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Employee Benefit Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2025

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Costs

The components of net periodic benefit cost for our pension plans were as follows (dollars in millions):

		Pension Plans
		Three Months Ended September 30,								Nine Months Ended September 30,
		2025				2024				2025				2024
Service cost		$	2.4			$	2.9			$	7.6			$	9.2
Interest cost			14.2				13.8				42.8				41.5
Expected return on plan assets			(15.6	)			(16.4	)			(46.9	)			(49.3	)
Net amortization of unrecognized amounts
Prior service cost			1.4				1.4				4.3				4.1
Actuarial loss			—				0.1				—				0.5
Net periodic benefit cost		$	2.4			$	1.8			$	7.8			$	6.0

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 715
-SubTopic 20
-Subparagraph (h)
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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