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Contingent liabilities and commitments - Summary of contingent liabilities and commitments (Details) - EUR (€) € in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of contingent liabilities [line items] |  |
Contingent liabilities | € 42,821 | € 44,544
Guarantees issued by ING Groep N.V. | 197 | 336
Irrevocable facilities | 166,810 | 161,940
Contingent liabilities and commitments | 209,828 | 206,820
Contingent liabilities in respect of guarantees |  |
Disclosure of contingent liabilities [line items] |  |
Contingent liabilities | 27,894 | 28,859
Contingent liabilities in respect of irrevocable letters of credit |  |
Disclosure of contingent liabilities [line items] |  |
Contingent liabilities | 14,925 | 15,682
Contingent liabilities in respect of other |  |
Disclosure of contingent liabilities [line items] |  |
Contingent liabilities |  | € 3

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