Equity (Tables)

12 Months Ended

Dec. 31, 2024

Shareowners Deficit [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component

The changes in accumulated other comprehensive income (loss) by component were as follows:

(dollars in millions)	Unrecognized Net Periodic Pension and Postretirement Benefit (Cost)				Foreign Currency Translation Gain (Loss)				Total
Balance as of December 31, 2022	$	27.1			$	(7.6	)		$	19.5
Remeasurement of benefit obligations		10.5				—				10.5
Reclassifications, net		(4.4	)	(a)		—				(4.4	)
Foreign currency gain		—				2.6				2.6
Balance as of December 31, 2023	$	33.2			$	(5.0	)		$	28.2
Remeasurement of benefit obligations		8.1				—				8.1
Reclassifications, net		(6.3	)	(a)		—				(6.3	)
Foreign currency loss		—				(6.5	)			(6.5	)
Accumulated foreign currency translation loss divested of in discontinued operations		—				11.5		(b)		11.5
Balance as of December 31, 2024	$	35.0			$	—			$	35.0

(a)These reclassifications are included in the other components of net periodic pension and postretirement benefit plans expense and represent amortization of prior service benefit and actuarial gain, net of tax. The other components of net periodic pension and postretirement benefit plans expense are recorded in "Other components of pension and postretirement benefit plans expense (benefit)" on the Consolidated Statements of Operations. See Note 12 for further disclosures.

(b)The accumulated foreign currency translation loss represents the cumulative translation adjustment included in accumulated other comprehensive income that was adjusted as a result of the sale of the Disposal Group. See Note 3 for further disclosures.