Capital Leases (Tables)

12 Months Ended

Dec. 31, 2017

Capital Leases

Schedule of aggregate future minimum lease payments under capital leases

Aggregate future minimum lease payments under capital leases are as follows (in millions):

As of December 31,	Total
2018	$	8.3
2019		1.0
2020		0.7
2021		—
Total future minimum lease payments		10.0
Less: amount representing interest		(0.5)
Present value of future minimum lease payments		9.5
Less: current portion of capital lease obligations		(8.0)
Total capital lease obligations, less current portion	$	1.5