Provisions - Summary of Activity for Provision for Warranty and Other Provisions (Parenthetical) (Detail) - INR (₨) ₨ in Millions	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Disclosure of other provisions [line items]
Additional provision during the year	₨ 1,067	₨ 1,280
Onerous Contracts-Cost of Fulfilling Contract [member]
Disclosure of other provisions [line items]
Additional provision during the year		₨ 51

The amount of additional other provisions made. [Refer: Other provisions]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2023-01-01
-Paragraph 84
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2023-en-r&anchor=para_84_b&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_AdditionalProvisionsOtherProvisions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration