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Derivative financial instruments and market risks - Summary of Fair Value of Derivative Instruments (Details) - EUR (€) € in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Disclosure of Credit Risk Exposure [Line Items] |  |  |
Non-current assets | € 0 | € 0 | € 3
Current assets | 201 |  |
Total assets | 201 |  |
Non-current liabilities | (164) | (232) | (6)
Current liabilities | (127) |  |
Total liabilities | (291) |  |
Market value | (90) | (120) | 213
Currency derivatives |  |  |
Disclosure of Credit Risk Exposure [Line Items] |  |  |
Non-current assets | 0 |  |
Current assets | 201 |  |
Total assets | 201 |  |
Non-current liabilities | 0 |  |
Current liabilities | (126) |  |
Total liabilities | (126) |  |
Market value | 75 | 112 | 222
operating |  |  |
Disclosure of Credit Risk Exposure [Line Items] |  |  |
Non-current assets | 0 |  |
Current assets | 67 |  |
Total assets | 67 |  |
Non-current liabilities | 0 |  |
Current liabilities | (45) |  |
Total liabilities | (45) |  |
Market value | 22 | 22 | 10
financial |  |  |
Disclosure of Credit Risk Exposure [Line Items] |  |  |
Non-current assets | 0 |  |
Current assets | 134 |  |
Total assets | 134 |  |
Non-current liabilities | 0 |  |
Current liabilities | (81) |  |
Total liabilities | (81) |  |
Market value | 53 | 90 | 212
Interest rate derivatives |  |  |
Disclosure of Credit Risk Exposure [Line Items] |  |  |
Non-current assets | 0 |  |
Current assets | 0 |  |
Total assets | 0 |  |
Non-current liabilities | (164) |  |
Current liabilities | (1) |  |
Total liabilities | (165) |  |
Market value | (165) | (232) | 7
Equity derivatives |  |  |
Disclosure of Credit Risk Exposure [Line Items] |  |  |
Non-current assets | 0 |  |
Current assets | 0 |  |
Total assets | 0 |  |
Non-current liabilities | 0 |  |
Current liabilities | 0 |  |
Total liabilities | 0 |  |
Market value | € 0 | € 0 | € (16)

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- Definition The amount of current derivative financial assets. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expired 2023-01-01 -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 22 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_b&doctype=Standard&book=b -URIDate 2023-03-23 + Details
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- Definition The amount of non-current derivative financial assets. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of non-current derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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