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Fair value of assets and liabilities - Methods applied in determining fair values of financial assets and liabilities (carried at amortised cost) (Detail) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks | € 21,770 | € 16,709
Loans and advances to customers 7 | 683,611 | 647,313
Deposits from banks | 16,723 | 23,257
Customer deposits | 691,661 | 650,276
Debt securities in issue2 | 142,367 | 124,670
Subordinated loans | 17,878 | 15,401
Financial liabilities |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Deposits from banks | 16,499 | 22,799
Customer deposits | 691,287 | 649,609
Debt securities in issue2 | 142,905 | 125,253
Subordinated loans | 18,357 | 15,361
Financial liabilities | 869,048 | 813,022
Financial liabilities | Level 1 |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Deposits from banks |  |
Customer deposits |  |
Debt securities in issue2 | 79,254 | 62,197
Subordinated loans | 17,968 | 15,050
Financial liabilities | 97,221 | 77,248
Financial liabilities | Level 2 |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Deposits from banks | 8,208 | 15,066
Customer deposits | 61,916 | 52,486
Debt securities in issue2 | 61,651 | 42,606
Subordinated loans | 389 | 311
Financial liabilities | 132,164 | 110,469
Financial liabilities | Level 3 |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Deposits from banks | 3,943 | 3,968
Customer deposits | 46,984 | 41,063
Debt securities in issue2 | 2,000 | 20,450
Subordinated loans |  |
Financial liabilities | 52,927 | 65,482
Financial liabilities | Carrying Amount |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Deposits from banks | 16,723 | 23,257
Customer deposits | 691,661 | 650,276
Debt securities in issue2 | 142,367 | 124,670
Subordinated loans | 17,878 | 15,401
Financial liabilities | 868,630 | 813,603
Financial liabilities | Carrying amount presented as fair value |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Deposits from banks | 4,348 | 3,764
Customer deposits | 582,387 | 556,060
Debt securities in issue2 |  |
Subordinated loans |  |
Financial liabilities | 586,735 | 559,824
Financial Assets |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks | 21,766 | 16,662
Loans and advances to customers 7 | 667,410 | 623,381
Securities at amortised cost | 48,303 | 46,010
Financial assets | 737,479 | 686,053
Financial Assets | Level 1 |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks |  |
Loans and advances to customers 7 |  |
Securities at amortised cost | 42,871 | 40,041
Financial assets | 42,871 | 40,041
Financial Assets | Level 2 |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks | 15,614 | 11,430
Loans and advances to customers 7 | 18,626 | 14,602
Securities at amortised cost | 2,908 | 4,277
Financial assets | 37,149 | 30,308
Financial Assets | Level 3 |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks | 2,957 | 2,511
Loans and advances to customers 7 | 630,493 | 593,098
Securities at amortised cost | 2,523 | 1,693
Financial assets | 635,973 | 597,302
Financial Assets | Carrying Amount |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks | 21,770 | 16,709
Loans and advances to customers 7 | 683,611 | 647,313
Securities at amortised cost | 50,273 | 48,313
Financial assets | 755,655 | 712,335
Financial Assets | Carrying amount presented as fair value |  |
Disclosure of fair value measurement of assets and liabilities [Line Items] |  |
Loans and advances to banks | 3,195 | 2,722
Loans and advances to customers 7 | 18,291 | 15,681
Securities at amortised cost |  |
Financial assets | € 21,486 | € 18,403

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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: Classes of financial instruments [domain]; Financial liabilities] + 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35M&doctype=Standard -URIDate 2024-03-27 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35N&doctype=Standard -URIDate 2024-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35I&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) 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 deliver 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, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are 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. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]] + 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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