Revenue (Disaggregation of Revenue by Geographical Region) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Jun. 27, 2025	Jun. 28, 2024
Disaggregation of Revenue [Line Items]
Sales	$ 5,936	$ 5,743	$ 11,677	$ 11,539
Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	4,970	4,689	9,786	9,484
Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	966	1,054	1,891	2,055
North America
Disaggregation of Revenue [Line Items]
Sales	2,438	2,434	5,020	5,066
Western Europe
Disaggregation of Revenue [Line Items]
Sales	1,507	1,321	2,851	2,645
Other developed markets
Disaggregation of Revenue [Line Items]
Sales	294	292	572	595
High-growth markets
Disaggregation of Revenue [Line Items]
Sales	1,697	1,696	3,234	3,233
Operating segments | Biotechnology
Disaggregation of Revenue [Line Items]
Sales	1,850	1,713	3,462	3,237
Operating segments | Biotechnology | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,694	1,478	3,151	2,787
Operating segments | Biotechnology | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	156	235	311	450
Operating segments | Biotechnology | North America
Disaggregation of Revenue [Line Items]
Sales	612	607	1,155	1,121
Operating segments | Biotechnology | Western Europe
Disaggregation of Revenue [Line Items]
Sales	708	567	1,274	1,113
Operating segments | Biotechnology | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	82	81	146	160
Operating segments | Biotechnology | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	448	458	887	843
Operating segments | Life Sciences
Disaggregation of Revenue [Line Items]
Sales	1,777	1,770	3,457	3,515
Operating segments | Life Sciences | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,214	1,208	2,350	2,400
Operating segments | Life Sciences | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	563	562	1,107	1,115
Operating segments | Life Sciences | North America
Disaggregation of Revenue [Line Items]
Sales	762	785	1,483	1,566
Operating segments | Life Sciences | Western Europe
Disaggregation of Revenue [Line Items]
Sales	394	374	772	746
Operating segments | Life Sciences | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	118	116	241	241
Operating segments | Life Sciences | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	503	495	961	962
Operating segments | Diagnostics
Disaggregation of Revenue [Line Items]
Sales	2,309	2,260	4,758	4,787
Operating segments | Diagnostics | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,062	2,003	4,285	4,297
Operating segments | Diagnostics | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	247	257	473	490
Operating segments | Diagnostics | North America
Disaggregation of Revenue [Line Items]
Sales	1,064	1,042	2,382	2,379
Operating segments | Diagnostics | Western Europe
Disaggregation of Revenue [Line Items]
Sales	405	380	805	786
Operating segments | Diagnostics | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	94	95	185	194
Operating segments | Diagnostics | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	$ 746	$ 743	$ 1,386	$ 1,428