Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
DEBT AND CREDIT FACILITIES (Debt Instrument Redemption) (Details)
 3 Months Ended
Mar. 31, 2020
6.75% 2026 Senior Notes [Member] | Debt Instrument, Redemption, Period One, Including Premium [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
6.75% 2026 Senior Notes [Member] | Debt Instrument, Redemption, Period One, Upon Equity Issuance [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 106.75%
6.75% 2026 Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 105.063%
6.75% 2026 Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 103.375%
6.75% 2026 Senior Notes [Member] | Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 101.688%
6.75% 2026 Senior Notes [Member] | Debt Instrument, Redemption, Period Five [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
6.375% 2025 Senior Notes [Member] | Debt Instrument, Redemption, Period One, Including Premium [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
6.375% 2025 Senior Notes [Member] | Debt Instrument, Redemption, Period One, Upon Equity Issuance [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 106.375%
6.375% 2025 Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 103.188%
6.375% 2025 Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 101.594%
6.375% 2025 Senior Notes [Member] | Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
7.00% 2027 Senior Notes [Member] | Debt Instrument, Redemption, Period One, Including Premium [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
7.00% 2027 Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 103.50%
7.00% 2027 Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 102.333%
7.00% 2027 Senior Notes [Member] | Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 101.167%
7.00% 2027 Senior Notes [Member] | Debt Instrument, Redemption, Period Five [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
7.50% 2023 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 101.875%
7.50% 2023 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
7.50% 2023 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 103.75%
6.375% 2025 AK Senior Notes [Member] | Debt Instrument, Redemption, Period One, Including Premium [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
6.375% 2025 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 103.188%
6.375% 2025 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 101.594%
6.375% 2025 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
7.00% 2027 AK Senior Notes [Member] | Debt Instrument, Redemption, Period One, Including Premium [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 100.00%
7.00% 2027 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 103.50%
7.00% 2027 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 102.333%
7.00% 2027 AK Senior Notes [Member] | Debt Instrument, Redemption, Period Four [Member]  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, Redemption Price, Percentage 101.167%