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Material accounting policies - Schedule of Subsidiaries (Details) | 12 Months Ended
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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 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 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph 19B -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2024-03-27 + Details
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