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PENSION AND POSTRETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Feb. 19, 2015
Defined Benefit Plan Disclosures [Line Items]      
Compensation and Employee Benefit Plans [Text Block]
The effect on operations of the post-retirement medical plan is shown in the following table:
 
Three Months Ended March 31,
 
2016
 
2015
Service cost for benefits earned
$
—

 
$
0.1

Interest cost on benefit obligation
0.1

 
0.3

Net amortization and deferral
(3.8
)
 
(2.4
)
Post-retirement medical plan benefits
$
(3.7
)
 
$
(2.0
)
    
Pension Contributions $ 0.0    
Minimum non-elective contribution (NEC) % for the 401(K) plan (in hundredths) 3.00%    
Discretionary Contribution Percentage Mininum 1.00%    
Discretionary Contribution Percentage Maximum 3.00%    
Defined contribution retirement plan cost $ 13.3 $ 12.9  
Pension Plan [Member]      
Defined Benefit Plan and Postretirement Plan Disclosure      
Service cost for benefits earned 1.2 1.0  
Interest cost on benefit obligation 3.9 3.8  
Expected return on plan assets (4.2) (4.6)  
Net amortization and deferral 2.8 2.7  
Defined benefit/postretirement plan costs 3.7 2.9  
Postretirement Health Coverage [Member]      
Defined Benefit Plan Disclosures [Line Items]      
Defined Benefit Plan, Benefit Obligation     $ 6.3
Defined Benefit Plan and Postretirement Plan Disclosure      
Defined benefit/postretirement plan costs 0.4 0.2  
Other Pension Plan, Postretirement or Supplemental Plans [Member]      
Defined Benefit Plan and Postretirement Plan Disclosure      
Service cost for benefits earned 0.8 0.3  
Interest cost on benefit obligation 2.2 0.9  
Expected return on plan assets (3.1) (1.3)  
Net amortization and deferral 0.0 0.2  
Defined benefit/postretirement plan costs $ (0.1) $ 0.1  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 3.80% 3.60%  
Defined Benefit Plan Expected Rate Of Return On Assets Other Assets 5.60% 5.40%  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 3.60% 3.50%  
Other Pension Plan [Member]      
Defined Benefit Plan and Postretirement Plan Disclosure      
Service cost for benefits earned $ 0.2 $ 0.1  
Interest cost on benefit obligation 0.2 0.0  
Net amortization and deferral 0.0 0.1  
Defined Benefit Plan, Other Changes (0.1) 0.0  
Defined benefit/postretirement plan costs $ 0.3 $ 0.2  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.50% 2.20%  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 2.00% 2.00%  
Supplemental Employee Retirement Plan [Member]      
Defined Benefit Plan Disclosures [Line Items]      
Defined Benefit Plan, Benefit Obligation     $ 32.8
Defined Benefit Plan and Postretirement Plan Disclosure      
Service cost for benefits earned $ 0.0 $ 0.4  
Interest cost on benefit obligation 0.2 0.9  
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments 0.2 1.3  
Other Postretirement Benefit Plan [Member]      
Defined Benefit Plan and Postretirement Plan Disclosure      
Service cost for benefits earned 0.0 0.1  
Interest cost on benefit obligation 0.1 0.3  
Net amortization and deferral (3.8) (2.4)  
Defined benefit/postretirement plan costs (3.7) (2.0)  
Covance [Member]      
Defined Benefit Plan Disclosures [Line Items]      
Defined contribution retirement plan cost $ 13.7 $ 4.7