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Note 19 Deferred tax assets and liabilities annual variations (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
 [1]
Deffered tax assets and liabilities [Line Items]      
Deferred tax assets € 14,641 € 14,747 [1],[2] € 14,917
Deferred tax liabilities 1,677 1,520 [1],[2] 1,769
Deferred tax assets and liabilities 14,354 14,641 14,747 [2]
Deferred tax liabilities 2,458 1,677 1,520 [2]
Deferred assets [Member]      
Deffered tax assets and liabilities [Line Items]      
Deferred tax pensions 89 23 6
Deferred tax financials instruments 266 (409) 70
Deferred tax loss allowances 31 293 158
Deferred tax others 28 206 160
Deferred tax guaranteed tax assets (555) (155) (615)
Deferred tax tax losses (146) (64) 51
Deferred liabilities [Member]      
Deffered tax assets and liabilities [Line Items]      
Deferred tax pensions 0 0 0
Deferred tax financials instruments 154 204 (567)
Deferred tax loss allowances 0 0 0
Deferred tax others 627 (47) 318
Deferred tax guaranteed tax assets 0 0 0
Deferred tax tax losses € 0 € 0 € 0
[1] (1) Balances corresponding to 2022 have been restated according to IFRS 17 (see Note 1.3)
[2]
(2) Balances corresponding to 2022 have been restated according to IFRS 17 (see Note 1.3).