Pensions and Post-Retirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2020

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost for Pension Plans

The following table provides the components of net periodic benefit cost for the pension plans for the three months ended March 31, 2020 and 2019:

	Three Months Ended March 31,
	2020			2019
(Dollars in millions)
Service cost	$	0.3		$	0.4
Interest cost		1.6			2.0
Expected return on plan assets		(2.0	)		(2.0	)
Amortization of net loss		0.4			0.4
Net periodic benefit cost	$	0.3		$	0.8
Defined contribution plan expense	$	1.6		$	1.6