BUSINESS ACQUISITIONS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Combination Purchase Price Allocation [Line Items]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		$ 2.0
Revenues	$ 2,791.2	2,848.3
Operating Income (Loss)	318.2	305.4
Other Significant Noncash Transaction, Value of Consideration Given	24.7
Net Income (Loss) Attributable to Parent	185.6	173.2
Goodwill, Acquired During Period	22.1
Goodwill	7,385.9		$ 7,360.3
Cash payments for laboratory-related assets	94.2	72.5
Payments to Acquire Businesses, Net of Cash Acquired	47.3	$ 0.0
Finite-lived Intangible Assets Acquired	$ 24.8