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Stock-Based Compensation (Stock-Based Compensation Costs) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Stock-Based Compensation    
Restricted stock and restricted stock units $ 1.2 $ 2.3
Stock options, performance awards and other 0.3 0.5
Less: costs capitalized as part of inventory   (0.3)
Expense included in selling, general and administrative and advanced technology costs 1.5 2.5
Total recognized tax benefit   $ 0.9