Reportable Business Segments, Net sales reconciliation by segment, and net sales to segment operating income reconciliation, including segment operating expenses (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) entity segment	Sep. 30, 2024 USD ($)
Segment reporting information
Number of reportable business segments | segment			3
Number of segment managers | entity			3
Net sales	$ 6,194.4	$ 4,038.8	$ 16,655.7	$ 10,904.9
Operating income	1,702.3	819.5	4,145.9	2,203.2
Harsh Environment Solutions
Segment reporting information
Net sales	1,515.8	1,193.5	4,229.3	3,155.5
Communications Solutions
Segment reporting information
Net sales	3,309.5	1,685.5	8,633.0	4,395.8
Interconnect and Sensor Systems
Segment reporting information
Net sales	1,369.1	1,159.8	3,793.4	3,353.6
Operating Segment
Segment reporting information
Net sales	6,275.1	4,083.0	16,858.9	11,026.7
Less: Segment operating expenses	4,427.8	3,106.5	12,205.9	8,433.1
Operating income	1,766.6	932.3	4,449.8	2,471.8
Operating Segment | Harsh Environment Solutions
Segment reporting information
Net sales	1,547.5	1,217.2	4,318.2	3,220.8
Less: Segment operating expenses	1,104.9	909.8	3,143.5	2,367.7
Operating income	410.9	283.7	1,085.8	787.8
Operating Segment | Communications Solutions
Segment reporting information
Net sales	3,343.0	1,698.1	8,706.5	4,433.0
Less: Segment operating expenses	2,228.2	1,254.5	6,000.2	3,328.1
Operating income	1,081.3	431.0	2,632.8	1,067.7
Operating Segment | Interconnect and Sensor Systems
Segment reporting information
Net sales	1,384.6	1,167.7	3,834.2	3,372.9
Less: Segment operating expenses	1,094.7	942.2	3,062.2	2,737.3
Operating income	274.4	217.6	731.2	616.3
Inter-Segment
Segment reporting information
Net sales	80.7	44.2	203.2	121.8
Inter-Segment | Harsh Environment Solutions
Segment reporting information
Net sales	31.7	23.7	88.9	65.3
Inter-Segment | Communications Solutions
Segment reporting information
Net sales	33.5	12.6	73.5	37.2
Inter-Segment | Interconnect and Sensor Systems
Segment reporting information
Net sales	$ 15.5	$ 7.9	$ 40.8	$ 19.3