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Transfer of financial assets, assets pledged and received as collateral - Schedule of financial assets received as collateral (Details) - EUR (€) € in Millions | Dec. 31, 2023 | Dec. 31, 2022
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– equity securities |  |
Financial assets received as collateral [Line Items] |  |
Total received collateral available for sale or repledge at fair value | € 33,234 | € 22,847
of which sold or repledged at fair value | 20,526 | 18,613
– debt securities |  |
Financial assets received as collateral [Line Items] |  |
Total received collateral available for sale or repledge at fair value | 119,908 | 103,723
of which sold or repledged at fair value | € 86,448 | € 66,636

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- Definition The fair value of collateral sold or repledged that was permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 15 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_15_b&doctype=Standard -URIDate 2023-03-23 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The amount of non-cash collateral assets (such as debt or equity instruments) provided to a transferee, for which the transferee has the right by contract or custom to sell or repledge the collateral. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2023-01-01 -Paragraph 3.2.23 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2023-en-r&anchor=para_3.2.23_a&doctype=Standard -URIDate 2023-03-23 + Details
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- References No definition available. + Details
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Namespace Prefix: | ing_
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Balance Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |