CAPITAL STRUCTURE, FINANCIAL RISK AND RELATED ITEMS - Restricted Stock Unit Program (Details) - RSUs	12 Months Ended
Dec. 31, 2019 shares
Share-Based Instruments
Vesting period	3 years
Period from vesting date for crediting shares	30 days
Number of shares per RSU	1

Period which the right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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