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Fair value of financial instruments - Fair value measurement sensitivity to unobservable inputs (Details) | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Minimum of the year |  |  |
Disclosure of Fair value of financial instruments [Line Items] |  |  |
A significant increase would result in a lower fair value | 6.86% | 3.128% |
Minimum of the year | Level 3 | Volatility |  |  |
Disclosure of Fair value of financial instruments [Line Items] |  |  |
A significant increase would result in a lower fair value |  | 10.00% | 12.97%
Maximum of the year |  |  |
Disclosure of Fair value of financial instruments [Line Items] |  |  |
A significant increase would result in a lower fair value | 7.84% | 8.89% |
Maximum of the year | Level 3 | Volatility |  |  |
Disclosure of Fair value of financial instruments [Line Items] |  |  |
A significant increase would result in a lower fair value |  | 20.00% | 27.50%

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- References No definition available. + Details
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- Definition The percentage of a reasonably possible increase in an unobservable input used in fair value measurement of assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 13 -IssueDate 2021-01-01 -Paragraph 93 -Subparagraph h -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2021-en-r&anchor=para_93_h_ii&doctype=Standard -URIDate 2021-03-24 + Details
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