v3.26.1
Income taxes - Reconciliation between statutory tax and effective tax charge (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Taxes      
Profit (loss) before taxation € 5,778 € 6,489 € 10,228
Tax rate (IRES) (%) 24.00% 24.00% 24.00%
Statutory corporation tax charge (credit) on profit or loss € 1,387 € 1,557 € 2,455
Increase (decrease) resulting from:      
- higher tax charges related to subsidiaries outside Italy 1,692 3,452 3,036
- tax effect on reserve distribution 50 147 106
- impact pursuant to foreign tax effects of italian entities 47 108 14
- effect due to the tax regime provided for intercompany dividends 46 82 7
- tax effects related to previous years 9 6 48
- Italian regional income tax (IRAP) 56 (15) 91
- effect of the valuation of the investments under the equity method (30) (30) (26)
- impact pursuant to (reversal) impairment of deferred tax assets (260) (1,470) (221)
- effect of gains from sale / business combination   (38) (96)
- other adjustments 23 (74) (46)
Net tax effect 1,633 2,168 2,913
Income tax expense 3,020 3,725 5,368
Exploration & Production      
Increase (decrease) resulting from:      
- higher tax charges related to subsidiaries outside Italy € 1,653 € 3,403 € 3,026