BUSINESS ACQUISITIONS Business Acquisitions in the Aggregate (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2015
Business Acquisition [Line Items]
Proforma consolidated net revenue	$ 2,728.1			$ 5,339.4
Other Long-term Debt	0.0		$ 0.0		$ 57.8
Revenues	2,866.3	$ 2,528.2	5,714.6	4,941.9
Payments to Acquire Businesses, Net of Cash Acquired			79.1	$ 568.0
Goodwill, Acquired During Period			54.9		1,009.8
Goodwill	$ 7,423.3		7,423.3		$ 7,400.9	$ 6,424.4
Finite-lived Intangible Assets Acquired			$ 48.5