Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

After-tax components of comprehensive income (loss)

The following table sets forth the after-tax components of accumulated other comprehensive income and changes thereto recorded during the six months ended June 30, 2021:

	Foreign Currency Translation Adjustment		Prior Service Credit Associated with Postretirement Plans		Total Accumulated Other Comprehensive Income
	(Dollars in millions)
December 31, 2020	$	1.8	$	204.0	$	205.8
Reclassification from other comprehensive income to earnings	—		(22.0)		(22.0)
Current period change	(0.4)		—		(0.4)
June 30, 2021	$	1.4	$	182.0	$	183.4