Operating loans and long-term debt - Schedule of long-term debt (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | $ 371 | $ 265 |
| Less: current portion | 0 | (200) |
| Long-term debt | 300 | 0 |
| Term loan due May 2028; floating interest rate | Gross carrying amount | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | 300 | 200 |
| Long-term borrowings | Gross carrying amount | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | $ 300 | $ 200 |