Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

At December 31, 2012, future minimum lease payments required under operating leases having initial or remaining non-cancellable lease terms for the next five years are as follows:

(dollars in millions)
2013	$	16.2
2014	12.5
2015	9.0
2016	4.1
2017	1.6
Thereafter	1.5
Total	$	44.9

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The following table presents the activity for the Company’s asset retirement obligations, which are included in "Other noncurrent liabilities" in the Consolidated Balance Sheets:

	December 31,
(dollars in millions)	2012		2011
Balance, beginning of period	$	5.4	$	5.1
Liabilities incurred	0.2		0.2
Revisions to estimated cash flow	1.1		(0.2		)
Accretion expense	0.4		0.3
Balance, end of period	$	7.1	$	5.4