Risk management and financial instruments - Narrative (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Disclosure of risk management strategy related to hedge accounting [abstract] | |||
| Principal | $ 19,662,230 | $ 18,052,688 | |
| Fair value | 18,182,270 | $ 18,157,182 | |
| Purchase of cattle | $ 25,800,000 | $ 27,900,000 | |