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Schedule of Issued Capital (Details) (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
IfrsStatementLineItems [Line Items]
Advisor options exercised, shares	327,142
Advisor options forfeited, shares	16,193
Bottom of range [member]
IfrsStatementLineItems [Line Items]
Contractual capitalised interest rate	8.50%
Top of range [member]
IfrsStatementLineItems [Line Items]
Contractual capitalised interest rate	15.00%

X

- Definition

Advisor options exercised shares

+ References

No definition available.

+ Details

Name:	MMA_AdvisorOptionsExercisedShares
Namespace Prefix:	MMA_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Advisor options forfeited shares.

+ References

No definition available.

+ Details

Name:	MMA_AdvisorOptionsForfeitedShares
Namespace Prefix:	MMA_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Contractual capitalised interest rate

+ References

No definition available.

+ Details

Name:	MMA_ContractualCapitalisedInterestRate
Namespace Prefix:	MMA_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	MMA_IfrsStatementLineItems
Namespace Prefix:	MMA_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: