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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, 2025 EUR (€) € / shares | Dec. 31, 2024 EUR (€) € / shares | Dec. 31, 2023 EUR (€)
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | € 152,486 | € 137,580 |
Financial assets at fair value through other comprehensive income | 49,846 | 46,389 |
Financial liabilities at fair value through profit or loss | 93,524 | 86,900 |
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 | 11,157 | 10,734 |
Financial assets at fair value through other comprehensive income | 440 | 270 |
Total financial assets | 11,597 | 11,005 | € 9,118
Financial liabilities at fair value through profit or loss | 613 | 770 |
Financial liabilities, at fair value | 613 | 770 | € 729
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 | 2,580 | 3,504 |
Financial liabilities at fair value through profit or loss | 10 | 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 | 145 | 141 |
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 | 1,950 | 1,565 |
Financial liabilities at fair value through profit or loss | 0 | 0 |
Level 3 | (Reverse) repos |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial assets at fair value through profit or loss | 5,783 | 5,050 |
Level 3 | Structured notes |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Financial liabilities at fair value through profit or loss | 53 | 67 |
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 | 494 | 413 |
Financial liabilities at fair value through profit or loss | 477 | 389 |
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 | 5 | 6 |
Financial liabilities at fair value through profit or loss | 4 | 8 |
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 | 181 | 39 |
Financial liabilities at fair value through profit or loss | 33 | 241 |
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 | 7 | 10 |
Financial liabilities at fair value through profit or loss | 21 | 47 |
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 | 6 |
Financial liabilities at fair value through profit or loss | 15 | 9 |
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 | 156 |  |
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 | € 283 | € 270 |
Level 3 | Minimum | Price based | Debt securities | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0 | 0 |
Level 3 | Minimum | Price based | Debt securities | Price (price per share) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price (in EUR per share) | € / shares | 417 | 327 |
Level 3 | Minimum | Price based | Equity securities | Price (price per share) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price (in EUR per share) | € / shares | 0 | 0 |
Level 3 | Minimum | Price based | Loans and advances | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0 | 0 |
Level 3 | Minimum | Price based | Structured notes | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.94 | 0.93 |
Level 3 | Minimum | Price based | Derivative at credit | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.94 | 0 |
Level 3 | Minimum | Price based | Other derivatives | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 67 | 68 |
Level 3 | Minimum | Price based | Equity at FVOCI | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 1.22 |
Level 3 | Minimum | Price based | Equity at FVOCI | Price (price per share) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price (in EUR per share) | € / shares | 125.74 |  |
Level 3 | Minimum | Present value techniques | Debt securities | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.96 | 0.96 |
Level 3 | Minimum | Present value techniques | Loans and advances | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1 |  |
Level 3 | Minimum | Present value techniques | Loans and advances | Credit spread (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0628 | 0.0576 |
Level 3 | Minimum | Present value techniques | Loans and advances | Prepayment rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 0.02 |
Level 3 | Minimum | Present value techniques | (Reverse) repos | Interest rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 0.02 |
Level 3 | Minimum | Present value techniques | Structured notes | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1 |  |
Level 3 | Minimum | Present value techniques | Structured notes | Prepayment rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 0.9959 |
Level 3 | Minimum | Present value techniques | Derivatives at rates | Reset spread (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 0.02 |
Level 3 | Minimum | Present value techniques | Derivative at credit | Credit spread (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0008 | 0 |
Level 3 | Minimum | Present value techniques | Equity at FVOCI | Credit spread (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.000552 | 0.000567 |
Level 3 | Minimum | Present value techniques | Equity at FVOCI | Interest rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.035 | 0.015 |
Level 3 | Minimum | Present value techniques | Equity at FVOCI | Payout ratio (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.70 | 0.70 |
Level 3 | Minimum | Option pricing model | Structured notes | Equity volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.16 |  |
Level 3 | Minimum | Option pricing model | Structured notes | Equity/Equity correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.6 | 0.7 |
Level 3 | Minimum | Option pricing model | Structured notes | Equity/FX correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | (0.2) |  |
Level 3 | Minimum | Option pricing model | Structured notes | Dividend yield (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.037 |  |
Level 3 | Minimum | Option pricing model | Derivatives at rates | Interest rate volatility (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0064 |  |
Level 3 | Minimum | Option pricing model | Derivatives at foreign exchange | Implied volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 0.02 |
Level 3 | Minimum | Option pricing model | Derivatives at equity | Equity volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.07 | 0.07 |
