COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2020 |
Dec. 31, 2019 |
|
| Unrecorded Unconditional Purchase Obligation [Line Items] | Ìý | Ìý |
| Estimated Project Capital Expenditures | $ 1,000.0 | Ìý |
| Total Project Expenditures, Excluding Capitalized Interest | 800.0 | Ìý |
| Environmental obligations accrued | 40.0 | $ 2.0 |
| Hamilton Plant [Member] | Ìý | Ìý |
| Unrecorded Unconditional Purchase Obligation [Line Items] | Ìý | Ìý |
| Environmental obligations accrued | 0.7 | Ìý |
| Ashland Works Coke Plant [Member] | Ìý | Ìý |
| Unrecorded Unconditional Purchase Obligation [Line Items] | Ìý | Ìý |
| Environmental obligations accrued | 1.4 | Ìý |
| Capital Addition Purchase Commitments [Member] | Ìý | Ìý |
| Unrecorded Unconditional Purchase Obligation [Line Items] | Ìý | Ìý |
| Capital Additions, Purchase Commitments | $ 150.0 | Ìý |
| X | ||||||||||
- Definition Estimated Project Capital Expenditures [Member] No definition available.
|
| X | ||||||||||
- Definition Total Project Expenditures, Excluding Capitalized Interest No definition available.
|
| X | ||||||||||
- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|