| Issued capital [member] | Retained earnings [member] | Treasury shares [member] | Capital reserve [member] | Foreign currency translation reserve [member] | Revaluation surplus [member] | Other non-distributable reserves [member] | Other distributable reserves [member] | Other reserves [member] | Equity attributable to owners of parent [member] | Non-controlling interests [member] | Equity, others components [member] | Total equity [member] | ||
| Equity at beginning of period | ||||||||||||||
| Impact of changes in accounting policies | ||||||||||||||
| Equity at beginning of period, restated | ||||||||||||||
| Changes in equity [abstract] | ||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||
| Profit (loss) | ||||||||||||||
| Other comprehensive income | ||||||||||||||
| Total comprehensive income | ||||||||||||||
| Contributions by and distribution to owners of the company [abstract] | ||||||||||||||
| Acquisition (dilution) of equity interest in subsidiaries | ||||||||||||||
| Arising from conversion of Irredeemable Convertible Unsecured Loan Stock (ICULS) | ||||||||||||||
| Dividends paid | ||||||||||||||
| Issuance of shares | ||||||||||||||
| Issue of convertible notes, net of tax | ||||||||||||||
| Increase (decrease) through share-based payment transactions, equity | ||||||||||||||
| Treasury shares transactions | ||||||||||||||
| Other transactions with owners | ||||||||||||||
| Increase (decrease) through other changes, equity | ||||||||||||||
| Total increase (decrease) in equity | ||||||||||||||
| Equity at end of period | ||||||||||||||