DEBT AND CREDIT FACILITIES DEBT AND CREDIT FACILITIES (Debt Redemption) (Details) - $400 Million 4.875% 2024 Senior Notes [Member]	12 Months Ended
	Dec. 31, 2018
Prior to January 15, 2021 - upon equity issuance
Debt Instrument, Redemption [Line Items]
Redemption Price	104.875%
Restricted Amount (percent of original aggregate principal)	35.00%
Prior to January 15, 2021, including premium
Debt Instrument, Redemption [Line Items]
Redemption Price	100.00%
Prior to January 15, 2021
Debt Instrument, Redemption [Line Items]
Redemption Price	103.00%
Restricted Amount (percent of original aggregate principal)	10.00%
Beginning on January 15, 2021
Debt Instrument, Redemption [Line Items]
Redemption Price	102.438%
Beginning on January 15, 2022
Debt Instrument, Redemption [Line Items]
Redemption Price	101.219%
Beginning on January 15, 2023
Debt Instrument, Redemption [Line Items]
Redemption Price	100.00%