Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning Balance	$ 2,221.8	$ 1,858.1
Acquisitions/ divestitures	441.9	369.9
Foreign currency translation/other	14.3	(6.2)
Ending Balance	2,678.0	2,221.8	$ 1,858.1
Goodwill, Impairment Loss	0.0	0.0	0.0
Systems Protection
Goodwill [Roll Forward]
Beginning Balance	790.1	430.4
Acquisitions/ divestitures	398.0	365.9
Foreign currency translation/other	14.3	(6.2)
Ending Balance	1,202.4	790.1	430.4
Electrical Connections
Goodwill [Roll Forward]
Beginning Balance	1,431.7	1,427.7
Acquisitions/ divestitures	43.9	4.0
Foreign currency translation/other	0.0	0.0
Ending Balance	$ 1,475.6	$ 1,431.7	$ 1,427.7