MFS Research International Portfolio Shareholder Fees - MFS Research International Portfolio |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Shareholder Fee, Other | $ 0 |
| Class B | |
| Prospectus [Line Items] | |
| Shareholder Fee, Other | 0 |
| Class E | |
| Prospectus [Line Items] | |
| Shareholder Fee, Other | $ 0 |