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Fair value of assets and liabilities - Changes in level 3 financial liabilities (Details) - EUR (€) € in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Financial liabilities, class |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Unrealised gains on (losses) recognised in the statement of profit or loss | € 185 | € (72)
Level 3 |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Opening balance as at 1 January | 729 | 732
Realised gain/loss recognised in the statement of profit or loss during the period | (185) | 72
Additions | 138 | 142
Redemptions | (56) | (156)
Maturity/settlement | (21) | (30)
Transfers into Level 3 | 8 | 72
Transfers out of Level 3 | (49) | (102)
Exchange rate differences | 0 | 0
Closing balance | 564 | 729
Level 3 | Trading liabilities |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Opening balance as at 1 January | 382 | 229
Realised gain/loss recognised in the statement of profit or loss during the period | (129) | 224
Additions | 28 | 53
Redemptions | (4) | (102)
Maturity/settlement | (10) | (13)
Transfers into Level 3 | 6 | 40
Transfers out of Level 3 | (19) | (49)
Closing balance | 253 | 382
Level 3 | Non-trading derivatives |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Opening balance as at 1 January | 301 | 449
Realised gain/loss recognised in the statement of profit or loss during the period | (57) | (151)
Additions | 110 | 72
Redemptions | (52) | (53)
Maturity/settlement | (7) | (16)
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Exchange rate differences | 0 | 0
Closing balance | 296 | 301
Level 3 | Financial liabilities designated as at fair value through profit or loss |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Opening balance as at 1 January | 47 | 54
Realised gain/loss recognised in the statement of profit or loss during the period | 0 | (2)
Additions | 0 | 18
Redemptions | 0 | (2)
Maturity/settlement | (4) | (1)
Transfers into Level 3 | 2 | 32
Transfers out of Level 3 | (30) | (54)
Exchange rate differences | 0 | 0
Closing balance | 16 | 47
Level 3 | Liabilities Held For Trading |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Exchange rate differences | € 0 | € 0

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- Definition The gains (losses) recognised in profit or loss for assets measured at fair value that are attributable to the change in unrealised gains or losses relating to those assets held at the end of the reporting period. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_f&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The gains (losses) including exchange differences recognised in profit or loss on the fair value measurement of liabilities. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_e_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase in fair value measurement of liabilities resulting from issues of those liabilities. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_e_iii&doctype=Standard -URIDate 2023-03-23 + Details
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