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Note 19 Deferred tax assets and liabilities annual variations (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Deferred assets [Member]      
Deffered tax assets and liabilities [Line Items]      
Deferred tax assets and liabilities € 14,917 € 15,327 € 15,318
Deferred tax pensions 6 (23) (17)
Deferred tax financials instruments (106) 116 (94)
Deferred tax loss allowances 158 (7) 47
Deferred tax others 83 32 24
Deferred tax guaranteed tax assets (615) (57) (2)
Deferred tax tax losses 51 (471) 51
Deferred tax assets and liabilities 14,494 14,917 15,327
Deferred liabilities [Member]      
Deffered tax assets and liabilities [Line Items]      
Deferred tax assets and liabilities 1,769 1,809 1,928
Deferred tax pensions 0 0 0
Deferred tax financials instruments (556) 216 (106)
Deferred tax loss allowances 0 0 0
Deferred tax others 113 (256) (13)
Deferred tax guaranteed tax assets 0 0 0
Deferred tax tax losses 0 0 0
Deferred tax assets and liabilities € 1,326 € 1,769 € 1,809