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Segment Information - Financial Information by Reportable Segment (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Net sales	$ 1,054.0	$ 782.0	$ 2,826.4	$ 2,253.9
Reportable segment income	166.3	133.2	453.0	410.0
Cost of goods sold	659.3	470.9	1,746.2	1,344.3
Selling, general and administrative	207.8	161.8	570.0	450.7
Research and development	20.6	16.1	57.2	48.9
Systems Protection
Segment Reporting Information [Line Items]
Net sales	715.6	477.1	1,855.8	1,357.8
Electrical Connections
Segment Reporting Information [Line Items]
Net sales	338.4	304.9	970.6	896.1
Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,054.0	782.0	2,826.4	2,253.9
Reportable segment income	247.8	197.0	669.1	573.3
Operating Segments | Systems Protection
Segment Reporting Information [Line Items]
Net sales	715.6	477.1	1,855.8	1,357.8
Reportable segment income	146.2	104.4	387.5	303.0
Cost of goods sold	470.5	302.7	1,196.9	853.3
Selling, general and administrative	85.7	60.8	236.0	174.6
Research and development	13.2	9.2	35.4	26.9
Operating Segments | Electrical Connections
Segment Reporting Information [Line Items]
Net sales	338.4	304.9	970.6	896.1
Reportable segment income	101.6	92.6	281.6	270.3
Cost of goods sold	184.9	164.2	536.5	479.1
Selling, general and administrative	46.3	42.5	136.1	128.6
Research and development	$ 5.6	$ 5.6	$ 16.4	$ 18.1

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