| Label | Element | Value |
|---|---|---|
| Risk Return Abstract | rr_RiskReturnAbstract | |
| Registrant Name | dei_EntityRegistrantName | Vanguard Massachusetts Tax-Exempt Funds |
| Prospectus Date | rr_ProspectusDate | Mar. 29, 2023 |
| Document Creation Date | dei_DocumentCreationDate | Mar. 28, 2023 |