Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

At December 31, 2014, future minimum rental payments under non-cancelable operating leases were:

Year	($ in millions)
2015	$	10.3
2016	8.1
2017	6.1
2018	4.5
2019	3.4
Thereafter	30.6
Total	$	63.0