Revenue (Disaggregation of Revenue by Geographical Region) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2026	Jun. 27, 2025	Jun. 26, 2026	Jun. 27, 2025
Disaggregation of Revenue [Line Items]
Sales	$ 6,265	$ 5,936	$ 12,216	$ 11,677
Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	5,200	4,970	10,231	9,786
Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,065	966	1,985	1,891
North America
Disaggregation of Revenue [Line Items]
Sales	2,474	2,438	4,952	5,020
Western Europe
Disaggregation of Revenue [Line Items]
Sales	1,540	1,507	3,105	2,851
Other developed markets
Disaggregation of Revenue [Line Items]
Sales	293	294	577	572
High-growth markets
Disaggregation of Revenue [Line Items]
Sales	1,958	1,697	3,582	3,234
Operating segments
Disaggregation of Revenue [Line Items]
Sales	6,265	5,936	12,216	11,677
Operating segments \| Biotechnology
Disaggregation of Revenue [Line Items]
Sales	1,920	1,850	3,717	3,462
Operating segments \| Biotechnology \| Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,722	1,694	3,364	3,151
Operating segments \| Biotechnology \| Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	198	156	353	311
Operating segments \| Biotechnology \| North America
Disaggregation of Revenue [Line Items]
Sales	583	612	1,107	1,155
Operating segments \| Biotechnology \| Western Europe
Disaggregation of Revenue [Line Items]
Sales	689	708	1,415	1,274
Operating segments \| Biotechnology \| Other developed markets
Disaggregation of Revenue [Line Items]
Sales	74	82	131	146
Operating segments \| Biotechnology \| High-growth markets
Disaggregation of Revenue [Line Items]
Sales	574	448	1,064	887
Operating segments \| Life Sciences
Disaggregation of Revenue [Line Items]
Sales	1,879	1,777	3,616	3,457
Operating segments \| Life Sciences \| Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,268	1,214	2,471	2,350
Operating segments \| Life Sciences \| Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	611	563	1,145	1,107
Operating segments \| Life Sciences \| North America
Disaggregation of Revenue [Line Items]
Sales	759	762	1,448	1,483
Operating segments \| Life Sciences \| Western Europe
Disaggregation of Revenue [Line Items]
Sales	421	394	829	772
Operating segments \| Life Sciences \| Other developed markets
Disaggregation of Revenue [Line Items]
Sales	126	118	267	241
Operating segments \| Life Sciences \| High-growth markets
Disaggregation of Revenue [Line Items]
Sales	573	503	1,072	961
Operating segments \| Diagnostics
Disaggregation of Revenue [Line Items]
Sales	2,466	2,309	4,883	4,758
Operating segments \| Diagnostics \| Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,210	2,062	4,396	4,285
Operating segments \| Diagnostics \| Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	256	247	487	473
Operating segments \| Diagnostics \| North America
Disaggregation of Revenue [Line Items]
Sales	1,132	1,064	2,397	2,382
Operating segments \| Diagnostics \| Western Europe
Disaggregation of Revenue [Line Items]
Sales	430	405	861	805
Operating segments \| Diagnostics \| Other developed markets
Disaggregation of Revenue [Line Items]
Sales	93	94	179	185
Operating segments \| Diagnostics \| High-growth markets
Disaggregation of Revenue [Line Items]
Sales	$ 811	$ 746	$ 1,446	$ 1,386