Business Segment and Geographical Information - Schedule of Business Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Consolidated revenues	$ 42,879	$ 42,857	$ 44,915
Selling, general and administrative expenses	8,595	8,445	8,993
Research and development expenses	1,390	1,337	1,471
Segment income	7,337	6,859	8,393
Restructuring and other costs	(379)	(459)	(114)
Amortization of acquisition-related intangible assets	(1,952)	(2,338)	(2,395)
Interest income	1,078	879	272
Interest expense	(1,390)	(1,375)	(726)
Other income/(expense)	12	(65)	(104)
Income before income taxes	7,037	6,298	7,835
Segment assets	97,321	98,726	97,154
Purchases of property, plant and equipment	1,400	1,479	2,243
Depreciation of property, plant and equipment	1,156	1,068	986
Life Sciences Solutions
Segment Reporting Information [Line Items]
Consolidated revenues	8,160	8,545	11,565
Analytical Instruments
Segment Reporting Information [Line Items]
Consolidated revenues	7,267	7,101	6,441
Specialty Diagnostics
Segment Reporting Information [Line Items]
Consolidated revenues	4,449	4,324	4,604
Laboratory Products and Biopharma Services
Segment Reporting Information [Line Items]
Consolidated revenues	23,002	22,888	22,304
Elimination of intersegment revenues
Segment Reporting Information [Line Items]
Consolidated revenues	1,885	1,829	2,515
Elimination of intersegment revenues | Life Sciences Solutions
Segment Reporting Information [Line Items]
Consolidated revenues	1,471	1,432	1,967
Elimination of intersegment revenues | Analytical Instruments
Segment Reporting Information [Line Items]
Consolidated revenues	196	163	182
Elimination of intersegment revenues | Specialty Diagnostics
Segment Reporting Information [Line Items]
Consolidated revenues	63	82	158
Elimination of intersegment revenues | Laboratory Products and Biopharma Services
Segment Reporting Information [Line Items]
Consolidated revenues	155	154	207
Operating Segments
Segment Reporting Information [Line Items]
Consolidated revenues	44,764	44,686	47,430
Segment income	9,707	9,810	10,985
Operating Segments | Life Sciences Solutions
Segment Reporting Information [Line Items]
Consolidated revenues	9,631	9,977	13,532
Cost of revenues	3,559	4,072	4,973
Selling, general and administrative expenses	1,799	1,791	2,027
Research and development expenses	551	558	680
Other segment items	219	136	270
Segment income	3,503	3,420	5,582
Restructuring and other costs	(69)	(105)	(30)
Segment assets	2,982	3,186	3,845
Purchases of property, plant and equipment	123	178	490
Depreciation of property, plant and equipment	230	220	214
Operating Segments | Analytical Instruments
Segment Reporting Information [Line Items]
Consolidated revenues	7,463	7,263	6,624
Cost of revenues	3,535	3,468	3,194
Selling, general and administrative expenses	1,251	1,252	1,235
Research and development expenses	554	528	508
Other segment items	167	107	180
Segment income	1,955	1,908	1,507
Restructuring and other costs	(4)	(33)	(1)
Segment assets	2,944	2,726	2,465
Purchases of property, plant and equipment	95	87	140
Depreciation of property, plant and equipment	103	93	83
Operating Segments | Specialty Diagnostics
Segment Reporting Information [Line Items]
Consolidated revenues	4,512	4,405	4,763
Cost of revenues	2,605	2,592	3,095
Selling, general and administrative expenses	741	724	605
Research and development expenses	176	156	147
Other segment items	(168)	(191)	(108)
Segment income	1,159	1,124	1,024
Restructuring and other costs	(17)	(11)	(68)
Segment assets	1,218	1,150	1,076
Purchases of property, plant and equipment	125	121	112
Depreciation of property, plant and equipment	104	86	75
Operating Segments | Laboratory Products and Biopharma Services
Segment Reporting Information [Line Items]
Consolidated revenues	23,157	23,041	22,511
Cost of revenues	18,074	18,033	17,830
Selling, general and administrative expenses	2,378	2,304	2,347
Research and development expenses	73	68	85
Other segment items	(459)	(722)	(623)
Segment income	3,090	3,358	2,872
Restructuring and other costs	(280)	(295)	(12)
Segment assets	6,145	6,350	6,428
Purchases of property, plant and equipment	971	1,013	1,403
Depreciation of property, plant and equipment	721	669	614
Segment Reconciling Items
Segment Reporting Information [Line Items]
Cost of revenues adjustments	(47)	(95)	(46)
Selling, general and administrative expenses adjustments	8	(59)	(37)
Restructuring and other costs	(379)	(459)	(114)
Amortization of acquisition-related intangible assets	(1,952)	(2,338)	(2,395)
Segment assets	84,031	85,314	83,340
Purchases of property, plant and equipment	85	80	98
Depreciation of property, plant and equipment	0	0	0
Corporate
Segment Reporting Information [Line Items]
Restructuring and other costs	$ (9)	$ (15)	$ (3)