SIGNIFICANT ACCOUNTING POLICIES - Net Earnings per Share (Details) - shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
SIGNIFICANT ACCOUNTING POLICIES
Weighted average number of ordinary shares outstanding	2,153,688,011	2,153,688,011

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
-IssueDate 2020-01-01
-Paragraph 70
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_70_b&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_WeightedAverageShares
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration