| Temporary difference, unused tax losses and unused tax credits [member] | |||||
| Temporary differences [member] | Unused tax losses [member] | Unused tax credits [member] | |||
| Deferred tax assets and liabilities [abstract] | |||||
| Deferred tax assets | |||||
| Deferred tax liabilities | |||||
| Deferred tax liability (asset) | |||||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||||
| Analysis of change in deferred tax liabilities [text block] | |||||
| Analysis of change in deferred tax assets [text block] | |||||