings Count | $ / shares | 52 | [8] |
| Advisory Fees Paid, Amount | $ 629,820 | |
| Investment Company Portfolio Turnover | 47% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of October 31, 2024) Total Net Assets $116,835,521 Total Number of Portfolio Holdings * 52 Total Management Fee Paid $629,820 Portfolio Turnover Rate 47% | [8] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class I | ||
| Shareholder Report [Line Items] | ||
| Fund Name | ClearBridge Sustainability Leaders Fund | |
| Class Name | Class I | |
| Trading Symbol | LCISX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about ClearBridge Sustainability Leaders Fund for the period November 1, 2023, to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| 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 . | |
| 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 $99 0.86% | [9] |
| Expenses Paid, Amount | $ 99 | |
| Expense Ratio, Percent | 0.86% | |
| Factors Affecting Performance [Text Block] | HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended October 31, 2024, Class I shares of ClearBridge Sustainability Leaders Fund returned 29.26%. The Fund compares its performance to the Russell 3000 Index, which returned 37.86% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Microsoft, a software and technology company, continued to be supported by strong execution and its leadership position in generative AI, which drove a positive inflection for growth of its cloud platform Azure and adoption of its Copilot offering. ↑ JPMorgan Chase, a financial services company, performed well on the improved economic outlook and rebounding capital markets, which were supportive of its corporate and investment banking. ↑ Apple, a consumer electronics, software, services and technology company, rose as investors saw potential for a strong iPhone upgrade cycle given substantial demand during COVID. Top detractors from performance: ↓ Shoals Technologies Group, a provider of electrical balance of system solutions for utility-scale solar energy projects within the industrials sector, was lower as sustained higher interest rates resulting in project delays led to lower-than-expected revenues and weaker guidance from the company for 2024 revenues. ↓ LKQ, a wholesale distributor of alternative parts for the auto aftermarket in North America and Europe, was down amid weaker North American sales growth, partly due to warmer weather keeping more vehicles on the road as well as repair cost inflation from higher interest rates. ↓ Enphase Energy, manufacturer of microinverters for residential and small commercial solar PV systems, declined as higher interest rates continued to weigh on renewables stocks. | |
| 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] | ||
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended October 31, 2024 1 Year 5 Year Since Inception (3/31/2015) Class I 29.26 13.23 12.03 Russell 3000 Index 37.86 14.60 12.52 | |
| 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. | |
| 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 | $ 116,835,521 | |
| Holdings Count | $ / shares | 52 | [10] |
| Advisory Fees Paid, Amount | $ 629,820 | |
| Investment Company Portfolio Turnover | 47% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of October 31, 2024) Total Net Assets $116,835,521 Total Number of Portfolio Holdings * 52 Total Management Fee Paid $629,820 Portfolio Turnover Rate 47% | [10] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class IS | ||
| Shareholder Report [Line Items] | ||
| Fund Name | ClearBridge Sustainability Leaders Fund | |
| Class Name | Class IS | |
| Trading Symbol | LCILX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about ClearBridge Sustainability Leaders Fund for the period November 1, 2023, to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | annual shareholder report | |
| 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 . | |
| 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 $87 0.76% | [11] |
| Expenses Paid, Amount | $ 87 | |
| Expense Ratio, Percent | 0.76% | |
| Factors Affecting Performance [Text Block] | HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE? For the twelve months ended October 31, 2024, Class IS shares of ClearBridge Sustainability Leaders Fund returned 29.39%. The Fund compares its performance to the Russell 3000 Index, which returned 37.86% for the same period. PERFORMANCE HIGHLIGHTS Top contributors to performance: ↑ Microsoft, a software and technology company, continued to be supported by strong execution and its leadership position in generative AI, which drove a positive inflection for growth of its cloud platform Azure and adoption of its Copilot offering. ↑ JPMorgan Chase, a financial services company, performed well on the improved economic outlook and rebounding capital markets, which were supportive of its corporate and investment banking. ↑ Apple, a consumer electronics, software, services and technology company, rose as investors saw potential for a strong iPhone upgrade cycle given substantial demand during COVID. Top detractors from performance: ↓ Shoals Technologies Group, a provider of electrical balance of system solutions for utility-scale solar energy projects within the industrials sector, was lower as sustained higher interest rates resulting in project delays led to lower-than-expected revenues and weaker guidance from the company for 2024 revenues. ↓ LKQ, a wholesale distributor of alternative parts for the auto aftermarket in North America and Europe, was down amid weaker North American sales growth, partly due to warmer weather keeping more vehicles on the road as well as repair cost inflation from higher interest rates. ↓ Enphase Energy, manufacturer of microinverters for residential and small commercial solar PV systems, declined as higher interest rates continued to weigh on renewables stocks. | |
