Equity-accounted Investments - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disclosure of joint ventures [line items]
Equity in loss of investment in joint venture and associates	$ 4,727	$ 4,941
Impairment charges on equity-accounted investment	4,634	0
Weichai Ballard JV
Disclosure of joint ventures [line items]
Equity in loss of investment in joint venture and associates	$ 4,727	$ 4,941
Proportion of ownership interest in joint venture (in percent)	49.00%	49.00%
Weichai Ballard JV \| Impairment charges on equity-accounted investment
Disclosure of joint ventures [line items]
Impairment charges on equity-accounted investment	$ 4,634	$ 0

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2025-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2025-en-r&anchor=para_17_b_iii&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2025-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2025-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2025-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_ProportionOfOwnershipInterestInJointVenture
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration