| Assets [member] | ||||||||||
| Intangible assets other than goodwill [member] | Exploration and evaluation assets [member] | Financial assets, class [member] | Goodwill [member] | Non-current assets or disposal groups classified as held for sale [member] | Inventarios [miembro] | Other impaired assets [member] | Total deterioro [miembro] | |||
| Disclosure of impairment loss and reversal of impairment loss [abstract] | ||||||||||
| Disclosure of impairment loss and reversal of impairment loss [line items] | ||||||||||
| Impairment loss recognised in profit or loss | ||||||||||
| Description of line item(s) in statement of comprehensive income in which impairment losses recognised in profit or loss are included | ||||||||||
| Reversal of impairment loss recognised in profit or loss | ||||||||||
| Description of line item(s) in statement of comprehensive income in which impairment losses recognised in profit or loss are reversed | ||||||||||
| Impairment loss recognised in other comprehensive income | ||||||||||
| Reversal of impairment loss recognised in other comprehensive income | ||||||||||