Industry Segment Information (Schedule of Sales and Operating Income by Operating Segment, Excluding Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 03, 2022	Apr. 04, 2021
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,259,442	$ 1,307,689
Operating income (loss) from continuing operations	254,845	467,776
Interest and other expense (income), net	37,245	(12,706)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	217,600	480,482
Product [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	866,945	811,552
Service [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	392,497	496,137
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss) from continuing operations	(17,682)	(16,638)
Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	657,076	853,080
Operating income (loss) from continuing operations	258,012	441,467
Diagnostics [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	458,070	544,297
Diagnostics [Member] \| Service [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	199,006	308,783
Discovery & Analytical Solutions [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	602,366	454,609
Operating income (loss) from continuing operations	14,515	42,947
Discovery & Analytical Solutions [Member] \| Product [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	408,875	267,255
Discovery & Analytical Solutions [Member] \| Service [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 193,491	$ 187,354

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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