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Note 25 Equity impact (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Equity impact [Line Items]      
Total impact on equity debit credit € 132 € 314 € (433)
Defined benefit plans equity impact [Member]      
Equity impact [Line Items]      
Total impact on equity debit credit 218 302 (363)
Post employment medical benefits equity impact [Member]      
Equity impact [Line Items]      
Total impact on equity debit credit € (86) € 12 € (71)