Segment Information (Segment Results) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 29, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jul. 01, 2022	Apr. 01, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Sales	$ 6,405	$ 5,624	$ 5,912	$ 5,949	$ 7,134	$ 6,455	$ 6,528	$ 6,526	$ 23,890	$ 26,643	$ 24,802
Operating profit	1,337	$ 1,185	$ 1,163	$ 1,517	1,997	$ 1,717	$ 1,891	$ 1,931	5,202	7,536	6,377
Depreciation and amortization of intangible assets									2,166	2,132	2,062
Identifiable assets	84,488				84,350				84,488	84,350	83,184
Capital expenditures, gross									1,383	1,118	1,240
Discontinued operations
Segment Reporting Information [Line Items]
Identifiable assets	0				4,781				0	4,781	4,837
Other
Segment Reporting Information [Line Items]
Operating profit									(322)	(322)	(303)
Depreciation and amortization of intangible assets									5	9	7
Capital expenditures, gross									100	6	1
Other | Continuing operations
Segment Reporting Information [Line Items]
Identifiable assets	8,785				9,739				8,785	9,739	5,407
Biotechnology | Operating segments
Segment Reporting Information [Line Items]
Sales									7,172	8,758	8,570
Operating profit									1,909	3,008	3,074
Depreciation and amortization of intangible assets									1,026	1,002	1,059
Capital expenditures, gross									417	405	385
Biotechnology | Operating segments | Continuing operations
Segment Reporting Information [Line Items]
Identifiable assets	37,421				37,536				37,421	37,536	38,118
Life Sciences | Operating segments
Segment Reporting Information [Line Items]
Sales									7,141	7,036	6,388
Operating profit									1,209	1,414	1,293
Depreciation and amortization of intangible assets									558	531	382
Capital expenditures, gross									320	325	210
Life Sciences | Operating segments | Continuing operations
Segment Reporting Information [Line Items]
Identifiable assets	23,730				17,572				23,730	17,572	19,768
Diagnostics | Operating segments
Segment Reporting Information [Line Items]
Sales									9,577	10,849	9,844
Operating profit									2,406	3,436	2,313
Depreciation and amortization of intangible assets									577	590	614
Capital expenditures, gross									546	382	644
Diagnostics | Operating segments | Continuing operations
Segment Reporting Information [Line Items]
Identifiable assets	$ 14,552				$ 14,722				$ 14,552	$ 14,722	$ 15,054