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Contingent liabilities and legal proceedings - Tax (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Brazil | Maximum | Tax contingent liability  
Disclosure of contingent liabilities [line items]  
Potential liability $ 934
India  
Disclosure of contingent liabilities [line items]  
Receivable for protest payments 149
Receivable for protest payments, corporate taxes 137
Receivable for protest payments, indirect taxes 12
India | Maximum | Tax contingent liability  
Disclosure of contingent liabilities [line items]  
Potential liability $ 115