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	6 Months Ended
Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) entity segment	Jun. 30, 2025 USD ($)
Segment reporting information
Number of reportable business segments \| segment			3
Number of segment managers \| entity			3
Net sales	$ 8,758.1	$ 5,650.3	$ 16,378.2	$ 10,461.3
Segment operating income	2,584.6	1,418.8	4,416.4	2,443.6
Communications Solutions
Segment reporting information
Net sales	5,383.6	2,909.8	9,918.3	5,323.5
Harsh Environment Solutions
Segment reporting information
Net sales	1,856.8	1,445.2	3,549.9	2,713.4
Interconnect and Sensor Systems
Segment reporting information
Net sales	1,517.7	1,295.3	2,910.0	2,424.4
Operating Segment
Segment reporting information
Net sales	8,872.1	5,720.4	16,571.8	10,583.8
Less: Segment operating expenses	6,071.6	4,143.6	11,547.3	7,778.1
Segment operating income	2,686.5	1,506.7	4,830.9	2,683.2
Operating Segment \| Communications Solutions
Segment reporting information
Net sales	5,427.1	2,934.0	9,988.2	5,363.5
Less: Segment operating expenses	3,575.3	2,019.1	6,720.6	3,772.0
Segment operating income	1,808.3	890.7	3,197.7	1,551.5
Operating Segment \| Harsh Environment Solutions
Segment reporting information
Net sales	1,898.3	1,475.6	3,623.6	2,770.6
Less: Segment operating expenses	1,297.5	1,081.5	2,517.3	2,038.5
Segment operating income	559.3	363.7	1,032.6	674.9
Operating Segment \| Interconnect and Sensor Systems
Segment reporting information
Net sales	1,546.7	1,310.8	2,960.0	2,449.7
Less: Segment operating expenses	1,198.8	1,043.0	2,309.4	1,967.6
Segment operating income	318.9	252.3	600.6	456.8
Inter-Segment
Segment reporting information
Net sales	114.0	70.1	193.6	122.5
Inter-Segment \| Communications Solutions
Segment reporting information
Net sales	43.5	24.2	69.9	40.0
Inter-Segment \| Harsh Environment Solutions
Segment reporting information
Net sales	41.5	30.4	73.7	57.2
Inter-Segment \| Interconnect and Sensor Systems
Segment reporting information
Net sales	$ 29.0	$ 15.5	$ 50.0	$ 25.3

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