Segment Information (Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2025	Mar. 29, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Sales	$ 5,741	$ 5,796
Less:
Depreciation	(181)	(179)
Amortization of intangible assets	(410)	(407)
Other segment expenses	(3,876)	(3,898)
Operating profit	1,274	1,312
Identifiable assets	79,116		$ 77,542
Capital expenditures	245	291
Other
Segment Reporting Information [Line Items]
Sales	0	0
Less:
Depreciation	(2)	(2)
Amortization of intangible assets	0	0
Other segment expenses	(84)	(76)
Operating profit	(86)	(78)
Identifiable assets	5,308		5,522
Capital expenditures	1	2
Biotechnology | Operating segments
Segment Reporting Information [Line Items]
Sales	1,612	1,524
Less:
Depreciation	(34)	(42)
Amortization of intangible assets	(213)	(218)
Other segment expenses	(924)	(939)
Operating profit	441	325
Identifiable assets	36,121		34,605
Capital expenditures	81	102
Life Sciences | Operating segments
Segment Reporting Information [Line Items]
Sales	1,680	1,745
Less:
Depreciation	(45)	(38)
Amortization of intangible assets	(149)	(141)
Other segment expenses	(1,285)	(1,331)
Operating profit	201	235
Identifiable assets	23,396		23,211
Capital expenditures	48	60
Diagnostics | Operating segments
Segment Reporting Information [Line Items]
Sales	2,449	2,527
Less:
Depreciation	(100)	(97)
Amortization of intangible assets	(48)	(48)
Other segment expenses	(1,583)	(1,552)
Operating profit	718	830
Identifiable assets	14,291		$ 14,204
Capital expenditures	$ 115	$ 127