Equity (Tables)

3 Months Ended

Mar. 31, 2023

Equity [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
Reclassifications, net		(0.9	)	(a)		—			(0.9	)
Balance as of March 31, 2023	$	26.2			$	(7.6	)	$	18.6
Balance as of December 31, 2021	$	2.6			$	(1.4	)	$	1.2
Foreign currency gain		—				1.8			1.8
Balance as of March 31, 2022	$	2.6			$	0.4		$	3.0

(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 Condensed Consolidated Statements of Operations. See Note 8 for further disclosures.