CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 213,300,000	$ 492,100,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation And Amortization Of Leased Assets	47,800,000	48,900,000
Depreciation and amortization	165,900,000	161,500,000
Stock compensation	40,600,000	38,200,000
Asset Impairment Charges	2,200,000	1,200,000
Deferred income taxes	1,800,000	(19,000,000.0)
Other Operating Activities, Cash Flow Statement	5,800,000	(3,600,000)
Change in assets and liabilities (net of effects of acquisitions):
Increase in accounts receivable (net)	117,500,000	(20,400,000)
Increase (Decrease) in Unbilled Contract Receivable	(91,600,000)	84,500,000
Increase in inventories	10,000,000.0	37,400,000
Decrease in accounts payable	(56,400,000)	(5,500,000)
Increase (Decrease) in Deferred Revenue	2,500,000	(2,900,000)
Increase (Decrease) in Prepaid Expense and Other Assets	59,800,000	41,100,000
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities	(206,600,000)	(212,300,000)
Net cash provided by operating activities	121,200,000	356,000,000.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash payments for laboratory-related assets	(93,900,000)	(117,200,000)
Proceeds from sale of assets	100,000	1,000,000.0
Proceeds from Sale of Equity Method Investments	0	400,000
Payments to Acquire Equity Method Investments	(6,100,000)	(2,200,000)
Net Cash Provided by (Used in) Investing Activities	(99,700,000)	(573,100,000)
Payments to Acquire Businesses, Net of Cash Acquired	200,000	(455,100,000)
Net cash used for investing activities	(99,700,000)	(573,100,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facilities	827,900,000	0
Repayments of Lines of Credit	(827,900,000)	0
Payment, Tax Withholding, Share-based Payment Arrangement	20,500,000	27,300,000
Net proceeds from issuance of stock to employees	27,600,000	18,200,000
Payments of Dividends	(64,400,000)	0
Other Financing Cash Flows	3,300,000	8,600,000
Net cash provided by (used for) financing activities	(60,600,000)	(17,700,000)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(36,100,000)	(239,200,000)
Business Acquisition [Line Items]
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	3,000,000.0	(4,400,000)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 393,900,000	$ 1,233,500,000