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CAPITAL STOCK (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Class of Stock [Line Items] |  |  |  |
Common Shares Issued in Debt to Equity Exchange | 1,800,000 |  | 1,800,000 |
Gain on extinguishment/restructuring of debt | $ 3.6 | $ 0.0 | $ 182.4 | $ 313.7
Common Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Convertible Preferred Stock, Common Shares Issued Upon Conversion in Lieu of Dividend | 1,300,000 |  | 1,300,000 |
Convertible Preferred Stock, Shares Issued upon Conversion | 0.9052 |  | 0.9052 |
Common shares, issued (in shares) | 26,500,000 |  | 26,500,000 |
Convertible Preferred Stock, Common Shares Issued Upon Conversion | 25,200,000 |  | 25,200,000 |
Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Debt Instrument, Face Amount Received in Debt Exchange of $500M 3.95% Notes | $ 11.4 |  | $ 11.4 |
Debt Instrument, Face Amount Received in Debt Exchange of $500M 4.80% Notes | 17.9 |  | 17.9 |
Exchange of Debt for Equity [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Gain on extinguishment/restructuring of debt |  |  | 3.6 |
Exchange of Debt for Equity [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Gain on extinguishment/restructuring of debt |  |  | 4.5 |
Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Debt Instrument, Face Amount Received in Debt Exchange of $500M 3.95% Notes | 10.0 |  | 10.0 |
Debt Instrument, Face Amount Received in Debt Exchange of $500M 4.80% Notes | $ 12.6 |  | $ 12.6 |
Minimum [Member] | Common Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion | 0.8621 |  | 0.8621 |

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