Goodwill and Other Identifiable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reporting unit were as follows:

In millions	December 31, 2024		Acquisitions/ divestitures		Foreign currency translation/other		December 31, 2025
Systems Protection	$	790.1	$	398.0	$	14.3	$	1,202.4
Electrical Connections	1,431.7		43.9		—		1,475.6
Total goodwill	$	2,221.8	$	441.9	$	14.3	$	2,678.0

In millions	December 31, 2023		Acquisitions/ divestitures		Foreign currency translation/other		December 31, 2024
Systems Protection	$	430.4	$	365.9	$	(6.2)	$	790.1
Electrical Connections	1,427.7		4.0		—		1,431.7
Total goodwill	$	1,858.1	$	369.9	$	(6.2)	$	2,221.8

Identifiable Intangible Assets

Identifiable intangible assets consisted of the following at December 31:

	2025						2024
In millions	Cost		Accumulated amortization		Net		Cost		Accumulated amortization		Net
Definite-life intangibles
Customer relationships	$	1,904.0	$	(551.5)	$	1,352.5	$	1,571.7	$	(458.7)	$	1,113.0
Proprietary technologies and patents	111.8		(31.8)		80.0		78.2		(19.5)		58.7
Other definite-life intangible assets	139.5		(63.1)		76.4		63.7		(18.9)		44.8
Total definite-life intangibles	2,155.3		(646.4)		1,508.9		1,713.6		(497.1)		1,216.5
Indefinite-life intangibles
Trade names	367.6		—		367.6		370.5		—		370.5
Total intangibles	$	2,522.9	$	(646.4)	$	1,876.5	$	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 next five years is as follows:

In millions	2026		2027		2028		2029		2030
Estimated amortization expense	$	153.9	$	136.4	$	111.0	$	111.0	$	107.9