Post-employment benefits - Disclosure of Fair Value of Plan Assets (Details) - EUR (€) € in Thousands	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Employee Benefits [Abstract]
Insurance contracts	€ 9,173	€ 10,130	€ 9,320
Total	€ 9,173	€ 10,130	€ 9,320
Insurance contracts, allocation percentage	100.00%	100.00%	100.00%
Total, allocation percentage	100.00%	100.00%	100.00%

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2021-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_PlanAssetsAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant