Financial instruments - Fair value - Level 3 instrument, narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Disclosure Of Financial Assets And Liabilities [Line Items]
Derivative financial assets	$ 20,402	$ 11,220
Fair value of Egypt gas supply contract derivative \| Level 3 of fair value hierarchy
Disclosure Of Financial Assets And Liabilities [Line Items]
Derivative financial assets	$ 20,400	$ 11,200

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_DerivativeFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant