Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

At December 31, 2013, future minimum rental payments under non-cancelable operating leases were:

Year	($ in millions)
2014	$	10.5
2015	9.0
2016	7.4
2017	5.1
2018	4.1
Thereafter	17.4
Total	$	53.5