Form N-CSR Cover
| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Legg Mason Partners Variable Equity Trust |
| Entity Central Index Key | 0001176343 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
Shareholder Report
| Shareholder Report | 6 Months Ended | |
| Jun. 30, 2024 USD ($) $ / shares | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| Amendment Flag | false | |
| Registrant Name | Legg Mason Partners Variable Equity Trust | |
| Entity Central Index Key | 0001176343 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Jun. 30, 2024 | |
| Class I | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Franklin Multi-Asset Variable Growth Fund | |
| Class Name | Class I | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Franklin Multi-Asset Variable Growth Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 SIX MONTHS? (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 1, 2 $7 0.14% | [1],[2],[3] |
| Expenses Paid, Amount | $ 7 | [1],[2] |
| Expense Ratio, Percent | 0.14% | [1],[2] |
| Net Assets | $ 74,106,218 | |
| Holdings Count | $ / shares | 11 | [4] |
| Investment Company Portfolio Turnover | 3% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $74,106,218 Total Number of Portfolio Holdings * 11 Portfolio Turnover Rate 3% | [4] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class I | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Franklin Multi-Asset Variable Moderate Growth Fund | |
| Class Name | Class I | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Franklin Multi-Asset Variable Moderate Growth Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 SIX MONTHS? (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 1, 2 $10 0.20% | [5],[6],[7],[8] |
| Expenses Paid, Amount | $ 10 | [5],[6] |
| Expense Ratio, Percent | 0.20% | [5],[6] |
| Net Assets | $ 28,949,004 | |
| Holdings Count | $ / shares | 11 | [9] |
| Investment Company Portfolio Turnover | 4% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $28,949,004 Total Number of Portfolio Holdings * 11 Portfolio Turnover Rate 4% | [9] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class I | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Franklin Multi-Asset Variable Conservative Growth Fund | |
| Class Name | Class I | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Franklin Multi-Asset Variable Conservative Growth Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 SIX MONTHS? (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 1, 2 $7 0.13% | [10],[11],[12] |
| Expenses Paid, Amount | $ 7 | [10],[11] |
| Expense Ratio, Percent | 0.13% | [10],[11] |
| Net Assets | $ 79,225,631 | |
| Holdings Count | $ / shares | 11 | [13] |
| Investment Company Portfolio Turnover | 5% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $79,225,631 Total Number of Portfolio Holdings * 11 Portfolio Turnover Rate 5% | [13] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| Class II | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Franklin Multi-Asset Variable Conservative Growth Fund | |
| Class Name | Class II | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Franklin Multi-Asset Variable Conservative Growth Fund for the period January 1, 2024, to June 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | semi-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 SIX MONTHS? (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 II 1, 2 $20 0.38% | [14],[15],[16] |
| Expenses Paid, Amount | $ 20 | [14],[15] |
| Expense Ratio, Percent | 0.38% | [14],[15] |
| Net Assets | $ 79,225,631 | |
| Holdings Count | $ / shares | 11 | [17] |
| Investment Company Portfolio Turnover | 5% | |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Total Net Assets $79,225,631 Total Number of Portfolio Holdings * 11 Portfolio Turnover Rate 5% | [17] |
| Holdings [Text Block] | ||
| Updated Prospectus Web Address | https://www.franklintempleton.com/regulatory-fund-documents | |
| [1] 1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products. 2 Excludes the fees and expenses of the underlying Funds. † Annualized. * Does not include derivatives, except purchased options, if any. 1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products. 2 Excludes the fees and expenses of the underlying Funds. * Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher. † Annualized. * Does not include derivatives, except purchased options, if any. 1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products. 2 Excludes the fees and expenses of the underlying Funds. † Annualized. * Does not include derivatives, except purchased options, if any. 1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products. 2 Excludes the fees and expenses of the underlying Funds. † Annualized. * Does not include derivatives, except purchased options, if any. | ||
Shareholder Report, Holdings (D
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| Class I | Domestic Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 68.70% |
| Class I | Foreign Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.90% |
| Class I | Domestic Fixed Income [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| Class I | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.50% |
| Class I | Domestic Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 61.40% |
| Class I | Foreign Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.30% |
| Class I | Domestic Fixed Income [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18% |
| Class I | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.30% |
| Class I | Domestic Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 46.70% |
| Class I | Domestic Fixed Income [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 37.90% |
| Class I | Foreign Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15% |
| Class I | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |
| Class II | Domestic Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 46.70% |
| Class II | Domestic Fixed Income [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 37.90% |
| Class II | Foreign Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15% |
| Class II | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |