Performance Management |
Feb. 28, 2026 |
|---|---|
| MFS Active Short Duration Income ETF | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Performance Information |
| Performance Narrative [Text Block] | The bar chart and performance table are not included because the fund has not had a full calendar year of operations. Once the fund has commenced operations, updated performance information will be available online at mfs.com. Past performance (before and after taxes) does not necessarily indicate how the fund will perform in the future. |
| Performance Availability Website Address [Text] | mfs.com |
| MFS Active Short Muni Bond ETF | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Performance Information |
| Performance Narrative [Text Block] | The bar chart and performance table are not included because the fund has not had a full calendar year of operations. Once the fund has commenced operations, updated performance information will be available online at mfs.com. Past performance (before and after taxes) does not necessarily indicate how the fund will perform in the future. |
| Performance Availability Website Address [Text] | mfs.com |