Other Current & Non Current Assets - Summary of Research Tax Credit (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Research Tax Credit Receivable [Roll Forward] | ||
| Opening research tax credit receivable | $ 5.9 | $ 4.0 |
| + Other operating income | 3.1 | 5.6 |
| - Payment received | (4.3) | |
| - Adjustment and currency translation effect | (0.3) | 0.6 |
| Closing research tax credit receivable | 8.7 | 5.9 |
| Of which - Non-current portion | 0.0 | 0.0 |
| Of which - Current portion | $ 8.7 | $ 5.9 |