DEBT AND CREDIT FACILITIES (Schedule of Extinguishment of Debt) (Details) - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 27, 2020 |
Mar. 13, 2020 |
Mar. 31, 2020 |
Mar. 31, 2019 |
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| Extinguishment of Debt [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt, Amount | Ìý | Ìý | $ 739.9 | $ 10.0 |
| Gain (loss) on extinguishment of debt | Ìý | Ìý | 3.2 | (0.3) |
| 7.625% 2021 AK Senior Notes [Member] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt, Amount | $ 8.5 | $ 364.2 | 372.7 | Ìý |
| Gain (loss) on extinguishment of debt | Ìý | Ìý | 0.4 | Ìý |
| 7.50% 2023 AK Senior Notes [Member] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt, Amount | $ 56.5 | $ 310.7 | 367.2 | Ìý |
| Gain (loss) on extinguishment of debt | Ìý | Ìý | $ 2.8 | Ìý |
| 4.875% 2021 Senior Notes [Member] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Extinguishment of Debt, Amount | Ìý | Ìý | Ìý | 10.0 |
| Gain (loss) on extinguishment of debt | Ìý | Ìý | Ìý | $ (0.3) |
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- Definition Gross amount of debt extinguished. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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