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Stock-Based Compensation (Stock-Based Compensation Costs) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation [Abstract]      
Restricted stock and restricted stock units $ 1.9 $ 4.4 $ 7.1
Stock options, performance awards and other 0.1 0.8 1.3
Less: costs capitalized as part of inventory 0 (0.1) (0.4)
Expense included in selling, general and administrative and advanced technology costs $ 2.0 $ 5.1 $ 8.0