Segment and Geographic Area Information - Depreciation and Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Depreciation	$ 1,277	$ 1,254	$ 1,491
Additions to Property and Equipment	2,209	1,775	1,872
Total Assets	73,214	74,438
Operating Segments
Segment Reporting Information [Line Items]
Depreciation	1,073	1,057	1,290
Additions to Property and Equipment	1,996	1,593	1,671
Total Assets	24,184	22,337	21,174
Operating Segments | Established Pharmaceuticals
Segment Reporting Information [Line Items]
Depreciation	104	97	94
Additions to Property and Equipment	185	175	169
Total Assets	3,118	2,883	2,789
Operating Segments | Nutritionals
Segment Reporting Information [Line Items]
Depreciation	155	155	151
Additions to Property and Equipment	457	251	174
Total Assets	4,270	3,625	3,425
Operating Segments | Diagnostics
Segment Reporting Information [Line Items]
Depreciation	499	494	760
Additions to Property and Equipment	750	832	980
Total Assets	7,767	7,985	7,699
Operating Segments | Medical Devices
Segment Reporting Information [Line Items]
Depreciation	315	311	285
Additions to Property and Equipment	604	335	348
Total Assets	9,029	7,844	7,261
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Depreciation	204	197	201
Additions to Property and Equipment	$ 213	$ 182	$ 201