Annual report pursuant to Section 13 and 15(d)

DEBT AND CREDIT FACILITIES DEBT AND CREDIT FACILITIES (Debt Redemption) (Details)

v3.10.0.1
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%