| 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] | ||
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended October 31, 2024 1 Year 5 Year Since Inception (3/31/2015) Class IS 29.39 13.31 12.09 Russell 3000 Index 37.86 14.60 12.52 | |
| 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. | |
| 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 | $ 116,835,521 | |
| Holdings Count | $ / shares | 52 | [12] |
| Advisory Fees Paid, Amount | $ 629,820 | |
| Investment Company Portfolio Turnover | 47% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of October 31, 2024) Total Net Assets $116,835,521 Total Number of Portfolio Holdings * 52 Total Management Fee Paid $629,820 Portfolio Turnover Rate 47% | [12] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| [1] * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. * Does not include derivatives, except purchased options, if any. | ||
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | |||||||||
| Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015 | |
| Class A | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Class A (with sales charge) | |||||||||
| Account Value | $ 26,689 | $ 20,706 | $ 20,708 | $ 25,172 | $ 18,095 | $ 14,564 | $ 11,946 | $ 11,305 | $ 9,102 | |
| Class C | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Class C (with sales charge) | |||||||||
| Account Value | $ 11,141 | 8,708 | 8,771 | 10,739 | ||||||
| Class FI | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Class FI | |||||||||
| Account Value | $ 28,730 | 22,291 | 22,300 | 27,115 | 19,498 | 15,707 | 12,910 | 12,205 | 9,810 | $ 10,070 |
| Class R | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Class R | |||||||||
| Account Value | $ 12,285 | 9,561 | 9,592 | |||||||
| Class I | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Class I | |||||||||
| Account Value | $ 2,970,503 | 2,298,014 | 2,290,698 | 2,777,014 | 1,988,840 | 1,595,666 | 1,305,744 | 1,230,664 | 986,348 | 1,009,000 |
| Class IS | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Class IS | |||||||||
| Account Value | $ 2,986,499 | 2,308,137 | 2,298,936 | 2,783,964 | 1,992,423 | 1,598,665 | 1,307,606 | 1,232,654 | 987,110 | 1,009,000 |
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Account Value | $ 30,527 | 22,143 | 20,432 | 24,472 | 17,005 | 15,439 | 13,605 | 12,763 | 10,295 | |
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Account Value | $ 13,318 | 9,660 | 8,914 | 10,676 | ||||||
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Account Value | $ 30,983 | 22,474 | 20,737 | 24,837 | 17,259 | 15,669 | 13,808 | 12,954 | 10,449 | 10,021 |
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Account Value | $ 14,202 | 10,302 | 9,505 | |||||||
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Account Value | $ 3,098,330 | 2,247,429 | 2,073,685 | 2,483,718 | 1,725,934 | 1,566,939 | 1,380,793 | 1,295,395 | 1,044,858 | 1,002,121 |
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Account Value | $ 3,098,330 | $ 2,247,429 | $ 2,073,685 | $ 2,483,718 | $ 1,725,934 | $ 1,566,939 | $ 1,380,793 | $ 1,295,395 | $ 1,044,858 | $ 1,002,121 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 29 Months Ended | 37 Months Ended | 60 Months Ended | 108 Months Ended | 115 Months Ended |
| Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | |
| Class A | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class A (with sales charge) | |||||
| Average Annual Return, Percent | 21.78% | 11.56% | 11.53% | |||
| Class C | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class C (with sales charge) | |||||
| Average Annual Return, Percent | 26.93% | 3.57% | ||||
| Class FI | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class FI | |||||
| Average Annual Return, Percent | 28.89% | 12.84% | 11.64% | |||
| Class R | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class R | |||||
| Average Annual Return, Percent | 28.49% | 8.91% | ||||
| Class I | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class I | |||||
| Average Annual Return, Percent | 29.26% | 13.23% | 12.03% | |||
| Class IS | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class IS | |||||
| Average Annual Return, Percent | 29.39% | 13.31% | 12.09% | |||
| Without Sales Load [Member] | Class A | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class A | |||||
| Average Annual Return, Percent | 28.89% | 12.88% | 12.27% | |||
| Without Sales Load [Member] | Class C | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Class C | |||||
| Average Annual Return, Percent | 27.93% | 3.57% | ||||
| Russell 3000 Index [Member] | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||
| Average Annual Return, Percent | 37.86% | 14.60% | 13.19% | |||
| Russell 3000 Index [Member] | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||
| Average Annual Return, Percent | 37.86% | 9.73% | ||||
| Russell 3000 Index [Member] | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||
| Average Annual Return, Percent | 37.86% | 14.60% | 12.52% | |||
| Russell 3000 Index [Member] | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||
| Average Annual Return, Percent | 37.86% | 15.64% | ||||
| Russell 3000 Index [Member] | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||
| Average Annual Return, Percent | 37.86% | 14.60% | 12.52% | |||
| Russell 3000 Index [Member] | ||||||
