| Assets [member] | |||||||
| Property, plant and equipment [member] | Intangible assets other than goodwill [member] | Goodwill [member] | Investments accounted for using equity method [member] | Other impaired assets [member] | |||
| 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 | |||||||