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DERIVATIVES Part I (Details)
In Millions, unless otherwise specified
 12 Months Ended 5 Months Ended 5 Months Ended 18 Months Ended 3 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2012
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Not Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Interest Rate Swaps [Member]
Other Long-term Assets [Member]
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2012
Foreign Exchange Contract [Member]
Prepaid Expenses and Other Current Assets [Member]
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Foreign Exchange Contract [Member]
Prepaid Expenses and Other Current Assets [Member]
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Interest Rate Cap [Member]
Other Long-term Assets [Member]
Not Designated as Hedging Instrument [Member]
USD ($)
Oct. 18, 2010
Interest Rate Swaps on 2014 Notes [Member]
USD ($)
Jun. 01, 2010
Interest Rate Swaps on 2014 Notes [Member]
USD ($)
Aug. 03, 2011
Interest Rate Swaps on 2019 Notes [Member]
USD ($)
Mar. 07, 2011
Interest Rate Swaps on 2019 Notes [Member]
USD ($)
Jun. 08, 2012
Additional Swaps on 2014 Notes [Member]
USD ($)
Dec. 17, 2010
Additional Swaps on 2014 Notes [Member]
USD ($)
May 31, 2012
Additional Swaps on 2019 Notes [Member]
USD ($)
Mar. 21, 2012
Additional Swaps on 2019 Notes [Member]
USD ($)
Dec. 31, 2012
Canadian Dollar U.S. Dollar Forward Contracts [Member]
USD ($)
Dec. 31, 2011
Canadian Dollar U.S. Dollar Forward Contracts [Member]
USD ($)
Dec. 31, 2010
Canadian Dollar U.S. Dollar Forward Contracts [Member]
USD ($)
Dec. 31, 2012
British Pound - U.S. Dollar Forward Exchange Contracts [Member]
GBP (£)
Derivative [Line Items]                                            
Number of interest rate swap transactions                       3   3   3   3        
Amount of hedged item related to derivative                       $ 250   $ 150   $ 250   $ 150        
Fixed interest rate related to derivative                       5.125%   6.875%   5.125%   6.875%        
Variable interest rate related to derivative                     three-month LIBOR rates (that were reset on the 15th day of each calendar quarter) plus 2.92%   three-month LIBOR rates (which were reset on the 15th day of each calendar quarter) plus 3.73%   three-month LIBOR rates (which were reset on the 15th day of each calendar quarter) plus 3.46%   one-month LIBOR rates (which were reset on the 15th day of each calendar quarter) plus 5.195%          
Cost of interest rate cap                       2.7                    
Interest rate cap                       5.00%                    
Amount received upon termination of swaps                     10.2   8.1   5.7   3.5          
Increase in interest expense related to ineffectiveness of swap 1.3 1.0 1.0                                      
Increase in fair value of interest rate cap 0.2 1.1 1.4                                      
Net increase in interest expense related to derivatives 1.5 2.1 2.4                                      
Notional amounts of foreign exchange contracts outstanding                                     16.1 5.3 20.3 6.0
Derivatives, Fair Value [Line Items]                                            
Derivative assets       $ 0.2 $ 5.6 $ 0.2 $ 5.5 $ 0.2 $ 0.1 $ 0.2