Basis of preparation - Additional Information (Detail)	12 Months Ended
Mar. 31, 2025 INR (₨)
Basis Of Presentation [Abstract]
Description of presentation currency	INR
Exchange rate used by the entity to translate USD to reporting currency INR	85.43

The description of the currency in which the financial statements are presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 21
-IssueDate 2024-01-01
-Paragraph 53
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 51
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_51_d&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_DescriptionOfPresentationCurrency
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration