PENSION AND POSTRETIREMENT PLANS Defined Contribution Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Non Elective Contribution	3.00%
Discretionary Contribution Percentage Minimum	1.00%
Defined Contribution Plan Total Expense	$ 13.9	$ 16.2	$ 27.4	$ 32.2
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	$ 20.3	$ 17.9	$ 43.8	$ 37.8