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LONG-TERM DEBT (Details 2) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 16, 2014
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]          
Principal payments on long-term debt     $ 136.0 $ 1,950.0 $ 0.3
Loss on extinguishment of debt     (0.9) (243.6)  
Outstanding letter of credit amount   $ 7.7 7.7 7.7  
Interest expense     94.8 130.6 $ 123.4
Revolving Credit Facility          
Debt Instrument [Line Items]          
Debt instrument term 5 years        
Revolving credit facility $ 600.0        
Amount outstanding   $ 0.0 $ 0.0 $ 0.0  
Revolving credit facility agreement       Borrowings under the Revolving Credit Facility bear interest at an annual rate equal to the London interbank offered rate ("LIBOR") plus 200 basis points or prime (as defined therein) plus 100 basis points.  
Debt, interest rate   4.00%      
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread percentage 2.00%        
Revolving Credit Facility | Prime Rate          
Debt Instrument [Line Items]          
Basis spread percentage 1.00%        
Term Loan Facility          
Debt Instrument [Line Items]          
Debt instrument term 7 years        
Revolving credit facility agreement     Borrowings under the Term Loan Facility bear interest at an annual rate equal to LIBOR plus 325 basis points (LIBOR shall not be less than 75 basis points per annum) or ABR (as defined therein) plus 225 basis points    
Aggregate principal amount $ 2,200.0        
Term Loan Facility | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread percentage 3.25%        
Term Loan Facility | London Interbank Offered Rate (LIBOR) | Minimum          
Debt Instrument [Line Items]          
Basis spread percentage 0.75%        
Term Loan Facility | Prime Rate          
Debt Instrument [Line Items]          
Basis spread percentage 2.25%        
Senior Unsecured Notes 5.25 Percent Due 2022          
Debt Instrument [Line Items]          
Principal payments on long-term debt       $ 1,300.0  
Debt, due date       2022  
Interest rate (as a percent)   5.25% 5.25%    
Senior Unsecured Notes 6.875 Percent Due 2020          
Debt Instrument [Line Items]          
Principal payments on long-term debt       $ 650.0  
Debt, due date       2020  
Interest rate (as a percent)   6.875% 6.875%    
Covenant Requirement | Minimum          
Debt Instrument [Line Items]          
Interest coverage ratio   300.00% 300.00%    
Covenant Requirement | Maximum          
Debt Instrument [Line Items]          
Interest coverage ratio   525.00% 525.00%