Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum lease payments under non-cancelable operating leases amounted to $10.4 million at December 31, 2014 as follows:

Years ending December 31,	(in millions)
2015	$	3.9
2016	$	1.5
2017	$	1.3
2018	$	1.2
2019	$	1.2
Thereafter	$	1.3