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v3.26.1

Related party transactions - Services (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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- 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

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- 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

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- References No definition available. + Details
Name: | ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration