IMPAIRMENT TESTING (Details textuals) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [abstract]
Projected cash flows calculation period	10 years
Impairment charge arising in current year	$ 39
Discount rate used in calculation based on a Weighted Average Cost of Capital (WACC)	8.30%	8.70%	8.80%

The discount rate used in the current estimate of the present value of the future cash flows expected to be derived from an asset or cash-generating unit.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2018-01-01
-Paragraph 130
-Subparagraph g
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_130_g&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant