Segment Information (Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2026	Mar. 28, 2025	Dec. 31, 2025
Segment Reporting Information [Line Items]
Sales	$ 5,951	$ 5,741
Less:
Depreciation	(193)	(181)
Amortization of intangible assets	(434)	(410)
Other segment items	(3,980)	(3,876)
Operating profit	1,344	1,274
Identifiable assets	83,544		$ 83,464
Capital expenditures	237	245
Operating segments
Segment Reporting Information [Line Items]
Sales	5,951	5,741
Less:
Depreciation	(190)	(179)
Amortization of intangible assets	(434)	(410)
Other segment items	(3,894)	(3,792)
Operating profit	1,433	1,360
Other
Segment Reporting Information [Line Items]
Sales	0	0
Less:
Depreciation	(3)	(2)
Amortization of intangible assets	0	0
Other segment items	(86)	(84)
Operating profit	(89)	(86)
Identifiable assets	9,317		8,267
Capital expenditures	2	1
Biotechnology | Operating segments
Segment Reporting Information [Line Items]
Sales	1,797	1,612
Less:
Depreciation	(40)	(34)
Amortization of intangible assets	(234)	(213)
Other segment items	(989)	(924)
Operating profit	534	441
Identifiable assets	36,697		37,337
Capital expenditures	64	81
Life Sciences | Operating segments
Segment Reporting Information [Line Items]
Sales	1,737	1,680
Less:
Depreciation	(48)	(45)
Amortization of intangible assets	(152)	(149)
Other segment items	(1,312)	(1,285)
Operating profit	225	201
Identifiable assets	22,873		23,112
Capital expenditures	27	48
Diagnostics | Operating segments
Segment Reporting Information [Line Items]
Sales	2,417	2,449
Less:
Depreciation	(102)	(100)
Amortization of intangible assets	(48)	(48)
Other segment items	(1,593)	(1,583)
Operating profit	674	718
Identifiable assets	14,657		$ 14,748
Capital expenditures	$ 144	$ 115