Retirement Benefits Plans (Tables)

3 Months Ended

Mar. 31, 2013

Defined benefit plan expense consisted of the following components:



	Three Months Ended March 31,
	2013			2012
	(Dollars in millions)
Interest cost on benefit obligations	0.3			0.4
Expected return on plan assets	(0.6		)	(0.3		)
Amortization of actuarial losses	0.3			0.2
	$	—		$	0.3

Postretirement benefit plans benefit consisted of the following components:



	Three Months Ended March 31,
	2013			2012
	(Dollars in millions)
Service cost	$	0.1		$	0.1
Interest cost on benefit obligations	0.3			0.5
Amortization of:
Actuarial losses	0.3			0.3
Prior service benefit	(1.4		)	(1.4		)
	$	(0.7	)	$	(0.5	)