BUSINESS ACQUISITIONS Business Acquisitions in the Aggregate (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2014
Business Acquisition [Line Items]
Other Long-term Debt	$ 565.0		$ 56.2
Revenues	2,447.0	$ 2,368.0
Payments to Acquire Businesses, Net of Cash Acquired	151.8	93.3
Goodwill, Acquired During Period	58.0	$ 398.3
Goodwill	6,502.1		$ 6,424.4	$ 6,202.1
Excluding Covance [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	151.8
Finite-lived Intangible Assets Acquired	92.9
Goodwill, Acquired During Period	$ 58.0