Share-based payment arrangements - Other Subsidiary Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Subsidiary Plans [Line Items]
Share-based payment expense	$ 13,950	$ 10,718	$ 14,468
Other not including Vedanta [Member] \| Stock Incentive Plan [Member]
Significant Subsidiary Plans [Line Items]
Share-based payment expense	$ 840	$ 420	$ 10

The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

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