Material accounting policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2025
Buildings
Disclosure of detailed information about property, plant and equipment
Useful lives	33 years
Minimum \| Installation and machinery
Disclosure of detailed information about property, plant and equipment
Useful lives	3 years
Minimum \| Furniture, fixtures & vehicles
Disclosure of detailed information about property, plant and equipment
Useful lives	4 years
Minimum \| Leasehold
Disclosure of detailed information about property, plant and equipment
Useful lives	3 years
Maximum \| Installation and machinery
Disclosure of detailed information about property, plant and equipment
Useful lives	15 years
Maximum \| Furniture, fixtures & vehicles
Disclosure of detailed information about property, plant and equipment
Useful lives	10 years
Maximum \| Leasehold
Disclosure of detailed information about property, plant and equipment
Useful lives	10 years