Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2026	Sep. 27, 2025	Oct. 03, 2026	Sep. 27, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 3,376	$ 3,009	$ 9,223	$ 8,302
Direct
Disaggregation of Revenue [Line Items]
Revenue	2,514	2,193	6,851	6,162
Indirect
Disaggregation of Revenue [Line Items]
Revenue	862	816	2,372	2,140
Mission Critical Networks (MCN)
Disaggregation of Revenue [Line Items]
Revenue	2,511	2,241	6,759	6,147
Video
Disaggregation of Revenue [Line Items]
Revenue	594	534	1,687	1,498
Command Center
Disaggregation of Revenue [Line Items]
Revenue	271	234	777	657
North America
Disaggregation of Revenue [Line Items]
Revenue	2,329	2,121	6,396	6,000
International
Disaggregation of Revenue [Line Items]
Revenue	1,047	888	2,827	2,302
Products and Systems Integration
Disaggregation of Revenue [Line Items]
Revenue	2,118	1,897	5,586	5,095
Products and Systems Integration \| Direct
Disaggregation of Revenue [Line Items]
Revenue	1,367	1,187	3,538	3,233
Products and Systems Integration \| Indirect
Disaggregation of Revenue [Line Items]
Revenue	751	710	2,048	1,862
Products and Systems Integration \| Mission Critical Networks (MCN)
Disaggregation of Revenue [Line Items]
Revenue	1,784	1,598	4,639	4,269
Products and Systems Integration \| Video
Disaggregation of Revenue [Line Items]
Revenue	334	299	947	826
Products and Systems Integration \| Command Center
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Products and Systems Integration \| North America
Disaggregation of Revenue [Line Items]
Revenue	1,469	1,360	3,895	3,789
Products and Systems Integration \| International
Disaggregation of Revenue [Line Items]
Revenue	649	537	1,691	1,306
Software and Services
Disaggregation of Revenue [Line Items]
Revenue	1,258	1,112	3,637	3,207
Software and Services \| Direct
Disaggregation of Revenue [Line Items]
Revenue	1,147	1,006	3,313	2,929
Software and Services \| Indirect
Disaggregation of Revenue [Line Items]
Revenue	111	106	324	278
Software and Services \| Mission Critical Networks (MCN)
Disaggregation of Revenue [Line Items]
Revenue	727	643	2,120	1,878
Software and Services \| Video
Disaggregation of Revenue [Line Items]
Revenue	260	235	740	672
Software and Services \| Command Center
Disaggregation of Revenue [Line Items]
Revenue	271	234	777	657
Software and Services \| North America
Disaggregation of Revenue [Line Items]
Revenue	860	761	2,501	2,211
Software and Services \| International
Disaggregation of Revenue [Line Items]
Revenue	$ 398	$ 351	$ 1,136	$ 996