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Segments - Additional information (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of operating segments [line items] |  |  |
Total income | € 18,121 | € 30,418 | € 20,093
Impairments | 5 | 192 | 3
Hyperinflationary accounting, net profit (loss) | 234 |  |
Net result IFRS-EU | Segments banking activities |  |  |
Disclosure of operating segments [line items] |  |  |
Total income | 22,575 | 18,561 | 18,490
– Operating expenses | 11,564 | 11,199 | 11,192
Net result IFRS-EU | Segments banking activities | Corporate Line |  |  |
Disclosure of operating segments [line items] |  |  |
Total income | 450 | 84 | 387
Hyperinflationary accounting, income | (179) | (279) |
Total income excl hyperinflationary impacts | 266 |  |
– Operating expenses | € 542 | 535 | € 580
Increase in operating expenses | 1300.00% |  |
Hyperinflationary accounting, net profit (loss) | € 48 | 30 |
Provision for hyperinflationary impact |  | 51 |
Goodwill impairment |  | 32 |
TMBThanachart Bank Public Company Limited & Bank Of Beijing |  |  |
Disclosure of operating segments [line items] |  |  |
Share of profit (loss) of associates accounted for using equity method | € 185 |  |
TMBThanachart Bank Public Company Limited | Net result IFRS-EU | Segments banking activities | Corporate Line |  |  |
Disclosure of operating segments [line items] |  |  |
Impairments |  | € (165) |

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