Quarterly report pursuant to Section 13 or 15(d)

DISCONTINUED OPERATIONS (Schedule of Disposal Groups, including Discontinued Operations) (Details)

v3.10.0.1
DISCONTINUED OPERATIONS (Schedule of Disposal Groups, including Discontinued Operations) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jan. 01, 2018
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Cash Provided by (Used in) Investing Activities     $ (99.8) $ (48.3)    
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX $ (64.3) $ (53.7) (135.2) (5.0)    
Current assets of discontinued operations 45.3   45.3   $ 118.5 $ 118.5
Non-current assets of discontinued operations 0.0   0.0   20.3 20.3
Current liabilities of discontinued operations 117.3   117.3   75.0 75.0
NON-CURRENT LIABILITIES OF DISCONTINUED OPERATIONS 10.3   10.3   $ 52.2 52.2
Depreciation, depletion and amortization     49.4 44.8    
Payments to Acquire Property, Plant, and Equipment     72.3 5.1    
Asia Pacific Iron Ore [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Revenues from product sales and services 70.1 98.0 129.1 273.4    
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX (53.3) (7.3) (124.7) 41.0    
Current assets of discontinued operations 45.3   45.3     118.5
Non-current assets of discontinued operations 0.0   0.0     20.3
Current liabilities of discontinued operations 114.4   114.4     71.8
NON-CURRENT LIABILITIES OF DISCONTINUED OPERATIONS 10.3   10.3     52.2
Disposal Group, Including Discontinued Operation, Costs of Goods Sold (106.1) (97.1) (230.2) (225.2)    
Sales margin (36.0) 0.9 (101.1) 48.2    
Disposal Group, Including Discontinued Operation, Operating Expense (16.2) (3.2) (18.8) (3.7)    
Disposal Group, Including Discontinued Operation, Other Expense (1.1) (1.3) (2.2) (2.7)    
Loss from discontinued operations before income taxes (53.3) (3.6) (122.1) 41.8    
Impairment of Long-Lived Assets to be Disposed of 0.0 0.0 (2.6) 0.0    
Discontinued Operation, Tax Effect of Discontinued Operation 0.0 (3.7) 0.0 (0.8)    
North American Coal [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX (0.3) 2.6 0.1 2.6    
Current assets of discontinued operations 0.0   0.0     0.0
Non-current assets of discontinued operations 0.0   0.0     0.0
Current liabilities of discontinued operations 2.9   2.9     3.2
NON-CURRENT LIABILITIES OF DISCONTINUED OPERATIONS 0.0   0.0     $ 0.0
Canadian Entities [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX $ (10.7) $ (49.0) (10.6) (48.6)    
Discontinued Operations [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Cash Provided by (Used in) Investing Activities     14.1 (0.8)    
Discontinued Operations [Member] | Asia Pacific Iron Ore [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Net Cash Provided by (Used in) Investing Activities     $ 14.1 $ (0.8)