| The amount of 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]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Investment property at cost less accumulated depreciation and impairment | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Investment property at cost less accumulated depreciation and impairment at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Investment property at cost less accumulated depreciation and impairment at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |