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Net interest income - Additional information (Details) € in Millions |  |  |  | 1 Months Ended | 5 Months Ended | 8 Months Ended | 12 Months Ended | 18 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 22, 2023 | Feb. 08, 2023 | Dec. 31, 2022 | Dec. 21, 2022 | Nov. 22, 2022 | Dec. 31, 2023 | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Dec. 31, 2021 EUR (€) | Jun. 23, 2022
Net Interest Income Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Net interest income |  |  |  |  |  |  | € 16,162 | € 14,593 | € 14,000 |
ECB funding rate benefit on TLTRO II programme |  |  |  |  |  |  |  | 314 | € 808 |
Interest paid, TLTRO III |  |  |  |  |  |  | 557 |  |  |
Funding rate, TLTRO III | 0.0300 | 0.0250 | 0.0200 | 0.0150 |  | 0.0400 |  |  |  | (0.0100)
Funding rate, TLTRO III, series 3 |  |  |  |  | (0.0037) |  |  |  |  |
Funding rate, TLTRO III, series 4 |  |  |  |  | (0.0036) |  |  |  |  |
Funding rate, TLTRO III, series 7 |  |  |  |  | (0.0029) |  |  |  |  |
Poland |  |  |  |  |  |  |  |  |  |
Net Interest Income Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Net interest income |  |  |  |  |  |  | (343) |  |  |
EU IAS 39 carve-out |  |  |  |  |  |  |  |  |  |
Net Interest Income Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Increase (decrease) of net interest income |  |  |  |  |  |  | 187 | € 836 |  |
Without EU IAS 39 carve-out |  |  |  |  |  |  |  |  |  |
Net Interest Income Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Increase (decrease) of net interest income |  |  |  |  |  |  | € 1,382 |  |  |

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- Definition The amount of income or expense arising from interest. [Refer: Interest expense; Interest income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_28_e&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 23 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_23&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_85&doctype=Standard -URIDate 2023-03-23 + Details
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