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Related party transactions - Services (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related party transactions
Corporate service fees charged by related parties	$ 8,692	$ 6,887	$ 6,615
Ship management fees charged by a related party	$ 533	$ 808	$ 1,272

X

- Definition

The amount of corporate services received in related party transactions

+ References

No definition available.

+ Details

Name:	bwlp_CorporateServicesReceivedRelatedPartyTransactions
Namespace Prefix:	bwlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of ship management services received in related party transactions

+ References

No definition available.

+ Details

Name:	bwlp_ShipManagementServicesReceivedRelatedPartyTransactions
Namespace Prefix:	bwlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration