RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Market Risk (Details)	9 Months Ended
	Sep. 30, 2020 equity_type
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Floating rate debt as target percentage of total debt outstanding	30.00%
Short-term pay fixed-receive floating interest rate swaps
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate (percent)	3.00%
Long-term forward starting interest rate swaps
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate (percent)	2.30%
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Number of forms of stock-based compensation with equity price risk	1