Credit risk trade receivables.

No definition available.

Name:	BMGL_CreditRiskTradeReceivables
Namespace Prefix:	BMGL_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Expected credit losses.

+ References

No definition available.

+ Details

Name:	BMGL_ExpectedCreditLosses
Namespace Prefix:	BMGL_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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Namespace Prefix:	BMGL_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

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-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of long-term deposits held by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
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+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current other receivables. [Refer: Other receivables]

+ References

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+ Details

Name:	ifrs-full_OtherCurrentReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of non-current other receivables. [Refer: Other receivables]

+ References

+ Details

Name:	ifrs-full_OtherNoncurrentReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	ifrs-full_BusinessCombinationsAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	BMGL_CategoryAxis=BMGL_CategoryOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

Schedule of financial assets, minimum exposure to credit risk (Details)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 SGD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 SGD ($)	Jun. 30, 2024 SGD ($)
IfrsStatementLineItems [Line Items]
Cash and cash equivalents	$ 409,464	$ 529,887	$ 2,393,636	$ 3,044,466	$ 1,951,053
Trade receivables	2,060,285	2,666,215		2,151,682
Deposits	5,455,956	7,060,553		6,772,629
Gross carrying amount [member] \| Category I [Member] \| Twelve expected credit loss [member]
IfrsStatementLineItems [Line Items]
Cash and cash equivalents	409,464	529,887		3,044,466
Other receivables	81,762	105,811		134,188
Deposits	5,455,956	7,060,553		6,772,629
Amount due from related parties	768,730	994,812
Gross carrying amount [member] \| Category I [Member] \| Life time expected credit loss [member]
IfrsStatementLineItems [Line Items]
Trade receivables	2,729,285	3,531,968		2,740,055
Allowance for credit losses [member]
IfrsStatementLineItems [Line Items]
Expected credit losses	(669,000)	(865,753)		(588,373)
Allowance for credit losses [member] \| Category I [Member] \| Twelve expected credit loss [member]
IfrsStatementLineItems [Line Items]
Cash and cash equivalents
Other receivables
Deposits
Amount due from related parties
Allowance for credit losses [member] \| Category I [Member] \| Life time expected credit loss [member]
IfrsStatementLineItems [Line Items]
Trade receivables	(669,000)	(865,753)		(588,373)
Carrying amount [member] \| Category I [Member] \| Twelve expected credit loss [member]
IfrsStatementLineItems [Line Items]
Cash and cash equivalents	409,464	529,887		3,044,466
Other receivables	81,762	105,811		134,188
Deposits	5,455,956	7,060,553		6,772,629
Amount due from related parties	768,730	994,812
Carrying amount [member] \| Category I [Member] \| Life time expected credit loss [member]
IfrsStatementLineItems [Line Items]
Trade receivables	$ 2,060,285	$ 2,666,215		$ 2,151,682