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v3.26.1

Segment information - Customer concentration (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment information |  |  |
Revenue from Product Services | $ 2,566,394 | $ 2,600,944 | $ 1,722,820
Product Services |  |  |
Segment information |  |  |
Revenue from Product Services | 2,566,394 | 2,600,944 | 1,722,820
Top customer | Product Services |  |  |
Segment information |  |  |
Revenue from Product Services | $ 281,000 | $ 347,000 | $ 306,000

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- Definition The amount of revenue arising from product services. + References No definition available. + Details
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Namespace Prefix: | bwlp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_SegmentsAxis=bwlp_ProductServicesBusinessSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_MajorCustomersAxis=bwlp_CustomerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |