| Group [member] | Company [member] | ||
| Other income [abstract] | |||
| Deferred income | |||
| Grants or incentives | |||
| Realised gain on foreign exchange | |||
| Unrealised gain on foreign exchange | |||
| Gain from disposal of a subsidiary, joint ventures and associates | |||
| Gain on disposal of property, plant and equipment | |||
| Gain on disposal from other investments | |||
| Reversal of impairment losses | |||
| Other miscellaneous income | |||
| Total other income | |||