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DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS (Narrative) (Details) CAD in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 CAD | Mar. 08, 2016 CAD | Dec. 31, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Deconsolidation, Gain (Loss), Amount |  |  |  | $ 528.2 |  |  |
Loans to and accounts receivable from the Canadian Entities | $ 69.3 |  | $ 69.3 |  |  |  | $ 72.9
Guarantees | 0.2 |  | 0.2 |  |  |  | 96.5
Sale amount for Pointe Noire port and rail assets | CAD |  |  |  |  |  | CAD 66,750 |
Sale Amount of the Bloom Lake Mine and Labrador Trough South mineral claims | CAD |  |  |  |  | CAD 10,500 |  |
Canadian Entities [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Discontinued Operation, Tax Effect of Discontinued Operation | 0.0 | $ (0.7) | 0.0 | 0.0 |  |  |
Deconsolidation, Gain (Loss), Amount | (0.9) | (13.4) | 3.2 | (697.4) |  |  |
Cost Method Investments | 0.0 |  | 0.0 |  |  |  |
Contingent Liabilities of Deconsolidated Entities | 0.0 | 0.5 | 0.0 | (203.1) |  |  |
Wabush [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Debtor-in-Possession Financing, Amount Arranged | 10.0 |  | 10.0 |  |  |  |
Debtor-in-Possession Financing, Borrowings Outstanding | 0.0 |  | 0.0 |  |  |  |
North American Coal [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Discontinued Operation, Tax Effect of Discontinued Operation | 0.0 | $ (2.1) | 0.0 | $ (2.6) |  |  |
Other Current Assets [Member] | Canadian Entities [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Debtor-in-Possession Financing, Borrowings Outstanding | 1.5 |  | 1.5 |  |  |  | 6.8
Debtor-in-possession,Repayment | 8.3 |  | 8.3 |  |  |  |
Other Liabilities [Member] | Bloom Lake Group [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Contingent Liabilities recognized in Consolidated Financials | $ 37.9 |  | $ 37.9 |  |  |  | $ 35.9

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