Equity Method Investments (Income Statement) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]
Total revenues	$ 774.6	$ 536.8	$ 167.5
Gross loss	(11.3)	(7.8)	(6.1)
Operating and non-operating expense	25.6	16.9	4.3
Net loss	$ (36.9)	$ (24.7)	$ (10.4)