Finance income and expenses - Finance income (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Finance Income And Expenses [Abstract] | |||
| Interest income on debt instruments measured at amortized cost | $ 58.0 | $ 52.5 | $ 64.2 |
| Interest income on debt instruments at fair value through other comprehensive income | 74.1 | 67.9 | 78.0 |
| Profits reclassified to profit or loss on derecognition of debt instruments at fair value through other comprehensive income | 1.0 | ||
| Net foreign currency exchange rate differences | 28.8 | ||
| Total finance income | $ 133.1 | $ 149.2 | $ 142.2 |