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4. Accounting policies (Detail Narrative)	12 Months Ended
	Dec. 31, 2018
Land
DisclosureOfAccountingPoliciesLineItems [Line Items]
Estimated useful lives	Not depreciated
Facilities in service
DisclosureOfAccountingPoliciesLineItems [Line Items]
Estimated useful lives	Between 30 and 50 years
Furniture, tools and equipment
DisclosureOfAccountingPoliciesLineItems [Line Items]
Estimated useful lives	Between 5 and 20 years

X

- References

No definition available.

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- Definition

The useful lives or depreciation rates used for property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2018-01-01
-Paragraph 73
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_c&doctype=Standard
-URIDate 2018-03-16

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