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Trade and other receivables (Details) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Trade and other receivables    
Trade receivables $ 224,000,000 $ 181,000,000
Other receivables and prepayments 106,000,000 96,000,000
Related party receivables (note 27) 2,000,000 1,000,000
Trade and other receivables 332,000,000 278,000,000
Value added tax recoverable 45,000,000 36,000,000
Non-financial assets $ 53,000,000 $ 46,000,000