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v3.25.0.1

Lease liability - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items] |  |
Payments of lease liabilities | $ 3,327 | $ 4,013
Deferred gain on finance lease liability | $ 69 | $ 485
Bottom of range |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Interest rate | 2.95% |
Top of range |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Interest rate | 9.42% |

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- Definition Deferred Gain On Finance Lease Liability + References No definition available. + Details
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Namespace Prefix: | bldp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Leases, Interest Rate + References No definition available. + Details
Name: | bldp_LeasesInterestRate
Namespace Prefix: | bldp_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Principal Payments of Lease Liabilities + References No definition available. + Details
Name: | bldp_PrincipalPaymentsOfLeaseLiabilities
Namespace Prefix: | bldp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |