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Transfer of financial assets, assets pledged and received as collateral - Additional information (Details) - EUR (€) € in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of offsetting of financial liabilities [line items] |  |
Financial assets pledged | € 106,052 | € 126,682
Mandatory reserve deposits |  |
Disclosure of offsetting of financial liabilities [line items] |  |
Financial assets pledged | € 11,653 | € 11,108

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- Definition The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 14 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_14_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | ing_FinancialAssetsPledgedAsCollateralLineItems
Namespace Prefix: | ing_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_TypesOfFinancialLiabilitiesAxis=ing_MandatoryReserveDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |