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Financial risk management - D.1.2. Currency and interest rate swap contracts (Details) $ in Millions, kr in Billions, $ in Billions | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Jan. 31, 2023 COP ($) | Jan. 10, 2022 USD ($) | Jan. 10, 2022 SEK (kr)
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Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Derivative financial liabilities | $ 23.0 | $ 59.0 |  |  |
Cash flow hedges |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Derivative financial liabilities | 23.0 | 59.0 |  |  |
Interest rate swap | Interest rate risk |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Derivative financial liabilities held for hedging | 9.0 | 59.0 |  |  |
Currency swap contract | Cash flow hedges |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Derivative notional amount |  |  | $ 206 |  |
Derivative financial liabilities held for hedging | $ 14.0 | $ 0.0 |  |  |
SEK Senior Unsecured Variable Rate Notes Due 2027 |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Derivative notional amount |  |  |  | $ 252.3 | kr 2.2

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