| Average Annual Return [Line Items] | ||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||
| Average Annual Return, Percent | 37.86% | 14.60% | 12.52% |
| Label | Element | Value |
| Class A | Information Technology [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 30.30% |
| Class A | Health Care [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.70% |
| Class A | Financials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.10% |
| Class A | Industrials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 11.50% |
| Class A | Consumer Discretionary [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.40% |
| Class A | Materials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 5% |
| Class A | Consumer Staples [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.80% |
| Class A | Communication Services [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.70% |
| Class A | Real Estate [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 3% |
| Class A | Utilities [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 1.50% |
| Label | Element | Value |
| Class C | Information Technology [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 30.30% |
| Class C | Health Care [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.70% |
| Class C | Financials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.10% |
| Class C | Industrials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 11.50% |
| Class C | Consumer Discretionary [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.40% |
| Class C | Materials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 5% |
| Class C | Consumer Staples [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.80% |
| Class C | Communication Services [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.70% |
| Class C | Real Estate [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 3% |
| Class C | Utilities [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 1.50% |
| Label | Element | Value |
| Class FI | Information Technology [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 30.30% |
| Class FI | Health Care [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.70% |
| Class FI | Financials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.10% |
| Class FI | Industrials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 11.50% |
| Class FI | Consumer Discretionary [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.40% |
| Class FI | Materials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 5% |
| Class FI | Consumer Staples [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.80% |
| Class FI | Communication Services [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.70% |
| Class FI | Real Estate [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 3% |
| Class FI | Utilities [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 1.50% |
| Label | Element | Value |
| Class R | Information Technology [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 30.30% |
| Class R | Health Care [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.70% |
| Class R | Financials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.10% |
| Class R | Industrials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 11.50% |
| Class R | Consumer Discretionary [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.40% |
| Class R | Materials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 5% |
| Class R | Consumer Staples [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.80% |
| Class R | Communication Services [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.70% |
| Class R | Real Estate [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 3% |
| Class R | Utilities [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 1.50% |
| Label | Element | Value |
| Class I | Information Technology [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 30.30% |
| Class I | Health Care [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.70% |
| Class I | Financials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.10% |
| Class I | Industrials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 11.50% |
| Class I | Consumer Discretionary [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.40% |
| Class I | Materials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 5% |
| Class I | Consumer Staples [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.80% |
| Class I | Communication Services [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.70% |
| Class I | Real Estate [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 3% |
| Class I | Utilities [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 1.50% |
| Label | Element | Value |
| Class IS | Information Technology [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 30.30% |
| Class IS | Health Care [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.70% |
| Class IS | Financials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 14.10% |
| Class IS | Industrials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 11.50% |
| Class IS | Consumer Discretionary [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.40% |
| Class IS | Materials [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 5% |
| Class IS | Consumer Staples [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.80% |
| Class IS | Communication Services [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 4.70% |
| Class IS | Real Estate [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 3% |
| Class IS | Utilities [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 1.50% |
