Related party transactions - Summary of compensation of key management personnel (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Related party transactions [abstract] | |||
| Short-term employee benefits | $ 47 | $ 53 | $ 51 |
| Post-employment benefits | 1 | 1 | 1 |
| Other long-term employee benefits | 14 | 12 | 10 |
| Share-based payments | 30 | 29 | 29 |
| Total | $ 92 | $ 95 | $ 91 |
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- References No definition available.
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