Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Interest income	$ 0.1	$ 0.3	$ 0.3	$ 0.8
Unrealized gains (losses) on financial derivatives	0.0	2.2	0.0	3.6
Realized gains on investments	0.0	0.0	0.5	0.4
All other (expense) income, net	(1.0)	(0.3)	(0.9)	1.1
Other (expense) income, net	$ (0.9)	$ 2.2	$ (0.1)	$ 5.9