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Goodwill and Other Identifiable Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reportable segment were as follows:

In millions			December 31, 2024			Acquisitions/ divestitures									Foreign currency translation/other			September 30, 2025
Systems Protection			$	790.1		$	399.6								$	13.6		$	1,203.3
Electrical Connections			1,431.7			43.8									—			1,475.5
Total goodwill			$	2,221.8		$	443.4								$	13.6		$	2,678.8

Schedule of Finite-Lived Intangible Assets

Identifiable intangible assets consisted of the following:

			September 30, 2025												December 31, 2024
In millions			Cost			Accumulated amortization			Net						Cost			Accumulated amortization			Net
Definite-life intangibles
Customer relationships			$	1,903.4		$	(527.2)		$	1,376.2					$	1,571.7		$	(458.7)		$	1,113.0
Proprietary technology and patents			111.5			(28.4)			83.1						78.2			(19.5)			58.7
Other finite-lived intangible assets			139.5			(49.5)			90.0						63.7			(18.9)			44.8
Total definite-life intangibles			2,154.4			(605.1)			1,549.3						1,713.6			(497.1)			1,216.5
Indefinite-life intangibles
Trade names			367.6			—			367.6						370.5			—			370.5
Total intangibles			$	2,522.0		$	(605.1)		$	1,916.9					$	2,084.1		$	(497.1)		$	1,587.0

Schedule of Indefinite-Lived Intangible Assets

Identifiable intangible assets consisted of the following:

			September 30, 2025												December 31, 2024
In millions			Cost			Accumulated amortization			Net						Cost			Accumulated amortization			Net
Definite-life intangibles
Customer relationships			$	1,903.4		$	(527.2)		$	1,376.2					$	1,571.7		$	(458.7)		$	1,113.0
Proprietary technology and patents			111.5			(28.4)			83.1						78.2			(19.5)			58.7
Other finite-lived intangible assets			139.5			(49.5)			90.0						63.7			(18.9)			44.8
Total definite-life intangibles			2,154.4			(605.1)			1,549.3						1,713.6			(497.1)			1,216.5
Indefinite-life intangibles
Trade names			367.6			—			367.6						370.5			—			370.5
Total intangibles			$	2,522.0		$	(605.1)		$	1,916.9					$	2,084.1		$	(497.1)		$	1,587.0

Estimated Future Amortization Expense for Identifiable Intangible Assets

Estimated future amortization expense for identifiable intangible assets during the remainder of 2025 and the next five years is as follows:

			Q4
In millions			2025			2026			2027			2028			2029			2030
Estimated amortization expense			$	41.1		$	153.8		$	136.3		$	111.0		$	111.0		$	107.8

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