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Legal Proceedings - Additional Information (Details) - Plaintiffs	3 Months Ended
	Sep. 30, 2022 USD ($)
Disclosure Of Legal Proceedings [Line Items]
Provision for litigation settlements	$ 2,000,000.0
Admission of liability	$ 0

X

- Definition

Admission of liability.

+ References

No definition available.

+ Details

Name:	meso_AdmissionOfLiability
Namespace Prefix:	meso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Disclosure of legal proceedings.

+ References

No definition available.

+ Details

Name:	meso_DisclosureOfLegalProceedingsLineItems
Namespace Prefix:	meso_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Provision for litigation settlements.

+ References

No definition available.

+ Details

Name:	meso_ProvisionForLitigationSettlements
Namespace Prefix:	meso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	ifrs-full_CounterpartiesAxis=meso_PlaintiffsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: