Segment Information - Financial Information by Reportable Segment (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($) segment	Mar. 31, 2025 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Net sales	$ 1,242.0	$ 809.3
Reportable segment income	195.7	130.0
Cost of goods sold	796.4	495.6
Selling, general and administrative	227.2	166.2
Research and development	22.7	17.5
Systems Protection
Segment Reporting Information [Line Items]
Net sales	894.8	508.2
Electrical Connections
Segment Reporting Information [Line Items]
Net sales	347.2	301.1
Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,242.0	809.3
Reportable segment income	287.9	189.3
Operating Segments | Systems Protection
Segment Reporting Information [Line Items]
Net sales	894.8	508.2
Reportable segment income	203.1	104.2
Cost of goods sold	586.4	324.9
Selling, general and administrative	90.2	68.5
Research and development	15.1	10.6
Operating Segments | Electrical Connections
Segment Reporting Information [Line Items]
Net sales	347.2	301.1
Reportable segment income	84.8	85.1
Cost of goods sold	205.7	166.9
Selling, general and administrative	50.9	43.9
Research and development	$ 5.8	$ 5.2