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Document and Entity Information
 12 Months Ended
Mar. 31, 2021
shares
Cover [Abstract]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Mar. 31, 2021
Document Transition Report false
Document Shell Company Report false
Entity Registrant Name Ryanair Holdings plc
Entity Common Stock, Shares Outstanding 0
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
ICFR Auditor Attestation Flag true
Entity Emerging Growth Company false
Entity Shell Company false
Entity Central Index Key 0001038683
Amendment Flag false
Current Fiscal Year End Date --03-31
Document Fiscal Year Focus 2021
Document Fiscal Period Focus FY