Revenue (Disaggregation of Revenue by Geographical Region) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024
Disaggregation of Revenue [Line Items]
Sales	$ 6,053	$ 5,798	$ 17,730	$ 17,337
Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	5,017	4,777	14,803	14,261
Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,036	1,021	2,927	3,076
North America
Disaggregation of Revenue [Line Items]
Sales	2,580	2,456	7,600	7,522
Western Europe
Disaggregation of Revenue [Line Items]
Sales	1,396	1,320	4,247	3,965
Other developed markets
Disaggregation of Revenue [Line Items]
Sales	316	299	888	894
High-growth markets
Disaggregation of Revenue [Line Items]
Sales	1,761	1,723	4,995	4,956
Operating segments | Biotechnology
Disaggregation of Revenue [Line Items]
Sales	1,798	1,653	5,260	4,890
Operating segments | Biotechnology | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,590	1,422	4,741	4,209
Operating segments | Biotechnology | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	208	231	519	681
Operating segments | Biotechnology | North America
Disaggregation of Revenue [Line Items]
Sales	624	503	1,779	1,624
Operating segments | Biotechnology | Western Europe
Disaggregation of Revenue [Line Items]
Sales	587	587	1,861	1,700
Operating segments | Biotechnology | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	89	78	235	238
Operating segments | Biotechnology | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	498	485	1,385	1,328
Operating segments | Life Sciences
Disaggregation of Revenue [Line Items]
Sales	1,792	1,782	5,249	5,297
Operating segments | Life Sciences | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,216	1,228	3,566	3,628
Operating segments | Life Sciences | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	576	554	1,683	1,669
Operating segments | Life Sciences | North America
Disaggregation of Revenue [Line Items]
Sales	728	796	2,211	2,362
Operating segments | Life Sciences | Western Europe
Disaggregation of Revenue [Line Items]
Sales	392	365	1,164	1,111
Operating segments | Life Sciences | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	130	120	371	361
Operating segments | Life Sciences | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	542	501	1,503	1,463
Operating segments | Diagnostics
Disaggregation of Revenue [Line Items]
Sales	2,463	2,363	7,221	7,150
Operating segments | Diagnostics | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,211	2,127	6,496	6,424
Operating segments | Diagnostics | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	252	236	725	726
Operating segments | Diagnostics | North America
Disaggregation of Revenue [Line Items]
Sales	1,228	1,157	3,610	3,536
Operating segments | Diagnostics | Western Europe
Disaggregation of Revenue [Line Items]
Sales	417	368	1,222	1,154
Operating segments | Diagnostics | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	97	101	282	295
Operating segments | Diagnostics | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	$ 721	$ 737	$ 2,107	$ 2,165