ACQUISITION OF AK STEEL - Overview (Details) $ in Millions |
3 Months Ended | 7 Months Ended | 9 Months Ended | 12 Months Ended | |||||||
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Mar. 13, 2020
USD ($)
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Sep. 30, 2020
USD ($)
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Sep. 30, 2019
USD ($)
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Sep. 30, 2020
USD ($)
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Sep. 30, 2020
USD ($)
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Sep. 30, 2019
USD ($)
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Dec. 31, 2019
USD ($)
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Oct. 01, 2020
USD ($)
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| Business Acquisition [Line Items] | |||||||||||
| Revenues | $ 1,646.0 | $ 555.6 | $ 3,097.8 | [1] | $ 1,455.8 | ||||||
| Net income (loss) | (10.0) | 90.9 | (186.0) | 229.6 | |||||||
| Amortization of inventory step-up | 74.0 | 0.0 | |||||||||
| Acquisition-related costs | 7.5 | $ 0.0 | 68.4 | $ 0.0 | |||||||
| AK Steel Holding Corporation [Member] | |||||||||||
| Business Acquisition [Line Items] | |||||||||||
| Business Acquisition, Shares Exchange Ratio | 0.400 | ||||||||||
| Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period | $ 6,359.4 | ||||||||||
| Revenues | 1,261.7 | $ 2,194.3 | |||||||||
| Net income (loss) | (30.4) | (292.0) | |||||||||
| Amortization of inventory step-up | 14.6 | 74.0 | |||||||||
| Severance costs | 2.4 | $ 35.1 | |||||||||
| Acquisition-related costs | $ 0.6 | $ 25.6 | |||||||||
| Business Combination, Consideration Transferred | $ 1,535.1 | ||||||||||
| Forecast [Member] | AK Steel Holding Corporation [Member] | |||||||||||
| Business Acquisition [Line Items] | |||||||||||
| Cost synergies | $ 150.0 | ||||||||||
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- Definition Amortization of Inventory Step-up No definition available.
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- Definition Business Acquisition, Shares Exchange Ratio No definition available.
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- Definition Cost synergies 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 Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. No definition available.
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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