Quarterly report pursuant to Section 13 or 15(d)

DEBT AND CREDIT FACILITIES (Narrative) (Details)

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DEBT AND CREDIT FACILITIES (Narrative) (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Line of Credit Facility [Line Items]          
Payments of Debt Issuance Costs     $ 5.2 $ 33.6  
Letters of credit outstanding $ 112.8   112.8   $ 186.3
Gain on extinguishment/restructuring of debt $ 3.6 $ 0.0 $ 182.4 $ 313.7  
$400 Million 5.90% 2020 Senior Notes [Member]          
Line of Credit Facility [Line Items]          
Stated interest rate 5.90%   5.90%    
Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member]          
Line of Credit Facility [Line Items]          
Stated interest rate 8.25%   8.25%    
In the Event of Default Amount that will Accelerate     0.25    
Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member]          
Line of Credit Facility [Line Items]          
Stated interest rate 7.75%   7.75%    
Revolving Credit Facility [Member]          
Line of Credit Facility [Line Items]          
Credit facility, amount outstanding [1] $ 0.0   $ 0.0    
Line of Credit Facility, Maximum Borrowing Capacity 425.6   425.6   366.0
Debt Instrument, Par Value 550.0   550.0   550.0
Credit facility remaining capacity 312.8   312.8   $ 179.2
Letters of credit outstanding $ 112.8   $ 112.8    
Revolving Credit Facility [Member] | Minimum [Member]          
Line of Credit Facility [Line Items]          
Base Rate     0.005    
Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member]          
Line of Credit Facility [Line Items]          
Stated interest rate 8.00%   8.00%    
Repurchase Price of $218.5M 8.00% Notes if Triggering Event Occurs     1.01    
Initial Redemption Price     1.04    
Debt Instrument, Par Value $ 218.5   $ 218.5    
Redemption Price after September 30, 2017     1.00    
Redemption Price from time to time and prior to September 30, 2017     1.00    
Amount in aggregate that can be redeemed on or prior to September 30, 2017     0.35    
Redemption Price of 35 percent or less of Outstanding     1.08    
Amount to Remain Outstanding Prior to September 30, 2017     0.65    
Exchange of Debt [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member]          
Line of Credit Facility [Line Items]          
Gain on extinguishment/restructuring of debt     $ 174.3    
[1] As of June 30, 2016, no loans were drawn under the ABL Facility and we had total availability of $425.6 million as a result of borrowing base limitations. As of June 30, 2016, the principal amount of letter of credit obligations totaled $112.8 million, thereby further reducing available borrowing capacity on our ABL Facility to $312.8 million.