Foreign Currency Transaction Gain (Loss), Unrealized1

No definition available.

Name:	bldp_ForeignCurrencyTransactionGainLossUnrealized1
Namespace Prefix:	bldp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility, Maximum Borrowing Capacity1

+ References

No definition available.

+ Details

Name:	bldp_LineOfCreditFacilityMaximumBorrowingCapacity1
Namespace Prefix:	bldp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The average price of a hedging instrument. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 23B
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_23B_b&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_AveragePriceOfHedgingInstrument
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard
-URIDate 2021-03-24

+ Details

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

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=bldp_BankOperatingLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=bldp_EncoreFXFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Bank facilities (Details) $ in Thousands	Dec. 31, 2021 CAD ($) $ / $	Dec. 31, 2021 USD ($) $ / $	Dec. 31, 2020 CAD ($)
Disclosure of detailed information about borrowings [line items]
Unrealized gain (loss) on forward foreign exchange contracts	$ (33,000)		$ 632,000
Currency risk
Disclosure of detailed information about borrowings [line items]
Foreign exchange contracts	$ 26,500,000		16,750,000
Average price of hedging instrument (CDN per USD)	1.26	1.26
LG Facility
Disclosure of detailed information about borrowings [line items]
Facility, maximum borrowing capacity	$ 2,000,000
Borrowings outstanding	0		$ 0
FX Facility
Disclosure of detailed information about borrowings [line items]
Facility, maximum borrowing capacity	$ 29,000,000	$ 23,684