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Material accounting policies - Schedule of Subsidiaries (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Ballard Motive Solutions
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Guangzhou Ballard Power Systems Co., Ltd.
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Ballard Power Systems Europe A/S
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Ballard Hong Kong Ltd.
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Ballard US Inc.
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Ballard Services Inc.
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Ballard Fuel Cell Systems Inc.
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%
Ballard Power Corporation
Disclosure of joint ventures [line items]
Proportion of ownership interest in subsidiary	100.00%	100.00%

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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.

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- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2024-01-01
-Paragraph 17
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-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2024-03-27

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