Annual report pursuant to Section 13 and 15(d)

SEGMENT REPORTING (Schedule Of Segment Reporting Information, By Segment) (Details)

v3.6.0.2
SEGMENT REPORTING (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]                      
Revenues from product sales and services $ 754.0 $ 553.3 $ 496.2 $ 305.5 $ 476.0 $ 593.2 $ 498.1 $ 446.0 $ 2,109.0 $ 2,013.3 $ 3,373.2
Revenues from producet sales and services, percent                 100.00% 100.00% 100.00%
SALES MARGIN $ 181.5 $ 85.4 $ 91.5 $ 30.9 $ 43.3 $ 55.1 $ 57.3 $ 80.8 $ 389.3 $ 236.5 $ 885.7
Other operating expense                 (148.5) (85.2) (755.6)
Other expense                 (33.8) 161.8 (149.8)
Income (loss) from continuing operations before income taxes and equity loss from ventures                 207.0 313.1 (19.7)
Net income (loss)                 199.3 (748.4) (8,311.6)
Interest Income (Expense), net, including Discontinued Operations                 (200.5) (231.4) (185.2)
Income Tax Expense (Benefit), including Discontinued Operations                 12.2 (163.3) 1,302.0
Depreciation, depletion and amortization                 (115.4) (134.0) (504.0)
EBITDA                 503.0 (219.7) (8,924.4)
Gain on extinguishment/restructuring of debt                 166.3 392.9 16.2
Asset Impairment Charges                 0.0 3.3 635.5
Adjusted EBITDA                 373.5 292.9 1,048.3
Depreciation, Depletion and Amortization excluding Depreciation, Amortization and Depletion expense for Discontinued Operations                 115.4 130.8 261.0
Capital Additions                 68.5 72.2 65.5
U.S. Iron Ore [Member]                      
Segment Reporting Information [Line Items]                      
Revenues from product sales and services                 $ 1,554.5 $ 1,525.4 $ 2,506.5
Revenues from producet sales and services, percent                 74.00% 76.00% 74.00%
SALES MARGIN                 $ 275.7 $ 227.1 $ 710.4
Depreciation, depletion and amortization                 (84.0) (98.9) (107.4)
EBITDA                 342.4 317.6 805.6
Adjusted EBITDA                 359.6 352.1 833.5
Capital Additions                 62.2 58.2 48.4
Asia Pacific Iron Ore [Member]                      
Segment Reporting Information [Line Items]                      
Revenues from product sales and services                 $ 554.5 $ 487.9 $ 866.7
Revenues from producet sales and services, percent                 26.00% 24.00% 26.00%
SALES MARGIN                 $ 113.6 $ 9.4 $ 121.7
Depreciation, depletion and amortization                 (25.1) (25.3) (145.9)
EBITDA                 128.3 35.3 (352.9)
Adjusted EBITDA                 132.9 32.7 252.9
Capital Additions                 0.2 5.4 10.8
Discontinued Operations [Member]                      
Segment Reporting Information [Line Items]                      
Eliminations with Discontinued Operations                 0.0 0.0 53.6
All Other Segments [Member]                      
Segment Reporting Information [Line Items]                      
Depreciation, depletion and amortization                 (6.3) (6.6) (7.7)
Capital Additions                 6.1 8.6 6.3
Other Segment [Member]                      
Segment Reporting Information [Line Items]                      
EBITDA                 32.3 (572.6) (9,377.1)
Adjusted EBITDA                 (119.0) (91.9) (38.1)
EBITDA Calculation [Member]                      
Segment Reporting Information [Line Items]                      
Depreciation, depletion and amortization                 (115.4) (134.0) (504.0)
Adjusted EBITDA Calculation [Member]                      
Segment Reporting Information [Line Items]                      
Impact of Discontinued Operations                 (19.9) (892.0) (9,332.5)
Foreign Exchange Remeasurement                 (16.8) 16.3 29.0
Severance Costs                 (0.1) (10.2) (23.3)
Inventory Write-down                 0.0 (16.3) 0.0
Proxy contest and change in control costs in SG&A                 $ 0.0 $ 0.0 $ (26.6)