Equity Method Investments (Income Statement) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Total revenues	$ 589.4	$ 774.6	$ 536.8
Gross (loss) profit	(13.2)	(11.3)	(7.8)
Operating and non-operating expense	22.2	25.6	16.9
Net loss	$ (35.4)	$ (36.9)	$ (24.7)