Segment Information (Segment Data) (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 26, 2025	Jun. 27, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Sales	$ 6,053,000,000		$ 5,798,000,000	$ 17,730,000,000	$ 17,337,000,000
Less:
Depreciation	(189,000,000)		(177,000,000)	(555,000,000)	(534,000,000)
Amortization of intangible assets	(433,000,000)		(414,000,000)	(1,269,000,000)	(1,223,000,000)
Impairments	(101,000,000)		(222,000,000)	(548,000,000)	(222,000,000)
Other segment expenses	(4,176,000,000)		(4,027,000,000)	(12,170,000,000)	(11,920,000,000)
Operating profit	1,154,000,000		958,000,000	3,188,000,000	3,438,000,000
Identifiable assets	79,897,000,000			79,897,000,000		$ 77,542,000,000
Capital expenditures	292,000,000		298,000,000	785,000,000	876,000,000
Other
Segment Reporting Information [Line Items]
Sales	0		0	0	0
Less:
Depreciation	(3,000,000)		(2,000,000)	(7,000,000)	(6,000,000)
Amortization of intangible assets	0		0	0	0
Impairments	0		0	0	0
Other segment expenses	(82,000,000)		(80,000,000)	(250,000,000)	(237,000,000)
Operating profit	(85,000,000)		(82,000,000)	(257,000,000)	(243,000,000)
Identifiable assets	4,769,000,000			4,769,000,000		5,522,000,000
Capital expenditures	1,000,000		0	4,000,000	2,000,000
Biotechnology | Operating segments
Segment Reporting Information [Line Items]
Sales	1,798,000,000		1,653,000,000	5,260,000,000	4,890,000,000
Less:
Depreciation	(38,000,000)		(36,000,000)	(110,000,000)	(113,000,000)
Amortization of intangible assets	(231,000,000)		(218,000,000)	(672,000,000)	(650,000,000)
Impairments	(86,000,000)		0	(101,000,000)	0
Other segment expenses	(1,091,000,000)		(1,009,000,000)	(3,053,000,000)	(2,950,000,000)
Operating profit	352,000,000		390,000,000	1,324,000,000	1,177,000,000
Identifiable assets	37,296,000,000			37,296,000,000		34,605,000,000
Capital expenditures	94,000,000		117,000,000	255,000,000	330,000,000
Life Sciences
Less:
Impairments		$ 0	0
Life Sciences | Operating segments
Segment Reporting Information [Line Items]
Sales	1,792,000,000		1,782,000,000	5,249,000,000	5,297,000,000
Less:
Depreciation	(47,000,000)		(44,000,000)	(137,000,000)	(123,000,000)
Amortization of intangible assets	(154,000,000)		(147,000,000)	(453,000,000)	(428,000,000)
Impairments	0		(222,000,000)	(432,000,000)	(222,000,000)
Other segment expenses	(1,369,000,000)		(1,334,000,000)	(4,043,000,000)	(4,021,000,000)
Operating profit	222,000,000		35,000,000	184,000,000	503,000,000
Identifiable assets	23,179,000,000			23,179,000,000		23,211,000,000
Capital expenditures	40,000,000		52,000,000	129,000,000	162,000,000
Diagnostics | Operating segments
Segment Reporting Information [Line Items]
Sales	2,463,000,000		2,363,000,000	7,221,000,000	7,150,000,000
Less:
Depreciation	(101,000,000)		(95,000,000)	(301,000,000)	(292,000,000)
Amortization of intangible assets	(48,000,000)		(49,000,000)	(144,000,000)	(145,000,000)
Impairments	(15,000,000)		0	(15,000,000)	0
Other segment expenses	(1,634,000,000)		(1,604,000,000)	(4,824,000,000)	(4,712,000,000)
Operating profit	665,000,000		615,000,000	1,937,000,000	2,001,000,000
Identifiable assets	14,653,000,000			14,653,000,000		$ 14,204,000,000
Capital expenditures	$ 157,000,000		$ 129,000,000	$ 397,000,000	$ 382,000,000