Business Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Segment Reporting Information [Line Items]
Revenues	$ 9,330	$ 8,521	$ 28,509	$ 21,668
Operating Income	2,278	2,426	7,490	4,723
Cost of revenues charges			(8)
Selling, general and administrative (charges) credits	(59)		(33)
Restructuring and other costs	(18)	(17)	(151)	(67)
Amortization of acquisition-related intangible assets			(1,295)	(1,256)
Interest Income	9	9	32	53
Interest Expense	(128)	(144)	(375)	(407)
Other Income (Expense)	14	(39)	(174)	(36)
Income before income taxes	2,173	2,252	6,973	4,333
Life Sciences Solutions [Member]
Segment Reporting Information [Line Items]
Cost of revenues charges			(8)
Selling, general and administrative (charges) credits	(23)		24
Restructuring and other costs	3		(125)
Analytical Instruments [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative (charges) credits	(1)		(1)
Restructuring and other costs	(2)		(5)
Specialty Diagnostics [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative (charges) credits			2
Restructuring and other costs	(14)		(17)
Laboratory Products and Services [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative (charges) credits	(26)		(49)
Restructuring and other costs	3		5
Total Reportable Segments [Member]
Segment Reporting Information [Line Items]
Operating Income	2,778	2,803	8,977	6,044
Total Reportable Segments [Member] | Life Sciences Solutions [Member]
Segment Reporting Information [Line Items]
Revenues	3,721	3,424	11,481	7,800
Operating Income	1,821	1,879	5,818	3,788
Total Reportable Segments [Member] | Analytical Instruments [Member]
Segment Reporting Information [Line Items]
Revenues	1,476	1,336	4,344	3,488
Operating Income	264	171	816	477
Total Reportable Segments [Member] | Specialty Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenues	1,362	1,430	4,212	3,376
Operating Income	310	398	983	848
Total Reportable Segments [Member] | Laboratory Products and Services [Member]
Segment Reporting Information [Line Items]
Revenues	3,487	3,112	10,667	8,629
Operating Income	383	355	1,360	931
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(716)	(781)	(2,195)	(1,625)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Cost of revenues charges	0	(1)	(8)	(5)
Selling, general and administrative (charges) credits	(59)	55	(33)	7
Restructuring and other costs	(18)	(17)	(151)	(67)
Amortization of acquisition-related intangible assets	$ (423)	$ (414)	$ (1,295)	$ (1,256)