Suppliers and contractors (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
IfrsStatementLineItems [Line Items]
Related parties	$ 169	$ 171
Total trade and other current payables	5,240	4,461
Country of domicile [member]
IfrsStatementLineItems [Line Items]
Third parties	3,318	2,691
Foreign countries [member]
IfrsStatementLineItems [Line Items]
Third parties	$ 1,753	$ 1,599

The current amount of payment due to suppliers for goods and services used in entity's business. [Refer: Current liabilities; Trade payables]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 78
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 70
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_70&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant