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Personnel costs - Additional Information (Details) - employee | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Employee Benefits [Abstract] |  |  |
Number of employees | 87,994 | 91,573 | 95,442

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- Definition The number of personnel employed by the entity at a date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Employee Benefits [Abstract] + References No definition available. + Details
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