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PENSION PLANS (Details 8) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets $ 2,036.5 $ 1,978.7 $ 1,860.7
Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 97.6 171.3  
Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 1,312.8 1,362.7  
Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 626.1 444.7  
U.S. Equity Securities      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 79.6 82.2  
U.S. Equity Securities | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 36.4 69.8  
U.S. Equity Securities | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 43.2 12.4  
U.S. Equity Securities | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Non-U.S. Equity Securities      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 122.7 150.9  
Non-U.S. Equity Securities | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.8 35.4  
Non-U.S. Equity Securities | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 121.9 115.5  
Non-U.S. Equity Securities | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Acquisition plan receivable      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 212.0    
Acquisition plan receivable | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0    
Acquisition plan receivable | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0    
Acquisition plan receivable | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 212.0    
Cash and Cash Equivalents      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 60.1 65.7  
Cash and Cash Equivalents | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 60.1 65.7  
Cash and Cash Equivalents | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Cash and Cash Equivalents | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
US Treasury Securities      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 427.6 469.9  
US Treasury Securities | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
US Treasury Securities | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 425.6 465.6  
US Treasury Securities | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 2.0 4.3  
Corporate Debt Securities      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 314.2 339.7  
Corporate Debt Securities | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.3 0.4  
Corporate Debt Securities | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 301.9 329.7  
Corporate Debt Securities | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 12.0 9.6  
Asset-backed Securities      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 155.6 150.5  
Asset-backed Securities | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Asset-backed Securities | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 155.6 150.5  
Asset-backed Securities | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Hedge Funds, Equity      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 335.6 358.8  
Hedge Funds, Equity | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Hedge Funds, Equity | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Hedge Funds, Equity | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 335.6 358.8  
Real Estate Funds      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 27.4 34.0  
Real Estate Funds | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Real Estate Funds | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Real Estate Funds | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 27.4 34.0  
Private Equity Funds      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 18.4 17.7  
Private Equity Funds | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Private Equity Funds | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Private Equity Funds | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 18.4 17.7  
Absolute Return Strategies      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 283.3 309.3  
Absolute Return Strategies | Fair Value, Inputs, Level 1      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 0.0 0.0  
Absolute Return Strategies | Fair Value, Inputs, Level 2      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets 264.6 289.0  
Absolute Return Strategies | Fair Value, Inputs, Level 3      
Defined benefit pension plan assets [Abstract]      
Fair value of plan assets $ 18.7 $ 20.3