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Fair value of assets and liabilities - Summary of valuation adjustment (Details) - EUR (€) € in Millions | 6 Months Ended | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | € (80) | € 87 |
Deferred Day One Profit or Loss |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | (105) |  | € (90)
Own credit adjustments |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | 18 |  | 34
Bid/Offer |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | (135) |  | (154)
Model Risk |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | (27) |  | (26)
CVA |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | (116) |  | (131)
DVA |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | 54 |  | 55
CollVA |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | (3) |  | (4)
FVA |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | (52) |  | (68)
Total Valuation Adjustments |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
– Revaluations | € (366) |  | € (385)

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- Definition Adjustments for fair value losses (gains) to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 20 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_20_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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