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Structured entities - Covered bond programme (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of information about consolidated structured entities [line items] |  |
Fair value pledged mortgage loans | € 55,524 | € 57,096
Dutch Covered Bond programmes |  |
Disclosure of information about consolidated structured entities [line items] |  |
Fair value pledged mortgage loans | 27,172 | 27,148
Diba Mortgage Pfandbriefe |  |
Disclosure of information about consolidated structured entities [line items] |  |
Fair value pledged mortgage loans | 15,050 | 18,276
ING Belgium Residential Pandbrieven Programme |  |
Disclosure of information about consolidated structured entities [line items] |  |
Fair value pledged mortgage loans | 9,024 | 7,347
IBAL Covered Bond |  |
Disclosure of information about consolidated structured entities [line items] |  |
Fair value pledged mortgage loans | 3,676 | 3,781
ING Bank Hipoteczny CBP |  |
Disclosure of information about consolidated structured entities [line items] |  |
Fair value pledged mortgage loans | € 602 | € 544

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