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Significant accounting policies - Share-based compensation (Details) - Performance shares | 12 Months Ended
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Dec. 31, 2022 performanceFactor
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 3 years
Number of performance factors | 2
Return on capital employed average period | 3 years
Bottom of range |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Share-based compensation arrangement vesting rights, percentage | 0.00%
Top of range |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Share-based compensation arrangement vesting rights, percentage | 200.00%

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- Details
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