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Significant accounting policies (Details) ¥ in Thousands, $ in Thousands |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 13, 2018 CNY (¥) | Nov. 13, 2018 USD ($) | Jan. 10, 2017 | Jan. 05, 2017 | Jan. 04, 2017 | Sep. 26, 2016 CNY (¥) | Sep. 26, 2016 USD ($) | Jul. 19, 2016 | Jan. 18, 2010 | Mar. 31, 2017 CNY (¥) | Mar. 31, 2017 USD ($) | Dec. 31, 2021 CNY (¥) seat contribution | Dec. 31, 2021 USD ($) seat contribution | Dec. 31, 2020 CNY (¥) contribution | Dec. 31, 2020 USD ($) contribution | Dec. 31, 2019 CNY (¥) contribution | Dec. 31, 2019 USD ($) contribution | Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2012 | Aug. 31, 2010
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of capital contributions made | contribution |  |  |  |  |  |  |  |  |  |  |  | 4 | 4 | 4 | 4 | 2 | 2 |  |  |  |
Property | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets, useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 1 year | 1 year |  |  |  |  |  |  |  |
Property | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets, useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 7 years | 7 years |  |  |  |  |  |  |  |
Equipment | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets, useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |
Equipment | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets, useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
Vehicle | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets, useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 1 year | 1 year |  |  |  |  |  |  |  |
Vehicle | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use assets, useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
Acquired patents, know-how and in-process research & development | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
Acquired patents, know-how and in-process research & development | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 20 years | 20 years |  |  |  |  |  |  |  |
ERP management reporting software system | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
ERP management reporting software system | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |
Acquired customer contracts and relationships | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 7 years | 7 years |  |  |  |  |  |  |  |
Acquired customer contracts and relationships | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |
Acquired non-compete agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |
Acquired non-compete agreements | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 1 year | 1 year |  |  |  |  |  |  |  |
Domain names |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 15 years | 15 years |  |  |  |  |  |  |  |
Acquired trademarks and service marks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 15 years | 15 years |  |  |  |  |  |  |  |
Internally generated fuel cell intangible assets | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |
Internally generated fuel cell intangible assets | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles, useful life (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
Computer equipment | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |
Computer equipment | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |
Furniture and fixtures | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
Furniture and fixtures | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |
Production and test equipment | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |
Production and test equipment | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives (in years) |  |  |  |  |  |  |  |  |  |  |  | 15 years | 15 years |  |  |  |  |  |  |  |
Synergy Ballard JVCo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  | 10.00% | 10.00% |  |  |  |  | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |  |
Capital contributions |  |  |  |  |  |  |  |  |  | ¥ 6,700 | $ 971 |  |  |  |  |  |  |  |  |  |
Synergy Ballard JVCo | Synergy Ballard JVCo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  | 90.00% | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contributions |  |  |  |  |  | ¥ 60,300 | $ 9,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ballard Motive Solutions (Note 7) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 0.00% | 0.00% |  |  |  |  |  |
Guangzhou Ballard Power Systems Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  | 100.00% |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00% | 100.00% |  |  |  |  |  |
Ballard Power Systems Europe A/S |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  | 100.00% |  |  |  |  | 45.00% |  |  | 100.00% | 100.00% | 100.00% | 100.00% |  |  |  |  |  |
Additional interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 7.00%
Ballard Power Systems Europe A/S | Dansk Industri Invest A/S |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  | 43.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ballard Hong Kong Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  |  |  | 100.00% |  |  |  | 100.00% | 100.00% | 100.00% | 100.00% |  |  |  |  |  |
Ballard Unmanned Systems (note 8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00% | 100.00% |  |  |  |  |  |
Ballard Services Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 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% | 100.00% | 100.00% |  |  |  |  |  |
Ballard Power Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00% | 100.00% |  |  |  |  |  |
Weichai Ballard JV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture | 49.00% | 49.00% |  |  |  |  |  |  |  |  |  | 49.00% | 49.00% | 49.00% | 49.00% |  |  |  |  |  |
Expected contributions to acquire interests in joint venture | ¥ 539,000 | $ 79,930 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash contribution term (years) | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contributions |  |  |  |  |  |  |  |  |  |  |  | ¥ 79,625 | $ 12,351 | ¥ 155,575 | $ 22,515 | ¥ 143,325 | $ 20,944 | ¥ 98,000 | $ 14,286 |  |
Number of board seats |  |  |  |  |  |  |  |  |  |  |  | 5 | 5 |  |  |  |  |  |  |  |
Weichai Ballard JV | Weichai Power |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture | 51.00% | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected contributions to acquire interests in joint venture | ¥ 561,000 | $ 88,301 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of board seats held |  |  |  |  |  |  |  |  |  |  |  | 3 | 3 |  |  |  |  |  |  |  |

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