Reportable Business Segments and International Operations, Net sales reconciliation by segment, and net sales to segment operating income reconciliation, including segment operating expenses (Details) $ in Millions		12 Months Ended
	Jan. 01, 2022 segment individual	Dec. 31, 2024 USD ($) segment individual	Dec. 31, 2023 USD ($) segment individual	Dec. 31, 2022 USD ($) segment individual
Segment reporting information
Number of reportable business segments | segment	3	3	3	3
Number of segment managers | individual	3	3	3	3
Net sales		$ 15,222.7	$ 12,554.7	$ 12,623.0
Operating income		3,156.9	2,559.6	2,585.8
Harsh Environment Solutions
Segment reporting information
Net sales		4,417.4	3,530.8	3,107.2
Communications Solutions
Segment reporting information
Net sales		6,323.8	4,912.8	5,652.4
Interconnect and Sensor Systems
Segment reporting information
Net sales		4,481.5	4,111.1	3,863.4
Operating Segment
Segment reporting information
Net sales		15,394.8	12,713.9	12,797.7
Less: Segment operating expenses		11,734.0	9,793.6	9,859.2
Operating income		3,488.7	2,761.1	2,763.8
Operating Segment | Harsh Environment Solutions
Segment reporting information
Net sales		4,508.6	3,621.6	3,185.3
Less: Segment operating expenses		3,324.2	2,586.9	2,305.6
Operating income		1,093.2	943.9	801.6
Operating Segment | Communications Solutions
Segment reporting information
Net sales		6,375.6	4,963.0	5,731.8
Less: Segment operating expenses		4,754.2	3,849.3	4,406.7
Operating income		1,569.6	1,063.5	1,245.7
Operating Segment | Interconnect and Sensor Systems
Segment reporting information
Net sales		4,510.6	4,129.3	3,880.6
Less: Segment operating expenses		3,655.6	3,357.4	3,146.9
Operating income		825.9	753.7	716.5
Inter-Segment
Segment reporting information
Net sales		172.1	159.2	174.7
Inter-Segment | Harsh Environment Solutions
Segment reporting information
Net sales		91.2	90.8	78.1
Inter-Segment | Communications Solutions
Segment reporting information
Net sales		51.8	50.2	79.4
Inter-Segment | Interconnect and Sensor Systems
Segment reporting information
Net sales		$ 29.1	$ 18.2	$ 17.2