Financial instruments - Fair value and risk management - Amounts reclassified from OCI to capitalized cost of aircraft additions (Details) - EUR (€) € in Millions	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Disclosure of detailed information about hedging instruments [line items]
Amounts reclassified from other comprehensive income into capitalized cost of aircraft additions within property, plant and equipment	€ (308.1)	€ 78.1	€ 5.0
Property, plant and equipment - aircraft additions
Disclosure of detailed information about hedging instruments [line items]
Amounts reclassified from other comprehensive income into capitalized cost of aircraft additions within property, plant and equipment	€ (308.1)	€ 78.1	€ 5.0

The amounts removed from equity and included in the initial cost or other carrying amount of a non-financial asset (liability) whose acquisition or incurrence was a hedged, highly probable forecast transaction, before tax. [Refer: Carrying amount [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 23
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_e&doctype=Standard&book=b
-URIDate 2022-03-24

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration