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Deposits from banks - Additional information (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of deposits from banks [Line Items] |  |
Deposits from banks | € 16,723 | € 23,257
TLTRO |  |
Disclosure of deposits from banks [Line Items] |  |
Deposits from banks |  | € 6,000

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- Definition The amount of deposit liabilities from banks held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DepositsFromBanks
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Disclosure of deposits from banks [Line Items] + References No definition available. + Details
Name: | ing_DisclosureOfDepositsFromBanksLineItems
Namespace Prefix: | ing_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_BorrowingsByNameAxis=ing_TargetedLongerTermRefinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |