Other Expenses Interest Expense [Member] Shareholder Fees - Tax-Aware Overlay B Portfolio |
Sep. 30, 2025 |
|---|---|
| Class 1 | |
| Prospectus [Line Items] | |
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | 0.00% |
| Maximum Deferred Sales Charge (as a percentage) | 0.00% |
| Class 2 | |
| Prospectus [Line Items] | |
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | 0.00% |
| Maximum Deferred Sales Charge (as a percentage) | 0.00% |