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Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 2,221.8
Acquisitions/divestitures	443.4
Foreign currency translation/other	13.6
Ending Balance	2,678.8
Systems Protection
Goodwill [Roll Forward]
Beginning Balance	790.1
Acquisitions/divestitures	399.6
Foreign currency translation/other	13.6
Ending Balance	1,203.3
Electrical Connections
Goodwill [Roll Forward]
Beginning Balance	1,431.7
Acquisitions/divestitures	43.8
Foreign currency translation/other	0.0
Ending Balance	$ 1,475.5

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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- Definition

Amount of increase (decrease) of asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized, classified as other.

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Amount of increase (decrease) from measurement period adjustment of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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