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Fair value of assets and liabilities - Valuation techniques and range of unobservable inputs (Details) € in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 EUR (€) € / shares | Dec. 31, 2023 EUR (€) € / shares | Dec. 31, 2022 EUR (€)
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 149,579 | € 123,015 |
Financial assets at fair value through other comprehensive income | 46,343 | 41,116 |
Financial liabilities at fair value through profit or loss | 102,649 | 94,638 |
Debt securities |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 42,647 | 38,281 |
Level 3 |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | 8,341 | 8,179 |
Financial assets at fair value through other comprehensive income | 740 | 938 |
Total financial assets | 9,081 | 9,118 | € 7,526
Financial liabilities at fair value through profit or loss | 564 | 729 |
Financial liabilities, at fair value | € 564 | € 729 | € 732
Level 3 | Debt securities | Price (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 68.00% |  |
Level 3 | Debt securities | Price (%) | Minimum | Loan Pricing Model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 99.00% |  |
Level 3 | Debt securities | Price (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 68.00% |  |
Level 3 | Debt securities | Price (%) | Maximum | Loan Pricing Model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 99.00% |  |
Level 3 | Debt securities | Price (price per share) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price | € / shares |  | 97 |
Level 3 | Debt securities | Price (price per share) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price | € / shares |  | 236 |
Level 3 | Debt securities | Credit spread (bps) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.0100 | 0.0094 |
Level 3 | Debt securities | Credit spread (bps) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.0100 | 0.0094 |
Level 3 | Loans and advances |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 1,838 | € 2,298 |
Financial liabilities at fair value through profit or loss |  | € 13 |
Level 3 | Loans and advances | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Loans and advances | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 106.00% | 117.00% |
Level 3 | Loans and advances | Credit spread (bps) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread |  | 0.0001 |
Level 3 | Loans and advances | Credit spread (bps) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread |  | 0.0012 |
Level 3 | Loans and advances | Interest rate (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 5.00% |  |
Level 3 | Loans and advances | Interest rate (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 5.00% |  |
Level 3 | Loans and advances | Prepayment rate (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 2.00% |  |
Level 3 | Loans and advances | Prepayment rate (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 2.00% |  |
Level 3 | (Reverse) repo's |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 3,441 | € 1,832 |
Level 3 | Structured notes |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | 2 |  |
Financial liabilities at fair value through profit or loss | € 14 | € 47 |
Level 3 | Structured notes | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 92.00% | 88.00% |
Level 3 | Structured notes | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 104.00% | 96.00% |
Level 3 | Structured notes | Credit spread (bps) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.0100 | 0.0100 |
Level 3 | Structured notes | Credit spread (bps) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.0100 | 0.0101 |
Level 3 | Structured notes | Equity volatility (%) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 9.00% |
Level 3 | Structured notes | Equity volatility (%) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 23.00% |
Level 3 | Structured notes | Equity/Equity correlation | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation |  | 0.8 |
Level 3 | Structured notes | Equity/Equity correlation | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation |  | 0.9 |
Level 3 | Structured notes | Equity/FX correlation | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation |  | (0.2) |
Level 3 | Structured notes | Equity/FX correlation | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation |  | 0.6 |
Level 3 | Structured notes | Dividend yield (%) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 0.00% |
Level 3 | Structured notes | Dividend yield (%) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 4.00% |
Level 3 | Derivatives at rates |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 292 | € 283 |
Financial liabilities at fair value through profit or loss | € 300 | € 301 |
Level 3 | Derivatives at rates | Interest rate volatility (bps) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread |  | 0.0001 |
Level 3 | Derivatives at rates | Interest rate volatility (bps) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread |  | 0.0003 |
Level 3 | Derivatives at rates | Prepayment rate (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Derivatives at rates | Prepayment rate (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Derivatives at rates | Reset spread (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 2.00% |  |
Level 3 | Derivatives at rates | Reset spread (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 2.00% |  |
Level 3 | Derivatives at foreign exchange |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 4 | € 2 |
Financial liabilities at fair value through profit or loss | € 3 | € 3 |
Level 3 | Derivatives at foreign exchange | Implied volatility (%) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 4.00% | 3.00% |
