v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
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, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Class I  
Shareholder Report [Line Items]  
Fund Name Franklin Multi-Asset Variable Growth Fund
Class Name Class I
No Trading Symbol 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, 2026, to June 30, 2026.
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 I1,2
$7
0.14%
[1],[2],[3]
Expenses Paid, Amount $ 7 [1],[2]
Expense Ratio, Percent 0.14% [1],[2]
Net Assets $ 70,328,371
Holdings Count | $ / shares 9
Investment Company Portfolio Turnover 45.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$70,328,371
Total Number of Portfolio Holdings
9
Portfolio Turnover Rate
45%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [4]
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 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, 2026, to June 30, 2026.
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 I1,2
$10
0.20%
[5],[6],[7],[8]
Expenses Paid, Amount $ 10 [5],[6]
Expense Ratio, Percent 0.20% [5],[6]
Net Assets $ 27,752,558
Holdings Count | $ / shares 9
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$27,752,558
Total Number of Portfolio Holdings
9
Portfolio Turnover Rate
38%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [9]
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 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, 2026, to June 30, 2026.
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 I1,2
$7
0.13%
[10],[11],[12]
Expenses Paid, Amount $ 7 [10],[11]
Expense Ratio, Percent 0.13% [10],[11]
Net Assets $ 76,823,832
Holdings Count | $ / shares 9
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$76,823,832
Total Number of Portfolio Holdings
9
Portfolio Turnover Rate
30%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [13]
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 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, 2026, to June 30, 2026.
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 II1,2
$19
0.38%
[14],[15],[16]
Expenses Paid, Amount $ 19 [14],[15]
Expense Ratio, Percent 0.38% [14],[15]
Net Assets $ 76,823,832
Holdings Count | $ / shares 9
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$76,823,832
Total Number of Portfolio Holdings
9
Portfolio Turnover Rate
30%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition*  (% of Total Investments)
image
 [17]
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]
2 Excludes fees and expenses of the underlying funds in which the Fund invests.
[3]
† Annualized.
[4]
* Does not include derivatives, except purchased options, if any.  
[5]
1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products.
[6]
2 Excludes fees and expenses of the underlying funds in which the Fund invests.
[7]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[8]
† Annualized.
[9]
* Does not include derivatives, except purchased options, if any.  
[10]
1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products.
[11]
2 Excludes fees and expenses of the underlying funds in which the Fund invests.
[12]
† Annualized.
[13]
* Does not include derivatives, except purchased options, if any.  
[14]
1 Does not reflect expenses incurred from investing through variable annuity or variable life insurance products.
[15]
2 Excludes fees and expenses of the underlying funds in which the Fund invests.
[16]
† Annualized.
[17]
* Does not include derivatives, except purchased options, if any.