| Investment property at cost less accumulated depreciation and impairment [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Concept not required as result of 2015 Amendments to the IFRS for SMEs | en | http://www.xbrl.org/2009/role/deprecatedLabel | http://www.xbrl.org/2003/role/link |
| 2017-01-01 | en | http://www.xbrl.org/2009/role/deprecatedDateLabel | http://www.xbrl.org/2003/role/link |
| This member stands for a class of property, plant and equipment representing investment property at cost less accumulated depreciation and impairment because the fair value cannot be measured reliably without undue cost or effort on an ongoing basis. [Refer: Investment property [member]; Property, plant and equipment] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |