Stock-Based Compensation (Stock-Based Compensation Costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation [Abstract]
Restricted stock and restricted stock units	$ 0.2	$ 0.4	$ 0.5	$ 1.3
Stock options, performance awards and other	0	0	0	0.1
Expense included in selling, general and administrative and advanced technology costs	$ 0.2	$ 0.4	$ 0.5	$ 1.4