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Derivative financial instruments - Derivative Risk (Details) - Cash Flow Hedges - EUR (€) € in Millions | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Disclosure of detailed information about hedges [line items] |  |
Hedge ineffectiveness recognized in profit or loss |  | € (407.2)
Foreign currency risk |  |
Disclosure of detailed information about hedges [line items] |  |
Hedge ineffectiveness recognized in profit or loss | € 40.0 |
Commodity risk |  |
Disclosure of detailed information about hedges [line items] |  |
Hedge ineffectiveness recognized in profit or loss | € 447.0 |

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- 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
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- 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
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- Details
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- Details
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- Details
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