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

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

- Definition

Longterm deposit.

+ References

No definition available.

+ Details

Name:	BMGL_LongtermDeposit
Namespace Prefix:	BMGL_
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
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_LongtermDeposits
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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph B9
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B9_b&doctype=Appendix&subtype=B
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 78
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_b&doctype=Standard
-URIDate 2025-03-27

+ Details

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

- Definition

The amount of receivables due from related parties. [Refer: Total for all related parties [member]]

+ References

+ Details

Name:	ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties
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

Name:	ifrs-full_TypesOfRisksAxis=BMGL_LifeTimeExpectedCreditLossMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfRisksAxis=BMGL_TwelveExpectedCreditLossMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

Schedule of financial assets, minimum exposure to credit risk (Details)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 SGD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 SGD ($)	Jun. 30, 2024 SGD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 SGD ($)
IfrsStatementLineItems [Line Items]
Trade receivables	$ 2,514,375	$ 3,233,234	$ 1,797,209	$ 2,285,870	$ 1,886,804
Deposits	5,489,917	7,105,501	5,324,813	6,772,629	90,252
Amount due from related parties						$ 8,783,276	$ 11,877,624
Gross carrying amount [member] \| Category I [Member] \| Life time expected credit loss [member]
IfrsStatementLineItems [Line Items]
Trade receivables	2,971,932	3,821,607	2,154,300	2,740,055	2,133,573
Gross carrying amount [member] \| Category I [Member] \| Twelve expected credit loss [member]
IfrsStatementLineItems [Line Items]
Other receivables	154,162	198,237	105,502	134,188	213,644
Deposits	5,489,917	7,105,501	5,324,813	6,996,631
Deposits				6,772,629	90,252
Amount due from related parties					10,557,240
Allowance for credit losses [member]
IfrsStatementLineItems [Line Items]
Expected credit losses	(457,557)	(588,373)	(462,593)	(588,373)	(460,413)
Allowance for credit losses [member] \| Category I [Member] \| Life time expected credit loss [member]
IfrsStatementLineItems [Line Items]
Trade receivables	(457,557)	(588,373)	(462,593)	(588,373)	(460,413)
Allowance for credit losses [member] \| Category I [Member] \| Twelve expected credit loss [member]
IfrsStatementLineItems [Line Items]
Other receivables
Deposits
Deposits
Amount due from related parties
Carrying amount [member] \| Category I [Member] \| Life time expected credit loss [member]
IfrsStatementLineItems [Line Items]
Trade receivables	2,514,375	3,233,234	1,691,707	2,151,682	1,673,160
Carrying amount [member] \| Category I [Member] \| Twelve expected credit loss [member]
IfrsStatementLineItems [Line Items]
Other receivables	154,162	198,237	105,502	134,188	213,644
Deposits	$ 5,489,917	$ 7,105,501	$ 5,324,813	6,996,631
Deposits				$ 6,772,629	90,252
Amount due from related parties					$ 10,557,240