Derivative financial instruments - Derivative arrangements (Details) - EUR (€) € in Millions	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	€ (558.8)	€ 338.5	€ (391.3)
Current derivative assets	293.2	308.7	212.1
Current derivative liabilities	1,050.0	189.7	190.5
Gains (losses) on cash flow hedges, net of tax	197.4	325.5	(809.5)
Derivative financial assets	671.7	536.2	214.7
Derivative financial liabilities	1,230.5	197.7	606.0
Fuel and oil operating expenses
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	1,228.0
Interest rate swaps
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	8.0	4.0	(6.7)
Interest rate swaps \| Less than one year
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	2.0	1.7	(0.7)
Interest rate swaps \| Between one and five years
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	6.0	2.3	(6.0)
Foreign currency forward contracts
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	661.5	519.7	(594.4)
Gains (losses) on ineffectiveness of cash flow hedges recognised in profit or loss	0.0	0.0	0.0
Foreign currency forward contracts \| Less than one year
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	289.0	307.0	(187.4)
Foreign currency forward contracts \| Between one and five years
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	372.5	212.7	(407.0)
Commodity forward contracts
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	(1,228.3)	(185.2)	209.8
Derivative financial liabilities	1,228.0
Commodity forward contracts \| Less than one year
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	(1,047.8)	(189.7)	€ 209.8
Commodity forward contracts \| Between one and five years
Disclosure of detailed information about financial instruments [line items]
Net Derivative financial instrument asset (liability)	(180.5)	€ 4.5
Cross currency interest rate swap contract
Disclosure of detailed information about financial instruments [line items]
Gains (losses) on ineffectiveness of cash flow hedges recognised in profit or loss	0.0
Cash Flow Hedges
Disclosure of detailed information about financial instruments [line items]
Gains (losses) on ineffectiveness of cash flow hedges recognised in profit or loss	(407.2)
Cash Flow Hedges \| Fuel and oil operating expenses \| Discontinued Hedges
Disclosure of detailed information about financial instruments [line items]
Gains (losses) on cash flow hedges, net of tax	€ 392.0

The amount of current derivative financial assets. [Refer: Derivative financial assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard
-URIDate 2019-03-27

+ Details

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

- Definition

The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]

+ References

+ Details

Name:	ifrs-full_CurrentDerivativeFinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

+ Details

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

- Definition

The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

+ Details

Name:	ifrs-full_DerivativeFinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 24C
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24C_b_i&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 24E
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24E_a&doctype=Standard
-URIDate 2019-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 91
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard
-URIDate 2019-03-27

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 23
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_c&doctype=Standard&book=b
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_GainsLossesOnCashFlowHedgesNetOfTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The gains (losses) on the ineffective portion of cash flow hedges recognised in profit or loss. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 24
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_24_b&doctype=Standard&book=b
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_GainsLossesOnIneffectivenessOfCashFlowHedgesRecognisedInProfitOrLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of net financial assets and (liabilities) classified as derivative instruments.

+ References

No definition available.

+ Details

Name:	ryaay_DerivativeFinancialAssetsLiabilitiesNet
Namespace Prefix:	ryaay_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ryaay_FuelAndOilInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_InterestRateSwapContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ryaay_ForeignCurrencyForwardContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ryaay_CommodityForwardContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ryaay_CrossCurrencyInterestRateSwapContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfHedgesAxis=ifrs-full_CashFlowHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=ryaay_DiscontinuedHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: