Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Net sales	$ 536,880	$ 572,619	$ 1,108,524	$ 1,126,598
Income before income taxes	1,245,945	769,601	2,144,644	1,896,867
Life Science [Member]
Segment Reporting Information [Line Items]
Net sales	252,100	212,400	479,200	428,100
Income before income taxes	32,700	11,400	58,000	34,300
Clinical Diagnostics [Member]
Segment Reporting Information [Line Items]
Net sales	283,200	357,100	623,400	691,100
Income before income taxes	16,600	42,400	62,800	73,200
Other Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,600	3,100	5,900	7,400
Income before income taxes	$ (100)	$ (500)	$ 700	$ (600)