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SEGMENT REPORTING (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Revenues from producet sales and services, percent | 100.00% | 100.00%
Revenues from product sales and services | $ 461.6 | $ 305.5
Sales margin | 95.7 | 30.9
Other operating expense | (13.8) | (31.2)
Other income (expense) | (114.0) | 122.1
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | (32.1) | 121.8
Net Income (Loss) | (29.8) | 116.8
Interest expense, net | (42.8) | (56.8)
Income tax benefit (expense) | 1.8 | (7.6)
Depreciation, depletion and amortization | 23.2 | 35.2
EBITDA | 34.4 | 216.4
Gain (loss) on extinguishment/restructuring of debt | (71.9) | 178.8
Adjusted EBITDA | 92.2 | 36.3
Property, Plant and Equipment, Additions | 27.3 | 6.8
Payments To Acquire Property Plant And Equipment Net | 27.9 | 10.4
Capital Expenditures Incurred but Not yet Paid | $ (0.6) | $ (3.6)
U.S. Iron Ore [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues from producet sales and services, percent | 62.00% | 61.00%
Revenues from product sales and services | $ 286.2 | $ 185.5
Sales margin | 48.4 | 13.2
Depreciation, depletion and amortization | 16.4 | 26.9
EBITDA | 57.9 | 41.4
Adjusted EBITDA | 64.1 | 46.1
Property, Plant and Equipment, Additions | $ 27.1 | $ 4.5
Asia Pacific Iron Ore [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues from producet sales and services, percent | 38.00% | 39.00%
Revenues from product sales and services | $ 175.4 | $ 120.0
Sales margin | 47.3 | 17.7
Depreciation, depletion and amortization | 4.7 | 6.8
EBITDA | 51.4 | 22.3
Adjusted EBITDA | 53.8 | 23.0
Property, Plant and Equipment, Additions | 0.2 | 0.0
All Other Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Depreciation, depletion and amortization | 2.1 | 1.5
EBITDA | (74.9) | 152.7
Adjusted EBITDA | (25.7) | (32.8)
Property, Plant and Equipment, Additions | 0.0 | 2.3
EBITDA Calculation [Member] |  |
Segment Reporting Information [Line Items] |  |
Depreciation, depletion and amortization | 23.2 | 35.2
Adjusted EBITDA Calculation [Member] |  |
Segment Reporting Information [Line Items] |  |
Impact of discontinued operations | 0.5 | 2.6
Severance and contractor termination costs | 0.0 | (0.1)
Foreign exchange remeasurement | $ 13.6 | $ (1.2)

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