Commitments and Contingencies - Summary of Pre-Close Environmental Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Pre-Close Environmental Costs	$ 20.0
Amount spent through December 31, 2016	(19.9)
Remaining Pre-Close Environmental Costs	$ 0.1