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DEBT AND CREDIT FACILITIES DEBT AND CREDIT FACILITIES (Debt Restructuring) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Extinguishment of Debt [Line Items]    
Extinguishment of Debt, Amount $ 1,070.8  
Gain (loss) on extinguishment/restructuring of debt (71.9) $ 178.8
$218.5 Million 8.00% 2020 Lien Notes [Member]    
Extinguishment of Debt [Line Items]    
Extinguishment of Debt, Amount 218.5  
Gain (loss) on extinguishment/restructuring of debt 45.1  
$544 Million 7.75% 2020 Lien Notes[Member]    
Extinguishment of Debt [Line Items]    
Extinguishment of Debt, Amount 430.1  
Gain (loss) on extinguishment/restructuring of debt (104.5)  
$400 Million 5.90% 2020 Senior Notes [Member]    
Extinguishment of Debt [Line Items]    
Extinguishment of Debt, Amount 136.8  
Gain (loss) on extinguishment/restructuring of debt (7.8)  
Five Hundred Million Four Point Eight Zero Percent Senior Note [Member]    
Extinguishment of Debt [Line Items]    
Extinguishment of Debt, Amount 114.4  
Gain (loss) on extinguishment/restructuring of debt (1.9)  
$700 Million 4.875% 2021 Senior Note [Member]    
Extinguishment of Debt [Line Items]    
Extinguishment of Debt, Amount 171.0  
Gain (loss) on extinguishment/restructuring of debt $ (2.8)