Income Taxes (Valuation Allowance) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Beginning balance	$ 50.8	$ 46.9	$ 5.8
Accumulated other comprehensive income (loss)	4.9	(6.6)	0.7
Ending balance	133.3	50.8	46.9
Increase to valuation allowance [Member]
Valuation Allowance, Deferred Tax Asset, Change in Amount	82.2	28.0	44.9
Decrease to valuation allowance [Member]
Valuation Allowance, Deferred Tax Asset, Change in Amount	(3.0)	(15.8)	(0.5)
Foreign Exchange [Member]
Valuation Allowance, Deferred Tax Asset, Change in Amount	(1.6)	(1.7)	0.0
Parent Company's Net Investment [Member]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 0.0	$ 0.0	$ (4.0)