FAIR VALUE MEASUREMENTS (Details 2) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Settlements $ (26.7) $ (23.2)    
Unrealized losses included in other income (expense) 0 6.4    
Balance at end of period $ 0 $ 25.2 $ 26.7 $ 42.0