v3.26.1
Intangible assets - Main amortization rates (Details)
12 Months Ended
Dec. 31, 2025
Exploration rights  
Intangible assets  
Description of useful life, intangible assets other than goodwill UOP
Concessions, licenses, trademarks and similar items | Minimum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 3.00%
Concessions, licenses, trademarks and similar items | Maximum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 33.00%
Industrial patents and intellectual property rights | Minimum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 20.00%
Industrial patents and intellectual property rights | Maximum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 33.00%
Capitalized costs for customer acquisition | Minimum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 17.00%
Capitalized costs for customer acquisition | Maximum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 33.00%
Other intangible assets | Minimum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 3.00%
Other intangible assets | Maximum  
Intangible assets  
Amortisation rate, intangible assets other than goodwill 20.00%