BUSINESS ACQUISITIONS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 19, 2014	Mar. 31, 2013
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	$ 27,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	94,700,000
Long-term debt, less current portion	5,038,800,000	$ 5,416,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	700,000
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	2,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	14,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	3,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	72,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	1,258,700,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	1,164,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	53,500,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	32,700,000
Goodwill, Acquired During Period, net of measurement period adjustments	558,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	1,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	(500,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	(300,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	572,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	$ 12,500,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	16 years 8 months 12 days
Goodwill, net	$ 8,121,000,000	7,958,900,000	$ 7,751,500,000
Payments to Acquire Businesses, Net of Cash Acquired	1,164,000,000	496,900,000	267,600,000
Finite-lived Intangible Assets Acquired	542,300,000	198,500,000
Goodwill, Acquired During Period	598,500,000	298,400,000
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,000,000,000
Revenues	14,876,800,000	16,120,900,000	13,978,500,000
Operating Income (Loss)	1,773,900,000	3,259,500,000	2,445,400,000
Senior notes due 2020 [Member]
Business Acquisition [Line Items]
Long-term debt, less current portion	500,000,000.0	500,000,000.0			$ 600,000,000.0
Excluding Envigo [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			121,300,000
Goodwill, Acquired During Period		298,400,000	166,200,000
Other acquirees [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	0	1,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		62,200,000	4,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	15,400,000	75,200,000	28,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		496,900,000	267,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	0	6,600,000	1,100,000
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	0	2,500,000	900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	15,400,000	3,900,000	22,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	300,600,000	572,100,000	296,100,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	285,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	100,000	56,600,000	1,300,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	300,000	3,000,000.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	(1,300,000)	(10,800,000)	(4,900,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	0	(3,200,000)	(2,400,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	172,500,000	198,500,000	121,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	2,300,000
Finite-lived Intangible Assets Acquired	542,300,000
Goodwill, Acquired During Period	126,700,000	298,400,000	166,200,000
2021 acquisitions
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	14,997,600,000	16,310,500,000
Business Acquisition, Pro Forma Net Income (Loss)	1,282,400,000	2,362,100,000
2020 Acquisitions
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		16,216,600,000	14,112,800,000
Business Acquisition, Pro Forma Net Income (Loss)		$ 2,378,300,000	$ 1,554,500,000
Ascension Acquisition
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	24,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	2,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	0
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	2,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	426,700,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	423,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	43,500,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	233,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	0
Goodwill, Acquired During Period	125,000,000.0
Measurement Period Adjustments
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	(2,600,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	(2,600,000)
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	(100,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	(2,600,000)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	0
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	15,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	2,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	3,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	30,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	(2,300,000)
Goodwill, Acquired During Period	(40,400,000)
PGDx
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	2,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	79,000,000.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	3,300,000
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	14,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	3,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	57,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	534,000,000.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	455,000,000.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	9,900,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	17,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	1,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	(4,100,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	(2,900,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	136,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	12,500,000
Goodwill, Acquired During Period	$ 346,800,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			15 years
Finite-Lived Intangible Asset, Useful Life			19 years
Customer Relationships [Member] | Other acquirees [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years		12 years
Technology-Based Intangible Assets
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Technology-Based Intangible Assets | Other acquirees [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Trade Names [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Trade Names [Member] | Other acquirees [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Non-compete agreements [Member] | Other acquirees [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Trade Names [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
Finite-lived Intangible Assets Acquired	$ 10,800,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	18 years 2 months 12 days
Finite-lived Intangible Assets Acquired	$ 408,500,000