Equity

6 Months Ended

Jun. 30, 2024

Equity [Abstract]

Equity

10. Equity

Accumulated Other Comprehensive Income (Loss)

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 March 31, 2024	$	32.4			$	(7.6	)	$	24.8
Remeasurement of benefit obligations		(2.8	)			—			(2.8	)
Reclassifications, net		(1.3	)	(a)		—			(1.3	)
Foreign currency loss		—				(1.0	)		(1.0	)
Balance as of June 30, 2024	$	28.3			$	(8.6	)	$	19.7
Balance as of March 31, 2023	$	26.2			$	(7.6	)	$	18.6
Reclassifications, net		(1.2	)	(a)		—			(1.2	)
Foreign currency gain		—				2.4			2.4
Balance as of June 30, 2023	$	25.0			$	(5.2	)	$	19.8
(dollars in millions)	Unrecognized Net Periodic Pension and Postretirement Benefit (Cost)				Foreign Currency Translation Gain (Loss)			Total
Balance as of December 31, 2023	$	33.2			$	(5.0	)	$	28.2
Remeasurement of benefit obligations		(2.8	)			—			(2.8	)
Reclassifications, net		(2.1	)	(a)		—			(2.1	)
Foreign currency loss		—				(3.6	)		(3.6	)
Balance as of June 30, 2024	$	28.3			$	(8.6	)	$	19.7
Balance as of December 31, 2022	$	27.1			$	(7.6	)	$	19.5
Reclassifications, net		(2.1	)	(a)		—			(2.1	)
Foreign currency gain		—				2.4			2.4
Balance as of June 30, 2023	$	25.0			$	(5.2	)	$	19.8

(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 and pension settlement benefits, 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 (benefit) expense" on the Condensed Consolidated Statements of Operations. See Note 9 for further disclosures.