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PENSION AND POSTRETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Defined Benefit Plan Disclosures [Line Items]    
Pension Contributions $ 0.0  
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,
 
2017
 
2016
Interest cost on benefit obligation
0.1

 
0.1

Net amortization and deferral
(1.7
)
 
(3.8
)
Post-retirement medical plan benefits
$
(1.6
)
 
$
(3.7
)
  
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 $ 14.5 $ 13.3
Defined Benefit Plan and Postretirement Plan Disclosure    
Interest cost on benefit obligation 0.1 0.2
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments (0.1) 0.0
Pension and Other Postretirement Benefit Expense 0.0 0.2
Pension Plan [Member]    
Defined Benefit Plan and Postretirement Plan Disclosure    
Service cost for benefits earned 1.4 1.2
Interest cost on benefit obligation 3.7 3.9
Expected return on plan assets (4.1) (4.2)
Net amortization and deferral 2.8 2.8
Defined benefit/postretirement plan costs 3.8 3.7
Postretirement Health Coverage [Member]    
Defined Benefit Plan and Postretirement Plan Disclosure    
Defined benefit/postretirement plan costs 0.5 0.4
Other Pension Plan, Postretirement or Supplemental Plans [Member]    
Defined Benefit Plan and Postretirement Plan Disclosure    
Service cost for benefits earned 0.9 0.8
Interest cost on benefit obligation 1.8 2.2
Expected return on plan assets (2.8) (3.1)
Net amortization and deferral 0.2 0.0
Defined benefit/postretirement plan costs $ 0.1 $ (0.1)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.70% 3.80%
Defined Benefit Plan Expected Rate Of Return On Assets Other Assets 4.70% 5.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 3.80% 3.60%
Other Pension Plan [Member]    
Defined Benefit Plan and Postretirement Plan Disclosure    
Service cost for benefits earned $ 0.3 $ 0.2
Interest cost on benefit obligation 0.1 0.2
Defined Benefit Plan, Other Changes 0.0 (0.1)
Defined benefit/postretirement plan costs $ 0.4 $ 0.3
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 1.70% 2.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 2.00% 2.00%
Other Postretirement Benefit Plan [Member]    
Defined Benefit Plan and Postretirement Plan Disclosure    
Interest cost on benefit obligation $ 0.1 $ 0.1
Net amortization and deferral (1.7) (3.8)
Defined benefit/postretirement plan costs (1.6) (3.7)
Covance [Member]    
Defined Benefit Plan Disclosures [Line Items]    
Defined contribution retirement plan cost $ 15.0 $ 13.7