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EARNINGS PER SHARE - Number of Shares Attributable to Equity Holders (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings per share [abstract]
Weighted average number of ordinary shares used to calculate basic earnings per share (in shares)	137,901,336	136,700,491	137,903,307	136,344,030
Effect of other dilutive potential ordinary shares (in shares)	0	3,620,938	0	4,005,235
Weighted average number of ordinary shares used to calculate diluted earnings per share (in shares)	137,901,336	140,321,429	137,903,307	140,349,265
Potential ordinary shares (in shares)	4,880,758		4,878,787

X

- Definition

Calculation of diluted potential ordinary shares.

+ References

No definition available.

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X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
-IssueDate 2019-01-01
-Paragraph 70
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-URIDate 2019-03-27

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- Definition

The number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 33
-IssueDate 2019-01-01
-Paragraph 70
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2019-en-r&anchor=para_70_b&doctype=Standard
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- References

No definition available.

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- Definition

The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 33
-IssueDate 2019-01-01
-Paragraph 70
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-URIDate 2019-03-27

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