Consolidated Statement of Changes in Equity (Parenthetical) - shares	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Statement [LineItems]
Shares transferred for exercise option	2,599,183	4,351,775	1,101,217
Treasury shares [member]
Statement [LineItems]
Treasury shares held	27,353,853	23,097,216	13,728,607

The number of shares in the entity held by the entity or by its subsidiaries or associates. [Refer: Associates [member]; Subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 79
-Subparagraph a
-Clause vi
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_vi&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant