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Financial assets at fair value through other comprehensive income - Summary of changes in fair value through other comprehensive income financial assets (Details) - - Financial assets at fair value through other comprehensive income - EUR (€) € in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Disclosure of financial assets [line Items] |  |
Opening balance as at 1 January | € 41,116 | € 31,625
Additions | 11,040 | 19,995
Amortisation |  | 31
Transfers and reclassifications |  | 5
Changes in unrealised revaluations | (179) | 725
Impairments |  | (1)
Reversals of impairments | 4 | 6
Disposals and redemptions | (5,915) | (11,913)
Exchange rate differences | 273 | 651
Changes in the composition of the group and other changes | 5 | (6)
Closing balance | 46,343 | 41,116
FVOCI equity securities |  |
Disclosure of financial assets [line Items] |  |
Opening balance as at 1 January | 1,885 | 1,887
Additions | 3 | 28
Amortisation |  |
Transfers and reclassifications |  | 5
Changes in unrealised revaluations | 462 | 68
Impairments |  |
Reversals of impairments |  |
Disposals and redemptions |  | (2)
Exchange rate differences | 14 | (100)
Changes in the composition of the group and other changes |  |
Closing balance | 2,364 | 1,885
FVOCI debt instruments |  |
Disclosure of financial assets [line Items] |  |
Opening balance as at 1 January | 39,231 | 29,739
Additions | 11,037 | 19,967
Amortisation |  | 31
Transfers and reclassifications |  |
Changes in unrealised revaluations | (641) | 657
Impairments |  | (1)
Reversals of impairments | 4 | 6
Disposals and redemptions | (5,915) | (11,912)
Exchange rate differences | 259 | 751
Changes in the composition of the group and other changes | 5 | (6)
Closing balance | € 43,979 | € 39,231

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- Definition The decrease in financial assets resulting from write-off. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph IG20B -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_IG20B&doctype=Implementation%20Guidance -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35M&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I&doctype=Standard -URIDate 2023-03-23 + Details
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