Segment Reporting - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting [Abstract]
Asset optimization revenue	$ 26.0	$ 27.7	$ 89.1	$ 120.7
Asset optimization cost of revenues	$ 25.9	$ 28.2	$ 89.1	$ 119.4