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Note 18 Tax assets and liabilities (Details) - EUR (€)
€ in Millions
Jun. 30, 2022
Dec. 31, 2021
Tax assets and liabilities [Line Items]    
Current tax assets € 1,115 € 932
Deferred tax assets 14,721 14,917
Tax assets 15,836 15,850
Current tax liabilities 893 644
Deferred tax liabilities [1] 1,212 1,769
Tax liabilities € 2,105 € 2,413
[1] (*) The variation is mainly due to the impact of the application of IAS 29 in Turkey (see Note 2.1).