Revenue (Disaggregation of Revenue by Geographical Region) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2026	Sep. 26, 2025	Sep. 25, 2026	Sep. 26, 2025
Disaggregation of Revenue [Line Items]
Sales	$ 6,554	$ 6,053	$ 18,770	$ 17,730
Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	5,399	5,017	15,630	14,803
Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,155	1,036	3,140	2,927
North America
Disaggregation of Revenue [Line Items]
Sales	2,740	2,580	7,692	7,600
Western Europe
Disaggregation of Revenue [Line Items]
Sales	1,490	1,396	4,595	4,247
Other developed markets
Disaggregation of Revenue [Line Items]
Sales	298	316	875	888
High-growth markets
Disaggregation of Revenue [Line Items]
Sales	2,026	1,761	5,608	4,995
Operating segments
Disaggregation of Revenue [Line Items]
Sales	6,554	6,053	18,770	17,730
Operating segments \| Biotechnology
Disaggregation of Revenue [Line Items]
Sales	1,807	1,798	5,524	5,260
Operating segments \| Biotechnology \| Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,584	1,590	4,948	4,741
Operating segments \| Biotechnology \| Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	223	208	576	519
Operating segments \| Biotechnology \| North America
Disaggregation of Revenue [Line Items]
Sales	550	624	1,657	1,779
Operating segments \| Biotechnology \| Western Europe
Disaggregation of Revenue [Line Items]
Sales	605	587	2,020	1,861
Operating segments \| Biotechnology \| Other developed markets
Disaggregation of Revenue [Line Items]
Sales	58	89	189	235
Operating segments \| Biotechnology \| High-growth markets
Disaggregation of Revenue [Line Items]
Sales	594	498	1,658	1,385
Operating segments \| Life Sciences
Disaggregation of Revenue [Line Items]
Sales	1,865	1,792	5,481	5,249
Operating segments \| Life Sciences \| Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,282	1,216	3,753	3,566
Operating segments \| Life Sciences \| Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	583	576	1,728	1,683
Operating segments \| Life Sciences \| North America
Disaggregation of Revenue [Line Items]
Sales	751	728	2,199	2,211
Operating segments \| Life Sciences \| Western Europe
Disaggregation of Revenue [Line Items]
Sales	411	392	1,240	1,164
Operating segments \| Life Sciences \| Other developed markets
Disaggregation of Revenue [Line Items]
Sales	132	130	399	371
Operating segments \| Life Sciences \| High-growth markets
Disaggregation of Revenue [Line Items]
Sales	571	542	1,643	1,503
Operating segments \| Diagnostics
Disaggregation of Revenue [Line Items]
Sales	2,882	2,463	7,765	7,221
Operating segments \| Diagnostics \| Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,533	2,211	6,929	6,496
Operating segments \| Diagnostics \| Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	349	252	836	725
Operating segments \| Diagnostics \| North America
Disaggregation of Revenue [Line Items]
Sales	1,439	1,228	3,836	3,610
Operating segments \| Diagnostics \| Western Europe
Disaggregation of Revenue [Line Items]
Sales	474	417	1,335	1,222
Operating segments \| Diagnostics \| Other developed markets
Disaggregation of Revenue [Line Items]
Sales	108	97	287	282
Operating segments \| Diagnostics \| High-growth markets
Disaggregation of Revenue [Line Items]
Sales	$ 861	$ 721	$ 2,307	$ 2,107