Financial instruments - Financial instruments indexed to LIBOR (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about financial instruments [line items] | ||
| Debt | $ 371 | $ 265 |
| Term Loan | Financial instruments indexed to LIBOR | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Debt | 300 | |
| Interest rate swap contract | Financial instruments indexed to LIBOR | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Debt | 75 | |
| Derivatives | $ 0 |