Revenue (Disaggregation of Revenue by Geographical Region) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Oct. 01, 2021	Oct. 02, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 7,229	$ 5,884	$ 21,305	$ 15,524
Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	5,419	4,228	15,818	11,250
Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,810	1,656	5,487	4,274
North America
Disaggregation of Revenue [Line Items]
Sales	2,886	2,380	8,429	6,395
Western Europe
Disaggregation of Revenue [Line Items]
Sales	1,669	1,374	5,103	3,658
Other developed markets
Disaggregation of Revenue [Line Items]
Sales	356	326	1,078	910
High-growth markets
Disaggregation of Revenue [Line Items]
Sales	2,318	1,804	6,695	4,561
Operating segments | Life Sciences
Disaggregation of Revenue [Line Items]
Sales	3,632	2,923	10,912	7,215
Operating segments | Life Sciences | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,591	2,076	7,760	5,135
Operating segments | Life Sciences | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	1,041	847	3,152	2,080
Operating segments | Life Sciences | North America
Disaggregation of Revenue [Line Items]
Sales	1,291	1,101	3,903	2,721
Operating segments | Life Sciences | Western Europe
Disaggregation of Revenue [Line Items]
Sales	989	780	3,011	1,963
Operating segments | Life Sciences | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	202	193	636	524
Operating segments | Life Sciences | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	1,150	849	3,362	2,007
Operating segments | Diagnostics
Disaggregation of Revenue [Line Items]
Sales	2,449	1,889	6,963	5,176
Operating segments | Diagnostics | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	2,150	1,542	6,074	4,305
Operating segments | Diagnostics | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	299	347	889	871
Operating segments | Diagnostics | North America
Disaggregation of Revenue [Line Items]
Sales	1,083	798	3,025	2,244
Operating segments | Diagnostics | Western Europe
Disaggregation of Revenue [Line Items]
Sales	424	349	1,282	974
Operating segments | Diagnostics | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	126	104	355	298
Operating segments | Diagnostics | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	816	638	2,301	1,660
Operating segments | Environmental & Applied Solutions
Disaggregation of Revenue [Line Items]
Sales	1,148	1,072	3,430	3,133
Operating segments | Environmental & Applied Solutions | Recurring revenue
Disaggregation of Revenue [Line Items]
Sales	678	610	1,984	1,810
Operating segments | Environmental & Applied Solutions | Nonrecurring revenue
Disaggregation of Revenue [Line Items]
Sales	470	462	1,446	1,323
Operating segments | Environmental & Applied Solutions | North America
Disaggregation of Revenue [Line Items]
Sales	512	481	1,501	1,430
Operating segments | Environmental & Applied Solutions | Western Europe
Disaggregation of Revenue [Line Items]
Sales	256	245	810	721
Operating segments | Environmental & Applied Solutions | Other developed markets
Disaggregation of Revenue [Line Items]
Sales	28	29	87	88
Operating segments | Environmental & Applied Solutions | High-growth markets
Disaggregation of Revenue [Line Items]
Sales	$ 352	$ 317	$ 1,032	$ 894