Capital Commitments, Term

No definition available.

Name:	bldp_CapitalCommitmentsTerm
Namespace Prefix:	bldp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Intellectual Property, Term

+ References

No definition available.

+ Details

Name:	bldp_IntellectualPropertyTerm
Namespace Prefix:	bldp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Investments Committing to be Limited Partner

+ References

No definition available.

+ Details

Name:	bldp_NumberOfInvestmentsCommittingToBeLimitedPartner
Namespace Prefix:	bldp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Payments for Royalty Agreement

+ References

No definition available.

+ Details

Name:	bldp_PaymentsForRoyaltyAgreement
Namespace Prefix:	bldp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Royalty Obligation, Maximum Amount

+ References

No definition available.

+ Details

Name:	bldp_RoyaltyObligationContingentMaximumAmount
Namespace Prefix:	bldp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Royalty Obligation, Percentage

+ References

No definition available.

+ Details

Name:	bldp_RoyaltyObligationContingentPercentage
Namespace Prefix:	bldp_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of future capital expenditures that the entity is committed to make.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_CapitalCommitments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

- Definition

The cash outflow to acquire interests in joint ventures (other than payments for those instruments considered to be cash equivalents or those held for dealing or trading purposes), classified as investing activities. [Refer: Total for all joint ventures [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 16
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16_c&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of expense arising from royalties.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 85
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_RoyaltyExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	bldp_CommitmentsTypeAxis=ifrs-full_PropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bldp_CommitmentsTypeAxis=bldp_HydrogenSupplyAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=bldp_TemplewaterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bldp_InvestmentContributionsAxis=bldp_InitialContributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=bldp_ProvisionRelatedToIntellectualPropertyPurchaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=ifrs-full_MiscellaneousOtherProvisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=bldp_HyCapFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=bldp_CleanH2FundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and contingencies (Details) € in Thousands, £ in Thousands, $ in Thousands	1 Months Ended		12 Months Ended						37 Months Ended	41 Months Ended
	Dec. 31, 2021 USD ($)	Aug. 31, 2021 GBP (£)	Dec. 31, 2024 USD ($) investment	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 EUR (€)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 USD ($) investment	Dec. 31, 2024 GBP (£) investment	Dec. 31, 2024 EUR (€) investment	Dec. 31, 2024 CAD ($) investment
Disclosure of other provisions [line items]
Number of investments committing \| investment			2							2	2	2	2
Property, plant and equipment [member]
Disclosure of other provisions [line items]
Capital commitments			$ 14,512,000							$ 14,512,000
Hydrogen Supply Agreement
Disclosure of other provisions [line items]
Capital commitments			$ 9,441,000							9,441,000
Capital commitments, term			5 years	5 years	5 years
Templewater
Disclosure of other provisions [line items]
Contributions (Proceeds)			$ 527,000
Initial Contribution \| Templewater
Disclosure of other provisions [line items]
Capital commitments			$ 1,000,000							1,000,000
Royalty related to UTC, revenue obligations
Disclosure of other provisions [line items]
Expiration period (years)			15 years	15 years	15 years
Royalty payments			$ 0			$ 0
Royalty obligation, percentage			2.00%	2.00%	2.00%
Maximum royalty expense			$ 4,613,000							4,613,000			$ 5,351
Royalty expense			$ 0
Royalty of other revenue obligations
Disclosure of other provisions [line items]
Royalty obligation, percentage			2.00%	2.00%	2.00%
Maximum royalty expense			$ 1,896,000							1,896,000			$ 2,200
Royalty expense			0
HyCap Fund
Disclosure of other provisions [line items]
Contributions (Proceeds)		£ 15,755		£ 15,754						$ 20,314,000
HyCap Fund \| Initial Contribution
Disclosure of other provisions [line items]
Capital commitments \| £											£ 25,000
Contributions (Proceeds)			6,102,000	£ 4,768		4,624,000	£ 3,771
CleanH2 Fund
Disclosure of other provisions [line items]
Contributions (Proceeds)	$ 10,475,000				€ 9,663				€ 9,663
CleanH2 Fund \| Initial Contribution
Disclosure of other provisions [line items]
Capital commitments \| €												€ 30,000
Contributions (Proceeds)			$ 5,328,000		€ 4,962	$ 3,983,000		€ 3,705