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Investments - Narrative (Details) € in Thousands, ¥ in Thousands, £ in Thousands |  | 1 Months Ended | 12 Months Ended |
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Sep. 26, 2016 | Sep. 30, 2022 EUR (€) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 EUR (€) | Oct. 31, 2021 | Aug. 31, 2021 USD ($) | Aug. 31, 2021 GBP (£) | Dec. 31, 2022 USD ($) hydrogen_Fund | Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 GBP (£) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 USD ($)
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in loss of investment in joint venture and associates |  |  |  |  |  |  |  |  | $ 11,617,000 |  |  |  | $ 16,140,000 |  |  |  |
Number of hydrogens | hydrogen_Fund |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Investments |  |  |  | $ 70,292,000 |  |  |  |  | $ 66,357,000 |  |  |  | 70,292,000 |  |  |  |
Foreign exchange gain (loss) |  |  |  |  |  |  |  |  | (16,877,000) |  |  |  | (9,025,000) |  |  |  |
Decrease in short term investments |  |  |  |  |  |  |  |  | (16,892,000) |  |  |  | (10,447,000) |  |  |  |
Increase in short term investment |  |  |  |  |  |  |  |  | 15,000 |  |  |  | 1,422,000 |  |  |  |
Synergy Ballard JVCo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in loss of investment in joint venture and associates |  |  |  |  |  |  |  |  | $ 18,000 |  |  |  | $ 56,000 |  |  |  |
Proportion of ownership interest in joint venture | 90.00% |  |  |  |  |  |  |  | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% |
Investments |  |  |  | 0 |  |  |  |  | $ 0 |  |  |  | $ 0 |  |  |  | $ 0
Weichai Ballard JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in loss of investment in joint venture and associates |  |  |  |  |  |  |  |  | $ 11,599,000 |  |  |  | $ 16,084,000 |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  |  |  |  | 49.00% | 49.00% | 49.00% | 49.00% | 49.00% | 49.00% | 49.00% | 49.00% |
Contributions |  |  |  |  |  |  |  |  | $ 9,272,000 | ¥ 62,475 |  |  | $ 12,351,000 | ¥ 79,625 |  |  |
Investments |  |  |  | 28,982,000 |  |  |  |  | $ 24,026,000 |  |  |  | 28,982,000 |  |  |  | $ 27,561,000
Synergy Ballard JVCo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  |  |  |  | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |
Contributions |  |  |  |  |  |  |  |  | $ 0 |  |  |  | 0 |  |  |  |
Investments |  |  |  | 0 |  |  |  |  | 0 |  |  |  | 0 |  |  |  |
Forsee Power |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  | 9.77% |  |  |  |  |  |  |  |  |  |  |
Investments |  |  |  | 33,335,000 |  |  |  |  | 18,470,000 |  |  |  | 33,335,000 |  |  |  |
Foreign exchange gain (loss) |  |  |  |  |  |  |  |  | (14,865,000) |  |  |  | (10,474,000) |  |  |  |
Forsee Power | Subsequent Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  |  |  | 33,335,000 |  |  |  |  | 18,470,000 |  |  |  | 33,335,000 |  |  |  |
Hydrogen Funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange gain (loss) |  |  |  |  |  |  |  |  | (580,000) |  |  |  | 1,000 |  |  |  |
HyCap Fund |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  |  |  |  |  | $ 9,534,000 | £ 7,215 |  |  |  | £ 7,215 |  |  |  |  |
Investments |  |  |  | 7,636,000 |  |  |  |  | 7,963,000 |  |  |  | 7,636,000 |  |  |  |
HyCap Fund | Initial Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  |  |  |  |  |  |  | 1,924,000 |  |  | £ 1,550 | 7,610,000 |  |  | £ 5,665 |
HyCap Fund | Subsequent Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  |  |  |  |  |  |  | 1,597,000 |  |  |  | 26,000 |  |  |  |
Investments |  |  |  | 7,636,000 |  |  |  |  | 7,963,000 |  |  |  | 7,636,000 |  |  |  |
CleanH2 Fund |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  |  | 1,144,000 | € 996 |  |  |  |  |  | € 996 |  |  |  |  |  |
Investments |  |  |  | 339,000 |  |  |  |  | 565,000 |  |  |  | 339,000 |  |  |  |
CleanH2 Fund | Initial Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  |  |  |  |  |  |  | 806,000 |  | € 696 |  | 338,000 |  | € 300 |  |
CleanH2 Fund | Subsequent Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  |  |  | 339,000 |  |  |  |  | 565,000 |  |  |  | 339,000 |  |  |  |
Wisdom Motor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  | 7.169% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  |  | $ 10,000,000 | 0 |  |  |  |  | 10,000,000 |  |  |  | 0 |  |  |  |
Foreign exchange gain (loss) |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Wisdom Motor | Subsequent Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |
Quantron AG |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  | 1.89% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  | € 5,000 |  | $ 0 |  |  |  |  | 5,333,000 |  |  |  | $ 0 |  |  |  |
Foreign exchange gain (loss) |  |  |  |  |  |  |  |  | 150,000 |  |  |  |  |  |  |  |
Quantron AG | Subsequent Contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |  | $ 5,333,000 |  |  |  |  |  |  |  |

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