Right of use assets & lease liabilities - Right of use assets (Details) € in Millions	12 Months Ended
Mar. 31, 2024 EUR (€)	Mar. 31, 2023 EUR (€) aircraft	Mar. 31, 2022 EUR (€)
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance	€ 209.1	€ 133.7	€ 188.2
Depreciation charge for the year	(65.2)	(84.0)	(54.5)
Additions	22.6	47.2
Modification of leases		112.2
Ending balance	€ 166.5	€ 209.1	€ 133.7
Airbus A320
Disclosure of quantitative information about right-of-use assets [line items]
Number of leased aircraft for which leasing term has been extended during the period \| aircraft		24

The amount of additions to right-of-use assets. [Refer: Right-of-use assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph h
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_h&doctype=Standard
-URIDate 2023-03-23

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_a&doctype=Standard
-URIDate 2023-03-23

+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph j
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_j&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 47
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_a&doctype=Standard
-URIDate 2023-03-23

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Number of leased aircraft for which leasing term has been extended during the period

+ References

No definition available.

+ Details

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- Definition

The amount of change in right of use assets related to modification of leases.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Details

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