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Equity - Other reserves additional information (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reserve of gain loss FVOCI |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | € 664 | € (35) | € (118)
Reserve of gain loss FVOCI | Bank Of Beijing |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 652 | (24) | € (86)
Reserve of cash flow hedges |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 365 | € 997 |
Unrealised Revaluations And Exchange Rate Differences |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 541 |  |
Currency translation reserve | US Dollar |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 354 |  |
Currency translation reserve | Turkish Lira |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 148 |  |
Currency translation reserve | Turkish Lira | IAS 29 |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 202 |  |
Currency translation reserve | British Pound |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 75 |  |
Currency translation reserve | Polish Zloty |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 18 |  |
Currency translation reserve | Swiss Franc |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | (10) |  |
Currency translation reserve | Australian Dollar |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | (35) |  |
Currency translation reserve | Russian Rouble |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | (47) |  |
Currency translation reserve | Thai Baht |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 31 |  |
Currency translation reserve | Chinese Yuan |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | 3 |  |
Currency translation reserve | Other currency |  |  |
Disclosure of equity [Line Items] |  |  |
Unrealised revaluations | € 4 |  |

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- Definition The increase (decrease) in equity. [Refer: Equity] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
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