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SEGMENT REPORTING (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Property, Plant and Equipment, Additions, Including Discontinued Operations | [1] | $ 6.8 | $ 26.1
Revenues from producet sales and services, percent |  | 100.00% | 100.00%
Revenues from product sales and services |  | $ 305.5 | $ 446.0
Sales margin |  | 30.9 | 80.8
Other operating expense |  | (31.2) | (8.9)
Other income |  | 122.1 | 270.0
Net Income (Loss) |  | 116.8 | (761.7)
Interest expense, net |  | (56.8) | (44.2)
Income tax expense |  | (7.6) | (175.0)
Gain on extinguishment/restructuring of debt |  | 178.8 | 313.7
EBITDA |  | 216.4 | (509.5)
Adjusted EBITDA |  | 36.3 | 94.4
Depreciation, depletion and amortization |  | 35.2 | 33.0
Total depreciation, depletion and amortization |  | 35.2 | 29.8
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  | 121.8 | 341.9
Property, Plant and Equipment, Additions | [1],[2] | $ 6.8 | $ 13.3
U.S. Iron Ore [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from producet sales and services, percent |  | 61.00% | 70.00%
Revenues from product sales and services |  | $ 185.5 | $ 311.8
Sales margin |  | 13.2 | 80.0
EBITDA |  | 41.4 | 101.6
Adjusted EBITDA |  | 46.1 | 105.1
Depreciation, depletion and amortization |  | 26.9 | 21.7
Property, Plant and Equipment, Additions | [2] | $ 4.5 | $ 9.5
Asia Pacific Iron Ore [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from producet sales and services, percent |  | 39.00% | 30.00%
Revenues from product sales and services |  | $ 120.0 | $ 134.2
Sales margin |  | 17.7 | 0.8
EBITDA |  | 22.3 | 18.0
Adjusted EBITDA |  | 23.0 | 5.7
Depreciation, depletion and amortization |  | 6.8 | 6.3
Property, Plant and Equipment, Additions | [2] | 0.0 | 3.4
All Other Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion and amortization |  | 1.5 | 1.8
Property, Plant and Equipment, Additions | [2] | 2.3 | 0.4
Other Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
EBITDA |  | 152.7 | (629.1)
Adjusted EBITDA |  | (32.8) | (16.4)
EBITDA Calculation [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion and amortization |  | 35.2 | 33.0
Adjusted EBITDA Calculation [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Impact of discontinued operations |  | 2.6 | (929.6)
Severance and contractor termination costs |  | (0.1) | (1.5)
Foreign exchange remeasurement |  | $ (1.2) | $ 13.5
[1] | Includes capital additions of $6.8 million related to continuing operations for the three months ended March 31, 2016. Includes capital additions of $13.3 million and $12.8 million related to continuing operations and discontinued operations, respectively, for the three months ended March 31, 2015.
[2] | Includes capital lease additions and non-cash accruals. Refer to NOTE 17 - CASH FLOW INFORMATION.

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