Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2011

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Schedule of Comprehensive Income (Loss)

The Company’s comprehensive income is shown below:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(dollars in millions)	2011			2010			2011			2010
Net income	$	13.5		$	9.6		$	31.4		$	32.4
Other comprehensive income, net of tax:
Defined benefit pension and postretirement plans:
Net gain arising during the period, net of tax of $0.9	1.4			—			1.4			—
Amortization of prior service benefits included in net income,
net of tax of $(1.2), $(1.2), $(2.4), $(2.4)	(2.0		)	(2.0		)	(4.0		)	(4.0		)
Amortization of net loss included in net income, net of tax of $1.8, $1.3, $3.8, $2.6	3.3			2.3			6.5			4.6
Reclassification adjustment for curtailment loss included in net income,
net of tax of $1.5	2.7			—			2.7			—
Other comprehensive income	5.4			0.3			6.6			0.6
Total comprehensive income	$	18.9		$	9.9		$	38.0		$	33.0