Revenue (Disaggregation of Revenue by Geographical Region) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2025	Mar. 29, 2024
Disaggregation of Revenue [Line Items]
Sales	$ 5,741	$ 5,796
Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	4,816	4,795
Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	925	1,001
North America
Disaggregation of Revenue [Line Items]
Sales	2,582	2,632
Western Europe
Disaggregation of Revenue [Line Items]
Sales	1,344	1,324
Other developed markets
Disaggregation of Revenue [Line Items]
Sales	278	303
High-growth markets
Disaggregation of Revenue [Line Items]
Sales	1,537	1,537
Operating segments | Biotechnology
Disaggregation of Revenue [Line Items]
Sales	1,612	1,524
Operating segments | Biotechnology | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,457	1,309
Operating segments | Biotechnology | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	155	215
Operating segments | Biotechnology | North America
Disaggregation of Revenue [Line Items]
Sales	543	514
Operating segments | Biotechnology | Western Europe
Disaggregation of Revenue [Line Items]
Sales	566	546
Operating segments | Biotechnology | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	64	79
Operating segments | Biotechnology | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	439	385
Operating segments | Life Sciences
Disaggregation of Revenue [Line Items]
Sales	1,680	1,745
Operating segments | Life Sciences | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,136	1,192
Operating segments | Life Sciences | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	544	553
Operating segments | Life Sciences | North America
Disaggregation of Revenue [Line Items]
Sales	721	781
Operating segments | Life Sciences | Western Europe
Disaggregation of Revenue [Line Items]
Sales	378	372
Operating segments | Life Sciences | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	123	125
Operating segments | Life Sciences | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	458	467
Operating segments | Diagnostics
Disaggregation of Revenue [Line Items]
Sales	2,449	2,527
Operating segments | Diagnostics | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,223	2,294
Operating segments | Diagnostics | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	226	233
Operating segments | Diagnostics | North America
Disaggregation of Revenue [Line Items]
Sales	1,318	1,337
Operating segments | Diagnostics | Western Europe
Disaggregation of Revenue [Line Items]
Sales	400	406
Operating segments | Diagnostics | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	91	99
Operating segments | Diagnostics | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	$ 640	$ 685