BUSINESS ACQUISITIONS (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 03, 2019	Dec. 31, 2018
Business Combination Purchase Price Allocation [Line Items]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)				$ 3.0				$ 8.4
Revenues	$ 2,928.5			2,831.3			$ 8,601.4	8,545.9
Operating Income (Loss)	339.9			343.4			993.8	1,018.0
Other Significant Noncash Transaction, Value of Consideration Given	25.1	$ 9.2	$ 24.7	24.4
Net Income (Loss) Attributable to Parent	220.7	190.4	$ 185.6	$ 318.8	$ 233.8	$ 173.2	596.7	725.8
Goodwill, Acquired During Period							540.0
Goodwill	7,815.3						7,815.3			$ 7,360.3
Cash payments for laboratory-related assets							272.0	257.6
Payments to Acquire Businesses, Net of Cash Acquired							852.9	79.1
Notes Receivable, Fair Value Disclosure	110.0						110.0			$ 0.0
Total acquisition consideration (cash, stock, notes, etc.)									$ 711.0
Gain (Loss) on Disposition of Assets							(11.9)	$ 209.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	0.0						0.0
Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	(11.2)						(11.2)		(15.1)
Revenues		52.0					68.5
Operating Income (Loss)		$ 9.0					9.7
Payments to Acquire Businesses, Net of Cash Acquired							$ 601.0
Notes Receivable, Fair Value Disclosure									110.0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							11 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	(15.3)						$ (15.3)		(16.5)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	26.5						26.5		26.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	4.5						4.5		4.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	3.5						3.5		3.5
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	(16.2)						(16.2)		(25.5)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	(84.1)						(84.1)		(99.1)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	(414.2)						(414.2)		(432.2)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	144.5						144.5		125.8
Indefinite-Lived Trade Names	0.6						0.6		0.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	9.9						9.9		9.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	(730.5)						(730.5)		(759.2)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	(15.2)						(15.2)		(15.4)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	(7.4)						(7.4)		(11.6)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	49.9						49.9		49.9
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	0.0						0.0		(15.0)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	(57.0)						(57.0)		(66.3)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(129.5)						(129.5)		(158.2)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	601.0						601.0		$ 601.0
Trademarks and Trade Names [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Indefinite-Lived Trade Names	0.0						0.0
Cash and Cash Equivalents [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	(3.9)						(3.9)
Accounts Receivable [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	(1.2)						(1.2)
Other Current Assets [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	0.0						0.0
Inventories [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	0.0						0.0
Prepaid Expenses and Other Current Assets [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	0.0						0.0
Property, Plant and Equipment [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	(15.0)						(15.0)
Deferred Tax Asset [Domain] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	(9.3)						(9.3)
Goodwill [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	(18.0)						(18.0)
Customer Relationships [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	18.7						18.7
Other Noncurrent Assets [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	0.0						0.0
Assets [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	(28.7)						(28.7)
Accounts Payable [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	(0.2)						(0.2)
Accrued Liabilities [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	(4.2)						(4.2)
Deferred Revenue [Domain] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	0.0						0.0
Other Liabilities [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	(15.0)						(15.0)
Other Noncurrent Liabilities [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	(9.3)						(9.3)
Liability [Member] | Envigo [Member]
Business Combination Purchase Price Allocation [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ (28.7)						$ (28.7)