Stock-Based Compensation (Stock-Based Compensation Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation [Abstract]
Restricted Stock or Unit Expense	$ 0.1	$ 0.1	$ 0.2	$ 0.6
Stock or Unit Option Plan Expense	0.0	0.0	0.1	0.0
Allocated Share-based Compensation Expense	$ 0.1	$ 0.1	$ 0.3	$ 0.6