Provision for de-characterization of dam structures and asset retirement obligations (Details Narrative) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Provision For De-characterization Of Dam Structures And Asset Retirement Obligations
Losses in relation to the operational stoppage	$ 42	$ 152	$ 218

The amount of losses incurred by the entity relating to its interests in structured entities. [Refer: Total for all unconsolidated structured entities [member]]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph B26
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B26_b&doctype=Appendix&subtype=B
-URIDate 2024-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration