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Financial Assets and Financial Liabilities - Summary of Cash and Cash Equivalents (Details) - EUR (€) € in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Cash And Cash Equivalents [Line Items] |  |  |  |
Cash at banks and on hand | € 453.1 | € 1,325.2 |  |
Cash equivalents | 11,210.6 | 12,549.9 |  |
Total | 11,663.7 | 13,875.1 | € 1,692.7 | € 1,210.2
Bank deposits |  |  |  |
Cash And Cash Equivalents [Line Items] |  |  |  |
Cash equivalents | 2,589.5 | 9,401.0 |  |
Money market funds |  |  |  |
Cash And Cash Equivalents [Line Items] |  |  |  |
Cash equivalents | 7,446.1 | 3,148.9 |  |
Reverse Repo |  |  |  |
Cash And Cash Equivalents [Line Items] |  |  |  |
Cash equivalents | € 1,175.0 | € 0.0 |  |

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- Definition The amount of cash on hand and demand deposits. [Refer: Cash on hand] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph B13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_i&doctype=Standard -URIDate 2023-03-23 + Details
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