Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Commitments for Operating Leases and Long-Term Purchase Obligations

As of December 31, 2013, future minimum commitments for operating leases and long-term purchase obligations for the years ending December 31 are as follows:

	Operating Leases		Long-Term Purchase Obligations
	(Dollars in millions)
2014	$	55.3	$	275.7
2015	51.0		144.3
2016	43.8		64.7
2017	32.4		7.9
2018	24.4		2.2
Thereafter	65.5		—
Total minimum commitments	$	272.4	$	494.8