BUSINESS ACQUISITIONS & DISPOSITIONS Envigo (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 03, 2019
Business Acquisition [Line Items]
Operating Income (Loss)	$ 336.4	$ 339.9	$ 335.7	$ 318.2	$ 307.7	$ 343.4	$ 369.2	$ 305.4	$ 1,330.2	$ 1,325.7	$ 1,305.2
Payments to Acquire Businesses, Net of Cash Acquired									876.0	117.8	1,882.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	0.0								0.0
Notes Receivable, Fair Value Disclosure	110.0				$ 0.0				$ 110.0	$ 0.0	$ 0.0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									13 years 1 month 6 days
Envigo [Member]
Business Acquisition [Line Items]
Operating Income (Loss)									$ 17.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	26.2								26.2			$ 26.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	4.5								4.5			4.5
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	379.3								379.3			432.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	11.4								11.4			15.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	12.0								12.0			16.5
Payments to Acquire Businesses, Net of Cash Acquired									601.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	9.4								9.4			3.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	127.2								127.2			99.1
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	13.5								13.5			25.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	140.8								140.8			125.8
Indefinite-Lived Trade Names												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	734.8								734.8			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	10.1								10.1			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	58.6								58.6			66.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	133.8								133.8			158.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	601.0								$ 601.0			601.0
Notes Receivable, Fair Value Disclosure												$ 110.0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									11 years
Other acquirees [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	0.8								$ 0.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	4.4								4.4
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	115.1								115.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	2.2								2.2
Payments to Acquire Businesses, Net of Cash Acquired									286.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	1.1								1.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	8.5								8.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	184.3								184.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	0.1								0.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	316.5								316.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	1.5								1.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	14.1								14.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	3.6								3.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	10.9								10.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	30.1								30.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	286.4								$ 286.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									12 years
Cash and Cash Equivalents [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	3.7								$ 3.7
Accounts Receivable [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	4.5								4.5
Other Current Assets [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	0.3								0.3
Inventories [Member] | Envigo [Member]
Business Acquisition [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 Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	5.9								5.9
Property, Plant and Equipment [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	28.1								28.1
Customer Relationships [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	15.0								15.0
Trademarks and Trade Names [Member] | Envigo [Member]
Business Acquisition [Line Items]
Indefinite-Lived Trade Names	0.0								0.0
Other Noncurrent Assets [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	0.0								0.0
Assets [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	24.4								24.4
Accounts Payable [Member] | Envigo [Member]
Business Acquisition [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 Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1.5								1.5
Deferred Revenue [Domain] | Envigo [Member]
Business Acquisition [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 Acquisition [Line Items]
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	15.0								15.0
Other Noncurrent Liabilities [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	7.7								7.7
Goodwill [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	52.9								52.9
Liability [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	24.4								$ 24.4
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									13 years 7 months 6 days
Customer Relationships [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	141.4								$ 141.4
Trade Names [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									9 months 18 days
Trade Names [Member] | Envigo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 0.6								$ 0.6