Level 3 | Derivatives at foreign exchange | Implied volatility (%) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 9.00% | 18.00% |
Level 3 | Derivative at credit |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 87 | € 216 |
Financial liabilities at fair value through profit or loss | € 220 | € 343 |
Level 3 | Derivative at credit | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Derivative at credit | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 100.00% | 100.00% |
Level 3 | Derivative at credit | Credit spread (bps) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0 | 0.0003 |
Level 3 | Derivative at credit | Credit spread (bps) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.0179 | 0.0149 |
Level 3 | Derivatives at equity |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 12 | € 20 |
Financial liabilities at fair value through profit or loss | € 22 | € 17 |
Level 3 | Derivatives at equity | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Derivatives at equity | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 21.00% | 21.00% |
Level 3 | Derivatives at equity | Equity volatility (%) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 13.00% | 12.00% |
Level 3 | Derivatives at equity | Equity volatility (%) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 76.00% | 75.00% |
Level 3 | Derivatives at equity | Equity/Equity correlation | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation | 0.0 | 0.2 |
Level 3 | Derivatives at equity | Equity/Equity correlation | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation | 1.0 | 1.0 |
Level 3 | Derivatives at equity | Dividend yield (%) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Derivatives at equity | Dividend yield (%) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 20.00% | 14.00% |
Level 3 | Derivatives at equity | Derivatives at equity | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation | (0.1) | (0.5) |
Level 3 | Derivatives at equity | Derivatives at equity | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs,correlation | 0.6 | 1.0 |
Level 3 | Other derivatives |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 13 | € 14 |
Financial liabilities at fair value through profit or loss | € 4 | € 7 |
Level 3 | Other derivatives | Commodity volatility (%) | Minimum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 13.00% | 11.00% |
Level 3 | Other derivatives | Commodity volatility (%) | Maximum | Option pricing model |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 74.00% | 94.00% |
Level 3 | Loan and advances at FVOCI |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | € 476 | € 676 |
Level 3 | Loan and advances at FVOCI | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 93.00% | 85.00% |
Level 3 | Loan and advances at FVOCI | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 100.00% | 96.00% |
Level 3 | Loan and advances at FVOCI | Prepayment rate (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 5.00% |  |
Level 3 | Loan and advances at FVOCI | Prepayment rate (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 5.00% |  |
Level 3 | Equity at FVOCI |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | € 254 | € 263 |
Level 3 | Equity at FVOCI | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 122.00% | 122.00% |
Level 3 | Equity at FVOCI | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 122.00% | 122.00% |
Level 3 | Equity at FVOCI | Credit spread (bps) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.00058 | 0.00052 |
Level 3 | Equity at FVOCI | Credit spread (bps) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, basis point spread | 0.00058 | 0.00052 |
Level 3 | Equity at FVOCI | Interest rate (%) | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 4.00% | 4.00% |
Level 3 | Equity at FVOCI | Interest rate (%) | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 4.00% | 4.00% |
Level 3 | Equity at FVOCI | Payout ratio | Minimum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 70.00% |  |
Level 3 | Equity at FVOCI | Payout ratio | Maximum | Present value techniques |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 90.00% |  |
Level 3 | Debt securities at FVOCI |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | € 10 |  |
Level 3 | Equity securities |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 127 | € 150 |
Level 3 | Equity securities | Price (price per share) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price | € / shares | 0 | 0 |
Level 3 | Equity securities | Price (price per share) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price | € / shares | 5,475 | 5,457 |
Level 3 | Debt securities |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 2,524 | € 3,364 |
Financial assets at fair value through other comprehensive income | € 10 | 0 |
Financial liabilities at fair value through profit or loss |  | € 0 |
Level 3 | Debt securities | Debt securities | Price (%) | Minimum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.00% | 0.00% |
Level 3 | Debt securities | Debt securities | Price (%) | Maximum | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 122.00% | 122.00% |

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + 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 + Details
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- Definition The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 8 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_8_h&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 8 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_8_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 8 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_8_e&doctype=Standard -URIDate 2023-03-23 + Details
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