PENSION AND POSTRETIREMENT PLANS Defined Contribution Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Non Elective Contribution	3.00%
Defined Contribution Plan, Cost	$ 15.8	$ 14.1	$ 31.8	$ 28.7
Discretionary Contribution Percentage Mininum	1.00%
Discretionary Contribution Percentage Maximum	3.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	4.50%
Covance [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 16.5	13.6	35.3	28.6
Postretirement Health Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (0.1)	$ 0.5	$ (0.2)	$ 1.0