BUSINESS ACQUISITIONS (Details) - USD ($) $ / shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jul. 31, 2017	Dec. 31, 2015
Business Combination Purchase Price Allocation [Line Items]
Proforma consolidated net revenue	$ 2,696.8	$ 2,495.5	$ 7,874.8	$ 7,422.0
Proforma consolidated net income			5.3
Revenues	2,655.2	2,414.7	7,645.1	7,213.4
Operating Income (Loss)	341.3	324.0	1,010.0	989.0
Other Long-term Debt	515.0		515.0		$ 56.2
Other Significant Noncash Transaction, Value of Consideration Given			65.2
Net Income (Loss) Attributable to Parent	180.6	179.5	561.4	547.7
Goodwill, Acquired During Period			817.2		398.3
Goodwill	7,325.1		7,325.1		$ 6,424.4		$ 6,202.1
Cash payments for laboratory-related assets			216.8	204.6
Payments to Acquire Businesses, Net of Cash Acquired			1,799.3	396.8
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax	342.5	322.3	1,022.8	998.4
Business Acquisition, Pro Forma Net Income (Loss)	$ 176.8	$ 171.9	$ 551.5	$ 534.2
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 0	$ 0	$ 0	$ 0
Proforma consolidated diluted earnings per share	$ 0	$ 0	$ 0	$ 0
Chiltern [Member]
Business Combination Purchase Price Allocation [Line Items]
Cash paid for acquisition						$ 1,224.5
Revenues			$ 47.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents						30.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						116.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets						32.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets						57.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						12.1
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						676.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets						1,626.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable						18.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						51.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue						124.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent						208.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other						1.1
Business Combination, Separately Recognized Transactions, Liabilities Recognized						402.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						1,224.5
Customer Relationships [Member] | Chiltern [Member]
Business Combination Purchase Price Allocation [Line Items]
Acquired Finite-lived Intangible Assets, Useful Life			21 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						629.0
Trademarks and Trade Names [Member] | Chiltern [Member]
Business Combination Purchase Price Allocation [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			7 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						24.1
Software and Software Development Costs [Member] | Chiltern [Member]
Business Combination Purchase Price Allocation [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			9 years
Technology-Based Intangible Assets [Member] | Chiltern [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 47.0