Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Income and Expenses [Abstract]
Interest income	$ 0.0	$ 0.2	$ 0.2	$ 0.5
Unrealized gains (losses) on financial derivatives	0.0	0.5	0.0	1.4
Realized gains on investments	0.2	0.2	0.5	0.4
All other, net	0.2	0.9	0.1	1.4
Other income, net	$ 0.4	$ 1.8	$ 0.8	$ 3.7