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Note 52 Fees for audits conducted and other related services (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Fees for audits conducted and other related services [Line Items] |  |  |
Audits of the companies audited by firms belonging to the EY worldwide organization and other reports related with the audit | [1],[2] | € 28.5 | € 24.8
Other reports required pursuant to applicable legislation and tax regulations issued by the national supervisory bodies of the countries in which the group operates reviewed by firms belonging to EY | [2] | 1.4 | 1.0
Fees for audits conducted by other firms | [2] | € 0.1 | € 0.1
[1] | (2) Including fees pertaining to annual legal audits (€23.3 million as of December 31, 2023)
[2] | (1) Regardless of the billed year.

X
- Definition Audits of the companies audited by firms belonging to the EY worldwide organization and other reports related with the audit + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Fees for audits conducted by other firms + References No definition available. + Details
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X
- Definition Other reports required pursuant to applicable legislation and tax regulations issued by the national supervisory bodies of the countries in which the group operates reviewed by firms belonging to EY + References No definition available. + Details
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