Level 3 | Minimum | Option pricing model | Derivatives at equity | Equity/Equity correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0 | 0.0 |
Level 3 | Minimum | Option pricing model | Derivatives at equity | Equity/FX correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | (0.6) | (0.6) |
Level 3 | Minimum | Option pricing model | Derivatives at equity | Dividend yield (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0 | 0 |
Level 3 | Minimum | Option pricing model | Other derivatives | Commodity volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.15 | 0.131 |
Level 3 | Minimum | Option pricing model | Other derivatives | Com/FX correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | (0.25) | (0.40) |
Level 3 | Maximum | Price based | Debt securities | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1.08 | 1.20 |
Level 3 | Maximum | Price based | Debt securities | Price (price per share) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price (in EUR per share) | € / shares | 1,325 | 520 |
Level 3 | Maximum | Price based | Equity securities | Price (price per share) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price (in EUR per share) | € / shares | 5,475 | 5,475 |
Level 3 | Maximum | Price based | Loans and advances | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1.05 | 1.07 |
Level 3 | Maximum | Price based | Structured notes | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1.03 | 1.04 |
Level 3 | Maximum | Price based | Derivative at credit | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1 | 1 |
Level 3 | Maximum | Price based | Other derivatives | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 67 | 68 |
Level 3 | Maximum | Price based | Equity at FVOCI | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 1.22 |
Level 3 | Maximum | Price based | Equity at FVOCI | Price (price per share) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, price (in EUR per share) | € / shares | 125.74 |  |
Level 3 | Maximum | Present value techniques | Debt securities | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.99 | 1 |
Level 3 | Maximum | Present value techniques | Loans and advances | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1 |  |
Level 3 | Maximum | Present value techniques | Loans and advances | Credit spread (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0707 | 0.0629 |
Level 3 | Maximum | Present value techniques | Loans and advances | Prepayment rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 1 |
Level 3 | Maximum | Present value techniques | (Reverse) repos | Interest rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 0.02 |
Level 3 | Maximum | Present value techniques | Structured notes | Price (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1 |  |
Level 3 | Maximum | Present value techniques | Structured notes | Prepayment rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage |  | 1.0009 |
Level 3 | Maximum | Present value techniques | Derivatives at rates | Reset spread (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.02 | 0.02 |
Level 3 | Maximum | Present value techniques | Derivative at credit | Credit spread (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0094 | 0.0091 |
Level 3 | Maximum | Present value techniques | Equity at FVOCI | Credit spread (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.000552 | 0.000576 |
Level 3 | Maximum | Present value techniques | Equity at FVOCI | Interest rate (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.035 | 0.035 |
Level 3 | Maximum | Present value techniques | Equity at FVOCI | Payout ratio (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.90 | 0.90 |
Level 3 | Maximum | Option pricing model | Structured notes | Equity volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.46 |  |
Level 3 | Maximum | Option pricing model | Structured notes | Equity/Equity correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.7 | 0.7 |
Level 3 | Maximum | Option pricing model | Structured notes | Equity/FX correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0 |  |
Level 3 | Maximum | Option pricing model | Structured notes | Dividend yield (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.043 |  |
Level 3 | Maximum | Option pricing model | Derivatives at rates | Interest rate volatility (bps) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.0280 |  |
Level 3 | Maximum | Option pricing model | Derivatives at foreign exchange | Implied volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.41 | 0.15 |
Level 3 | Maximum | Option pricing model | Derivatives at equity | Equity volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.76 | 0.81 |
Level 3 | Maximum | Option pricing model | Derivatives at equity | Equity/Equity correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1.0 | 1.0 |
Level 3 | Maximum | Option pricing model | Derivatives at equity | Equity/FX correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.3 | 0.6 |
Level 3 | Maximum | Option pricing model | Derivatives at equity | Dividend yield (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 1 | 0.33 |
Level 3 | Maximum | Option pricing model | Other derivatives | Commodity volatility (%) |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | 0.93 | 0.61 |
Level 3 | Maximum | Option pricing model | Other derivatives | Com/FX correlation |  |  |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |  |  |
Significant unobservable inputs, percentage | (0.25) | (0.25) |

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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 2024-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard -URIDate 2024-03-27 + 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 2024-01-01 -Paragraph 8 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_a&doctype=Standard -URIDate 2024-03-27 + 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 2024-01-01 -Paragraph 8 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_e&doctype=Standard -URIDate 2024-03-27 + Details
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