Revenue from contracts with customers and trade receivables (Details 8) - INR (₨) ₨ in Millions	Mar. 31, 2022	Mar. 31, 2021
Statement [Line Items]
Advance from customers	₨ 1,341	₨ 981
Contract liabilities	₨ 1,341	₨ 981

The amount of advances received representing contract liabilities for performance obligations satisfied at a point in time. [Refer: Contract liabilities; Performance obligations satisfied at point in time [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78&doctype=Standard
-URIDate 2021-03-24

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant