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SEGMENT REPORTING (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Revenues from producet sales and services, percent | 100.00% | 100.00% | 100.00% | 100.00%
Revenues from product sales and services | $ 698.4 | $ 553.3 | $ 1,729.3 | $ 1,355.0
Sales margin | 160.2 | 85.4 | 401.0 | 207.8
Other operating expense | (30.5) | (50.7) | (74.8) | (98.7)
Other income (expense) | (116.7) | (66.9) | (266.2) | 8.3
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest | 13.0 | (32.2) | 60.0 | 117.4
Net Income (Loss) | 52.9 | (27.8) | 53.2 | 118.5
Interest expense, net | (28.9) | (48.7) | (103.1) | (156.2)
Income Tax Expense (Benefit) | (7.6) | (7.1) | (6.8) | (1.7)
Depreciation, depletion and amortization | 21.5 | 26.8 | 66.3 | 88.9
EBITDA | 95.7 | 40.6 | 215.8 | 361.9
Gain (loss) on extinguishment/restructuring of debt | (88.6) | (18.3) | (165.4) | 164.1
Adjusted EBITDA | 154.4 | 61.9 | 383.6 | 199.7
Property, Plant and Equipment, Additions | 27.1 | 26.4 | 79.6 | 44.5
Payments To Acquire Property Plant And Equipment Net |  |  | 78.9 | 45.8
Capital Expenditures Incurred but Not yet Paid |  |  | 0.7 | (1.3)
Foreign Currency Transaction Gain (Loss), before Tax | (2.4) | (0.3) | 11.2 | (1.2)
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX | $ 32.3 | $ (2.7) | $ (13.6) | $ (0.6)
U.S. Iron Ore [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from producet sales and services, percent | 85.00% | 77.00% | 78.00% | 72.00%
Revenues from product sales and services | $ 596.7 | $ 428.3 | $ 1,354.2 | $ 975.5
Sales margin | 157.2 | 66.5 | 349.8 | 149.7
Depreciation, depletion and amortization | 16.5 | 18.8 | 49.6 | 65.1
EBITDA | 168.9 | 61.1 | 381.8 | 196.6
Adjusted EBITDA | 174.2 | 65.3 | 399.8 | 208.6
Property, Plant and Equipment, Additions | $ 19.2 | $ 25.8 | $ 70.9 | $ 39.5
Asia Pacific Iron Ore [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from producet sales and services, percent | 15.00% | 23.00% | 22.00% | 28.00%
Revenues from product sales and services | $ 101.7 | $ 125.0 | $ 375.1 | $ 379.5
Sales margin | 3.0 | 18.9 | 51.2 | 58.1
Depreciation, depletion and amortization | 3.3 | 6.3 | 11.3 | 19.2
EBITDA | 2.3 | 21.2 | 54.9 | 69.6
Adjusted EBITDA | 4.9 | 23.7 | 61.7 | 73.2
Property, Plant and Equipment, Additions | 0.8 | 0.2 | 1.6 | 0.2
All Other Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion and amortization | 1.7 | 1.7 | 5.4 | 4.6
EBITDA | (75.5) | (41.7) | (220.9) | 95.7
Adjusted EBITDA | (24.7) | (27.1) | (77.9) | (82.1)
Property, Plant and Equipment, Additions | 7.1 | 0.4 | 7.1 | 4.8
EBITDA Calculation [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion and amortization | 21.5 | 26.8 | 66.3 | 88.9
Adjusted EBITDA Calculation [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Severance and contractor termination costs | $ 0.0 | $ 0.0 | $ 0.0 | $ (0.1)

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