SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Share based payment (Details) - Option	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Other Equity Instruments In Share-Based Payment Arrangement [Line Items]
Number of share options issued in share-based payment arrangement	19,643,184	0
LTIP \| PSUs
Disclosure Of Other Equity Instruments In Share-Based Payment Arrangement [Line Items]
Number of share options issued in share-based payment arrangement	0

The number of share options outstanding in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Name:	ifrs-full_NumberOfOutstandingShareOptions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant