Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS (Narrative) (Details)

v3.10.0.1
DISCONTINUED OPERATIONS (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jun. 29, 2018
USD ($)
Jan. 01, 2018
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) $ 228,100,000          
Cash Contribution   $ 19.0        
Cost Method Investments         $ 0  
Loans to and accounts receivables from the Canadian Entities 0   $ 51,600,000     $ 51,600,000
Contingent claims 0   55,600,000     $ 55,600,000
Short-term loan receivable     7,700,000      
INCOME FROM DISCONTINUED OPERATIONS, net of tax 88,200,000   2,500,000 $ 76,700,000    
Canadian Entities [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Income tax benefit (expense) (15,900,000)   0 0    
Cost Method Investments     0      
Loans to and accounts receivables from the Canadian Entities     51,600,000      
Contingent Liabilities recognized in Consolidated Financials       37,200,000    
INCOME FROM DISCONTINUED OPERATIONS, net of tax (26,500,000)   (21,300,000) (17,500,000)    
North American Coal [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Income tax benefit (expense) 1,000,000   0 0    
INCOME FROM DISCONTINUED OPERATIONS, net of tax $ (3,600,000)   2,600,000 $ (2,400,000)    
Wabush Scully Mine Sale [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
INCOME FROM DISCONTINUED OPERATIONS, net of tax     $ 31,400,000