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Financial instruments - financial and other risks - Market risk (Details) - Spot market rate risk - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items] |  |  |
Amount of changes in spot rate used for sensitivity analysis | $ 1,000 |  |
Impact on operating income (loss) due to increase (decrease) in spot rate in sensitivity analysis | $ 28,900,000 | $ 32,000,000.0 | $ 35,300,000

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